Homepage - RF Cafe
Webmaster: Kirt Blattenberger | KB3UON | Sitemap | ©1996-2014     Visit RF Cafe on
      Menu below is just a small sample of what is here!          Visit RF Cafe on Facebook Visit RF Cafe on Twitter Visit RF Cafe on LinkedIn
Custom Search
More than 10,000 searchable pages indexed.
•−•  ••−•    −•−•  •−  ••−•  •
RF Cafe Morse Code >Hear It<

Suggestions for Reciprocal Links to RF Cafe
& All of the Day in History Commemorative RF Cafe Logos

 

It is a well-know fact that search engine rankings are enhanced when quality websites contain reciprocal links to each other. If I have listed your company on RF Cafe and you have not yet provided a reciprocal link, please consider using one of the following prepared links of either text or a graphic.

RF Cafe does NOT purposely provide links to "keyword magnet" sites that exist purely to lure searchers onto their website with the sole purpose of flashing ads in their faces. Those site offer nothing other than a useless list of hyperlinks. Please do not even bother contacting me for a reciprocal link if you run that sort of site. Also, do not send a link request unless you actually work at the company you claim to represent; I am sick of lying website optimizers promising me a reciprocal link on their client's website and then never following through after I list them.

RF Cafe returns very highly, often at the top of the list on page one, for many key engineering and scientific keyword searches, and is regarded as a "high quality website" amongst search engines. Having your website linked to from RF Cafe is a definite asset for you that I am happy to provide, since I personally control every listing. Many requests have been rejected over the years either because they applicant's website is not of the quality that RF Cafe visitors need to be exposed to, or because they are simply not relevant. I'm watching your back!

Thank-you.   - Kirt Blattenberger

Many of these logos commemorate people, places, and companies. My intention is to pay tribute to the significance of each. Images have been gathered from all over the Internet; ownership, copyright, legal right to use, etc., are all acknowledged when possible, and are in no way meant to imply any affiliation between RF Cafe and the entity being referenced. If you object to the use of an image and are the legal owner, please let me know and I will be glad to remove it.

The easy way to use one of the images is to just place your cursor over it, right-click and do "Copy," then simply paste it into your HTML page. The hyperlink, image, and mouse-over description will all paste in automatically.


50 x 150 pixel graphic  (2.77 kB)

Please click here visit RF Cafe
50 x 150 pixel graphic (2.40 kB)


50 x 150 pixel graphic  (3.97 kB)
Retro Logo


50 x 150 pixel graphic  (2.45 kB)
We Know Your World


50 x 150 pixel graphic  (3.55 kB)
Smith Chart Logo


50 x 150 pixel graphic  (2.53 kB)
We Filter Out the Noise Logo

Please click here to visit the RF Cafe Job Board
30 x 100 pixel graphic  (0.89 kB)

RF Cafe Jobs Board. Click here to return to the RF Cafe homepage.
50 x 150 pixel graphic  (1.81 kB)
National Engineer's Week
February (variable)

RF Cafe Jobs Board. Click here to return to the RF Cafe homepage.
50 x 150 pixel graphic  (3.57 kB)
National Engineer's Week
February (variable)

January

Happy New Year!!!  Please click here to visit RF Cafe.
50 x 150 pixel graphic  (4.78 kB)
New Year's Day
January 1

Happy Birthday Isaac Asimov!  Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.73 kB)
Happy Birthday Isaac Asimov!
January 2, 1920

World's First Electric Watch Sold.  Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.73 kB)
World's First Electric Watch Sold
January 3, 1957

Sir Isaac Newton's Birthday.  Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.87 kB)
Sir Isaac Newton's Birthday
January 4, 1643

Marconi Established 1st Distress Signal.  Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.41 kB)
Marconi Established 1st Distress Signal
January 7, 1904

Happy Birthday Robert Wilson!  Please click here to visit RF Cafe.
50 x 150 pixel graphic  (3.55 kB)
Happy Birthday Robert Wilson!
January 10, 1936

George Pierce Born Today.  Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.45 kB)
George Pierce Born Today
January 11, 1872

Emergency 911 Phone Number Adopted.  Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.39 kB)
Emergency 911 Phone Number Adopted
January 12, 1968

Lee de Forest Receives Patent for Triode Tube.  Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.70 kB)
Lee de Forest Receives Patent for Triode Tube
January 15, 1907

1st Ever Docking by Soyuz 4 & 5 - Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.35 kB)
1st Ever Docking by Soyuz 4 & 5
January 16, 1969

Happy Birthday Benjamin Franklin! - Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.71 kB)
Happy Birthday Benjamin Franklin!
January 17, 1706

Ray Dolby's Birthday! - Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.71 kB)
Ray Dolby's Birthday
January 18, 1933

James Watt's birthday - Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.81 kB)
James Watt's Birthday
January 19, 1736

Buzz Aldrin birthday - Please click here to visit RF Cafe.
50 x 150 pixel graphic  (3.00 kB)
Edwin "Buzz" Aldrin's Birthday
January 20, 1930

André-Marie Ampère birthday - Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.94 kB)
André-Marie Ampère's Birthday
January 20, 1775

Concord SST Went Into Service - Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.40 kB)
Concord SST Went Into Service
January 21, 1976

Uranium Atom 1st Split - Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.95 kB)
Uranium Atom 1st Split
January 22, 1939

Apple Began Selling the Macintosh Computer - Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.16 kB)
Apple Began Selling the Macintosh Computer
January 24, 1984

AT&T Transcontinental Telephone Line Inaugurated - Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.67 kB)
AT&T Transcontinental Telephone Line Inaugurated
January 25, 1915

Edison's Incandescent Bulb Patented - Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.96 kB)
Edison's Incandescent Bulb Patented
January 27, 1880

Space Shuttle Challenger Exploded - Please click here to visit RF Cafe.
50 x 150 pixel graphic  (5.03 kB)
Space Shuttle Challenger Explosion
January 28, 1986

Explorer 1 Launched - Please click here to visit RF Cafe.
50 x 150 pixel graphic  (1.96 kB)
Explorer 1 Launched
January 31, 1958

February

HP-35 Calculator Went on Sale - Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.36 kB)
HP-35 Calculator Went on Sale
February 1, 1972

Groundhog Day - Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.88 kB)
Groundhog Day
February 2

"The Day the Music Died" - Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.52 kB)
"The Day the Music Died"
February 3, 1959

Super Bowl XLII - Please click here to visit RF Cafe.
50 x 150 pixel graphic  (3.47 kB)
Super Bowl XLII
February 3, 2008

Happy Birthday Charles A. Lindbergh - Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.32 kB)
Happy Birthday Charles A. Lindbergh
February 4, 18902

Happy Birthday Charles Wheatstone - Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.44 kB)
Happy Birthday Charles Wheatstone
February 6, 1802

Happy Birthday Harry Nyquist! - Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.55 kB)
Happy Birthday Harry Nyquist!
February 7, 1889

Boy Scouts of America Founded  - Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.35 kB)
Boy Scouts of America Founded
February 8, 1910

Walter H. Brattain's Birthday - Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.80 kB)
Walter H. Brattain's Birthday
February 10, 1902

Thomas Alva Edison's Birthday - Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.97 kB)
Thomas Alva Edison's Birthday
February 11, 1847

Heinrich Lenz's Birthday - Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.74 kB)
Heinrich Lenz's Birthday
February 12, 1804

ENIAC Debut - Please click here to visit RF Cafe.
50 x 150 pixel graphic  (3.51 kB)
The ENIAC Debut
February 13, 1946

Happy Valentine's Day!  Please click here to visit RF Cafe.
50 x 150 pixel graphic  (3.38 kB)
Valentine's Day
February 14

Happy Birthday Galileo Galilei!  Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.25 kB)
Happy Birthday Galileo Galilei!
February 15, 1584

ASME Established.  Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.25 kB)
ASME Established
February 16, 1880

Engineer's Week. Click here to return to the RF Cafe homepage.
50 x 150 pixel graphic  (2.71 kB)
National Engineer's Week 2007
February 18, 2007

Vanguard II - 1st Weather Satellite - Launched.  Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.25 kB)
Vanguard II - 1st Weather Satellite - Launched
February 17, 1959

Happy Birthday Alessandro Volta!  Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.49 kB)
Happy Birthday Alessandro Volta!
February 18, 1745

Svante Arrhenius' Birthday - Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.33 kB)
Svante Arrhenius' Birthday
February 19, 1859

Engineers Week 2008. Click here to return to the RF Cafe homepage.
50 x 150 pixel graphic  (3.81 kB)
National Engineer's Week 2008
February 19, 2008

Ludwig Boltzmann's Birthday - Please click here to visit RF Cafe.
50 x 150 pixel graphic  (3.43 kB)
Ludwig Boltzmann's Birthday
February 20, 1844

Happy Birthday Heinrich Hertz! Click here to return to the RF Cafe homepage.
50 x 150 pixel graphic  (2.48 kB)
Happy Birthday Heinrich Hertz!
February 22, 1857

Iwo Jima Flag Raising. Click here to return to the RF Cafe homepage.
50 x 150 pixel graphic  (3.87 kB)
Iwo Jima Flag Raising
February 23, 1945

"His Master's Voice" trademarked. Click here to return to the RF Cafe homepage.
50 x 150 pixel graphic  (3.15 kB)
"His Master's Voice" Trademarked
February 24, 1925

Sir Robert Watson-Watt Introduced RADAR - Please click here to visit RF Cafe.
50 x 150 pixel graphic  (3.41 kB)
Sir Robert Watson-Watt Introduced RADAR
February 26, 1935

Happy Birthday David Sarnoff! - Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.33 kB)
Happy Birthday David Sarnoff!
Born February 27, 1891

Happy Birthday Linus Pauling! - Please click here to visit RF Cafe.
50 x 150 pixel graphic  (3.07 kB)
Happy Birthday Linus Pauling!
Born February 28, 1901

March

Happy Birthday John Pell! - Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.40 kB)
Happy Birthday John Pell!
Born March 1, 1611

Happy Birthday Dr. Seuss! - Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.65 kB)
Happy Birthday Dr. Seuss!
Born March 2, 1904

Don't forget to reset you clock for Daylight Saving Time.  Please click here to visit RF Cafe
50 x 150 pixel graphic  (3.03 kB)
Daylight Saving Time
Begins 2nd Sunday in March
Ends 1st Sunday in November

National Bureau of Standards (now NIST) Created - Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.20 kB)
National Bureau of Standards (now NIST) Created
March 3, 1901

Jules Lissajous born. Click here to return to the RF Cafe homepage.
50 x 150 pixel graphic  (2.55 kB)
Jules A. Lissajous' Birthday
March 4, 1822

Maiden Flight of the Spitfire. Click here to return to the RF Cafe homepage.
50 x 150 pixel graphic  (2.06 kB)
Maiden Flight of the Spitfire
March 5, 1936

Joseph von Fraunhofer's Birthday - Please click here to visit RF Cafe.
50 x 150 pixel graphic  (3.72 kB)
Joseph von Fraunhofer's Birthday
March 6, 1787

Selma to Montgomery march for equality.  Please click here to visit RF Cafe.
50 x 150 pixel graphic  (3.75 kB)
Selma-to-Montgomery Freedom March
March 7, 1965

Voyager Discovers Active Volcanoes on Io.  Please click here to visit RF Cafe.
50 x 150 pixel graphic  (3.75 kB)
Voyager Discovers Active Volcanoes on Io
March 8, 1979

Alexander Bell Utters "Watson - come here..."  Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.84 kB)
Alexander Bell Utters "Watson - come here..."
March 10, 1876

1st Meeting of the Audio Engineering Society.  Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.76 kB)
1st Meeting of the Audio Engineering Society
March 11, 1948

Gustav Kirchhoff born. Click here to return to the RF Cafe homepage.
50 x 150 pixel graphic  (2.49 kB)
Gustav Kirchhoff's Birthday
March 12, 1824

Sir William Herschel discovered Uranus. Click here to return to the RF Cafe homepage.
50 x 150 pixel graphic  (2.05 kB)
Sir William Herschel discovered Uranus
March 13, 1781

Pi Day. Click here to return to the RF Cafe homepage.
50 x 150 pixel graphic  (3.38 kB)
International Pi (π) Day
March 14 (at 1:59:26 o'clock - 3.1415926)

1st .com Web Address Assigned. Click here to return to the RF Cafe homepage.

Beware the Ides of March. Click here to return to the RF Cafe homepage.
50 x 150 pixel graphic  (3.48 kB)
Beware the Ides of March
March 15

Georg Simon Ohm's Birthday - Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.93 kB)
Georg Simon Ohm's Birthday
March 16, 1789

Happy St. Patrick's Day!!! Please click here to visit RF Cafe.
50 x 150 pixel graphic  (3.83 kB)
St. Patrick's Day
March 17

Happy Birthday Rudolf Diesel! Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.10 kB)
Happy Birthday Rudolf Diesel!
March 18, 1858

The swallows return to San Juan Capistrano.  Please click here to visit RF Cafe.
50 x 150 pixel graphic  (3.59 kB)
Swallows Return to San Juan Capistrano
March 19

Einstein Publishes General Theory of Relativity.  Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.75 kB)
Einstein Publishes General Theory of Relativity
March 20, 1916

Vernal Equinox.  Please click here to visit RF Cafe
50 x 150 pixel graphic  (4.22 kB)
Vernal Equinox (1st day of spring)

Jean Baptiste Joseph Fourier born. Click here to return to the RF Cafe homepage.
50 x 150 pixel graphic  (3.44 kB)
Jean Baptiste Joseph Fourier's Birthday
March 21, 1768

Robert Millikan's Birthday. Click here to return to the RF Cafe homepage.
50 x 150 pixel graphic  (2.38 kB)
Robert Millikan's Birthday
March 22, 1868

Happy Birthday Wernher von Braun! Click here to return to the RF Cafe homepage.
50 x 150 pixel graphic  (2.51 kB)
Happy Birthday Wernher von Braun
March 23, 1912

Happy Birthday Fleeming Jenkin! Click here to return to the RF Cafe homepage.
50 x 150 pixel graphic  (1.87 kB)
Happy Birthday Fleeming Jenkin
March 25, 1833

Wilhelm Röntgen's Birthday - Please click here to visit RF Cafe.
50 x 150 pixel graphic  (3.03 kB)
Wilhelm Röntgen's Birthday
March 27, 1845

1st Recorded Sighting of Halley's Comet - Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.72 kB)
1st Recorded Sighting of Halley's Comet
March 30, 239 BC

Happy Birthday René Descartes! - Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.21 kB)
Happy Birthday René Descartes!
March 31, 1596

Happy Easter!  Please click here to visit RF Cafe.
50 x 150 pixel graphic  (4.02 kB)
Happy Easter
March-April (variable)

April

April Fool's Day. Click here to return to the RF Cafe homepage.
50 x 150 pixel graphic  (2.61 kB)
April Fool's Day
April 1

2001: A space Odyssey Premiered.  Click here to return to the RF Cafe homepage.
50 x 150 pixel graphic  (2.47 kB)
2001: A space Odyssey Premiered
April 2, 1968

World's first cellphone call placed. Click here to return to the RF Cafe homepage.
50 x 150 pixel graphic  (2.90 kB)
World's First Cellphone Call Made
on a Motorola DynaTAC
April 3, 1973

Orwell's 1984... Day 1 - Please click here to visit RF Cafe.
50 x 150 pixel graphic  (1.71 kB)
Orwell's 1984... Day 1
April 4, 1984

Alles Gute zum Geburtstag, Herr Fokker! - Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.69 kB)
Alles Gute zum Geburtstag, Herr Fokker!
April 6, 1890

Heike Onnes Discovered Superconductivity - Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.35 kB)
Heike Onnes Discovered Superconductivity
April 8, 1911

James McDonnell's Birthday - Please click here to visit RF Cafe.
50 x 150 pixel graphic  (3.13 kB)
James Smith McDonnell's Birthday
April 9, 1899

U.S. Patent Systems Began - Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.13 kB)
U.S. Patent Systems Began
April 10, 1790

1st Flight of the Space Shuttle.  Please click here to visit RF Cafe.
50 x 150 pixel graphic  (3.03 kB)
1st Flight of the Space Shuttle - Columbia
April 12, 1981

Sir Robert Watson-Watt, "Father of Radar," Born.  Please click here to visit RF Cafe.
50 x 150 pixel graphic  (3.08 kB)
Sir Robert Watson-Watt, "Father of Radar," Born.
April 13, 1892

The Sinking of the RMS Titanic.  Please click here to visit RF Cafe.
50 x 150 pixel graphic  (3.08 kB)
The Sinking of the RMS Titanic
April 14, 1912

The Tax Man Cometh!  Please click here to visit RF Cafe.
50 x 150 pixel graphic  (3.16 kB)
Tax Day in the U.S.A.
April 15

Harriet Quimby Crosses the English Channel Solo - Please click here to visit RF Cafe.
50 x 150 pixel graphic  (3.77 kB)
Harriet Quimby Crosses the English Channel Solo
April 16, 1912

Ford Introduced the Mustang - Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.50 kB)
Ford Introduced the Mustang
April 17, 1964

Paul Revere's Midnight Ride - Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.94 kB)
Paul Revere's Midnight Ride
April 18, 1775

Happy Birthday, Melanie! - Please click here to visit RF Cafe.
50 x 150 pixel graphic  (4.70 kB)
Happy Birthday, Melanie!
April 19, 19-something

Happy Birthday to Jean-Baptiste Biot (Biot-Savart Law)!  Please click here to visit RF Cafe.
50 x 150 pixel graphic  (3.00 kB)
Happy Birthday Jean-Baptiste Biot (Biot-Savart Law)
April 21, 1774

Happy Birthday Robert Oppenheimer! - Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.74 kB)
Happy Birthday Robert Oppenheimer!
April 22, 1904

Happy Birthday Max Planck! - Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.80 kB)
Happy Birthday Max Planck!
April 23, 1858

Edison General Electric Company Founded - Please click here to visit RF Cafe.
50 x 150 pixel graphic  (3.06 kB)
Edison General Electric Company Founded
April 24, 1889

Happy Birthday to Guglielmo Marconi!  Please click here to visit RF Cafe.
50 x 150 pixel graphic  (3.29 kB)
Happy Birthday Guglielmo Marconi
April 25, 1874

Happy Birthday Charles Richter! Click here to return to the RF Cafe homepage.
50 x 150 pixel graphic  (2.62 kB)
Charles Richter Birthday
April 26, 1900

Happy Birthday Samuel Morse! Click here to return to the RF Cafe homepage.
50 x 150 pixel graphic  (2.89 kB)
Samuel Morse's Birthday
April 27, 1791

"Philosophiae Naturalis Principia Mathematica" -  Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.68 kB)
"Philosophiae Naturalis Principia Mathematica" Published
April 28, 1686

Happy Birthday Philip H. Smith! -  Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.59 kB)
Happy Birthday Philip H. Smith
April 29, 1905

Happy Birthday to Happy Birthday Johann Carl Friedrich Gauss!  Please click here to visit RF Cafe.
50 x 150 pixel graphic  (3.35 kB)
Happy Birthday Johann Carl Friedrich Gauss
April 30, 1777

May

Ford Adopted 40-Hour Work Week. Click here to return to the RF Cafe homepage.
50 x 150 pixel graphic  (3.56 kB)
Ford Adopted 40-Hour Work Week
May 1, 1926

1st Trans-Atlantic TV Broadcast by Early Bird Satellite. Click here to return to the RF Cafe homepage.
50 x 150 pixel graphic  (3.56 kB)
 1st Trans-Atlantic TV Broadcast by Early Bird Satellite
May 2, 1965

Alan Shepard became 1st American in Space. Click here to return to the RF Cafe homepage.
50 x 150 pixel graphic  (3.56 kB)
Alan Shepard became 1st American in Space
May 5, 1961

Hindenburg Disaster. Click here to return to the RF Cafe homepage.
50 x 150 pixel graphic  (3.56 kB)
Hindenburg Disaster
May 6, 1937

V-E Day. Click here to return to the RF Cafe homepage.
50 x 150 pixel graphic  (3.22 kB)
V-E Day (Victory in Europe)
May 8, 1945

1st Time a Laser Beam Was Bounced off the Moon. Click here to return to the RF Cafe homepage.
50 x 150 pixel graphic  (1.95 kB)
1st Time a Laser Beam Was Bounced off the Moon
May 9, 1962

1st Public Demo of VisiCalc. Click here to return to the RF Cafe homepage.
50 x 150 pixel graphic  (1.93 kB)
1st Public Demo of VisiCalc
May 11, 1979

NORAD Was Established. Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.13 kB)
NORAD Was Established
May 12, 1958

Happy Birthday Joseph Henry! Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.27 kB)
Happy Birthday Joseph Henry!
May 13, 1878

Happy Birthday to Gabriel Daniel Fahrenheit!  Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.82 kB)
Happy Birthday Gabriel Daniel Fahrenheit
May 14, 1687

Happy Mother's Day! Click here to return to the RF Cafe homepage.
50 x 150 pixel graphic  (2.85 kB)
Mother's Day
2nd Sunday in May

Peace Officers Memorial Day - Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.83 kB)
Peace Officers Memorial Day
May 15

Happy Birthday to Oliver Heaviside!  Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.39 kB)
Happy Birthday Oliver Heaviside
May 18, 1850

Happy Birthday to Johns Hopkins!  Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.40 kB)
Happy Birthday Johns Hopkins
May 19, 1795

Happy Birthday to William "Bill" Hewlett!  Please click here to visit RF Cafe.
50 x 150 pixel graphic  (3.40 kB)
Happy Birthday William "Bill" Hewlett
May 20, 1913

Charles Lindbergh Lands in Paris.  Please click here to visit RF Cafe.
50 x 150 pixel graphic  (3.05 kB)
Charles Lindbergh Lands in Paris
May 21, 1927

John Bardeen born on this date. - Please click here to visit RF Cafe.
50 x 150 pixel graphic  (3.28 kB)
John Bardeen Born
May 23, 1908

Happy Birthday William Gilbert! - Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.19 kB)
Happy Birthday William Gilbert!
May 24, 1544

Happy Birthday Sally Ride! - Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.37 kB)
Happy Birthday Sally Ride!
May 26, 1951

1st Transatlantic Flight - Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.96 kB)
1st Transatlantic Flight
May 27, 1919

Rockwell's Rosie the Riveter on TIME Cover - Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.34 kB)
Rockwell's Rosie the Riveter
on Saturday Evening Post Cover
May 29, 1943

U.S. Copyright Law Passed - Please click here to visit RF Cafe.
50 x 150 pixel graphic  (1.73 kB)
U.S. Copyright Law Passed
May 31, 1790

Memorial Day - Remember Our Fallen Servicemen!  Please click here to visit RF Cafe.
50 x 150 pixel graphic  (3.61 kB)
Memorial Day - Remember Our Fallen Servicemen!
Last Monday in May

June

Happy Birthday Nicholas Léonard Sadi Carnot! - Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.38 kB)
Happy Birthday Nicholas Léonard Sadi Carnot!
June 1, 1796

Robert Morris Page born on this date. - Please click here to visit RF Cafe.
50 x 150 pixel graphic  (3.05 kB)
Robert Morris Page Born
June 2, 1903

Edwin White 1st American to Walk in Space.  Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.98 kB)
Edwin White 1st American to Walk in Space
June 3, 1965

1st Public Hot Air Balloon Flight.  Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.29 kB)
1st Public Hot Air Balloon Flight
June 4, 1783

D-Day. Click here to return to the RF Cafe homepage.
50 x 150 pixel graphic  (4.00 kB)
D-Day
June 6, 1944

Jacques-Arsène d' Arsonval born on this date. - Please click here to visit RF Cafe.
50 x 150 pixel graphic  (3.13 kB)
Jacques-Arsène d' Arsonval Born
June 8, 1851

First time SOS distress signal was used. - Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.36 kB)
First time SOS distress signal was used
June 10, 1909

Happy Birthday Charles Fabry! - Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.65 kB)
Happy Birthday Maurice Paul Auguste Charles Fabry!
June 11, 1867

Baseball Hall of Fame Dedication - Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.82 kB)
Baseball Hall of Fame Dedication
June 12, 1939

Happy Birthday James Clerk Maxwell! - Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.69 kB)
Happy Birthday James Clerk Maxwell!
June 13, 1831

Flag Day. Click here to return to the RF Cafe homepage.
50 x 150 pixel graphic  (2.40 kB)
Flag Day
June 14

Happy Birthday Charles-Augustin de Coulomb! - Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.75 kB)
Happy Birthday Charles-Augustin de Coulomb!
June 14, 1736

Radio Bloemendaal Becomes The Netherland's 1st Radio Station - Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.05 kB)
Radio Bloemendaal Becomes
The Netherland's 1st Radio Station
June 15, 1924

1st Model A Ford Produced - Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.05 kB)
1st Model A Ford Produced
June 16, 1903

Statue of Liberty Arrived in NY - Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.66 kB)
Statue of Liberty Arrived in NY
June 17, 1885

Happy Father's Day! Click here to return to the RF Cafe homepage.
50 x 150 pixel graphic  (3.21 kB)
Happy Father's Day
3rd Sunday in June

Dr. Sally Became 1st U.S. Woman in Space - Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.69 kB)
Dr. Sally Became 1st U.S. Woman in Space
June 18, 1983

Happy Birthday Blaise Pascal!  Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.89 kB)
Happy Birthday Blaise Pascal!
June 19, 1623

U.S. Army Air Force Established - Please click here to visit RF Cafe.
50 x 150 pixel graphic  (1.82 kB)
U.S. Army Air Force Established
June 20, 1935

Summer Solstice.  Please click here to visit RF Cafe

Summer Solstice.  Please click here to visit RF Cafe
50 x 150 pixel graphic  (3.50 kB)
Summer Solstice (1st day of summer)
2009  June 21 05:45 UTC
2010  June 21 11:28 UTC
2011  June 21 17:16 UTC
2012  June 20 23:09 UTC
2013  June 21 05:04 UTC
2014  June 21 10:51 UTC
2015  June 21 16:38 UTC

Happy Birthday to Siméon-Denis Poisson. - Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.54 kB)
Siméon-Denis Poisson Born
June 21, 1781

Greenwich Royal Observatory Established - Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.87 kB)
Greenwich Royal Observatory Established
June 22, 1675

Happy Birthday Wilhelm Cauer! - Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.54 kB)
Happy Birthday Wilhelm Cauer!
June 24, 1900

1st Color TV Broadcast - Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.30 kB)
1st Color TV Broadcast
June 25, 1951

Happy Birthday Lord Kelvin!  Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.89 kB)
Lord Kelvin Born Today
June 26, 1824

Happy Birthday to Augustus De Morgan. - Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.61 kB)
Augustus De Morgan Born
June 27, 1806

Treaty of Versailles. Click here to return to the RF Cafe homepage.
50 x 150 pixel graphic  (3.38 kB)
Treaty of Versailles Signed
June 28, 1919

George Ellery Hale Born Today.  Please click here to visit RF Cafe.
50 x 150 pixel graphic  (3.19 kB)
George Ellery Hale Born Today
June 29, 1868
50 x 150 pixel graphic  ( kB)
Mysterious Explosion over Tunguska, Siberia
June 30, 1908

TEXT LINKS
RF Cafe
RF Cafe - Extensive resource for science and engineering.
RF Cafe - An extensive resource for RF, wireless, and all aspects of science and engineering.
RF Cafe - RF Cafe is a unique portal of RF, microwave, wireless, and other engineering resources. Vast collection of equations, references and conversions for electrical, mechanical, physical, and mathematical fields. Links for vendors, app notes, test notes, ham radio, magazines, books, active forums, patent and communications standards, technical crossword puzzles, quizzes, and much more.

RF Cafe - RF Cafe is a unique portal for RF and microwave engineering resources. There you will find a vast collection of original content with definitions, equations, references and conversions that cover electrical, mechanical, physical, chemical and mathematical fields. Many interactive calculators are available for everything from filters to voltage dividers. In addition, you will find extensive links to other websites for vendor parts, application notes, test notes, amateur radio information, technical magazines and books, patent and communications standards, and much more.

What makes RF Cafe so attractive is the daily headlines, the daily historical events list, and even technology-themed crossword puzzles that you will find nowhere else. The Factoids are always an interesting read, no matter what the subject (always relevant), and some of the Notable Quotes are hilarious. There is always a plethora of new material added, and is highlighted in the Recent Additions list. Even occasional humor items are thrown in to add some levity to the workday.

For the job seeker or the employer seeking applicants, the RF Cafe Jobs page provides a very focused, popular and professional venue for posting and searching resumes.

Kirt Blattenberger is a degreed RF engineer who runs RF Cafe with a degree of passion not apparent in the other top “professional” websites. Many people have been surprised to learn that RF Cafe is not maintained with a full staff of editors and web designers, but it is not.

July

Happy Canada Day! Click here to return to the RF Cafe homepage.
50 x 150 pixel graphic  (2.70 kB)
Canada Day
July 1

Happy Birthday William Bragg! Click here to return to the RF Cafe homepage.
50 x 150 pixel graphic  (2.82 kB)
Happy Birthday William Bragg!
July 2, 1862

The Dog Days of Summer. Click here to return to the RF Cafe homepage.
50 x 150 pixel graphic  (1.73 kB)
The Dog Days of Summer Begin
July 3 to August 11

Happy 4th of July - Independence Day!  Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.73 kB)
Independence Day
July 4, 1776

Happy Birthday William John Macquorn Rankine! - Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.46 kB)
Happy Birthday William John Macquorn Rankine!
July 5, 1820

Solar Challenger Crosses the English Channel. - Please click here to visit RF Cafe.
50 x 150 pixel graphic  (3.78 kB)
Solar Challenger Crosses the English Channel
July 7, 1981

UFOs 1st Reported over Roswell, NM.  Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.17 kB)
UFOs 1st Reported over Roswell, NM
July 8, 1947

Nikola Tesla Born Today.  Please click here to visit RF Cafe.
50 x 150 pixel graphic  (3.63 kB)
Nikola Tesla Born Today
July 9, 1856

EADS was formed. - Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.17 kB)
European Aeronautic Defence and Space (EADS)
was Formed
July 10, 2000

1st Translantic TV Signal Transmitted via Telstar.  Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.60 kB)
1st Transatlantic TV Signal Transmitted via Telstar
July 11, 1962

Happy Birthday Buckminster Fuller! -  Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.49 kB)
Happy Birthday Buckminster Fuller!
July 12, 1895

Ernõ Rubik Born Today.  Please click here to visit RF Cafe.
50 x 150 pixel graphic  (3.20 kB)
Ernõ Rubik was Born Today
July 13, 1944

Sarah E. Goode 1st Black Woman Awarded Patent - Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.18 kB)
Sarah E. Goode 1st Black Woman Awarded Patent
July 14, 1885

Pavel Cherenkov was born. - Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.17 kB)
Pavel Cherenkov was Born
July 15, 1904

The Day of Trinity. Click here to return to the RF Cafe homepage.
50 x 150 pixel graphic  (3.59 kB)
The Day of Trinity
July 16, 1945

Apollo-Soyuz Rondezvous.  Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.05 kB)
Apollo-Soyuz Rondezvous
July 17, 1975

Intel Incorporated Today.  Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.45 kB)
Intel Incorporated Today
July 18, 1968

Apollo 11 Landed on the Moon! - Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.25 kB)
Apollo 11 Landed on the Moon!
July 20, 1969

Friedrich Wilhelm Bessel Born Today.  Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.46 kB)
Friedrich Wilhelm Bessel Born Today
July 22, 1784

Happy Birthday Walter Schottky! - Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.56 kB)
Happy Birthday Walter Schottky!
July 23, 1886

Happy Birthday Amelia Earhart!  Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.13 kB)
Happy Birthday Amelia Earhart!
July 24, 1897

1st Geosynchronous Satellite - Syncom 2 - Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.39 kB)
1st Geosynchronous Satellite - Syncom 2
July 26, 1963

Trans-Alaska Pipeline Loaded 1st Oil onto Tanker - Please click here to visit RF Cafe.
50 x 150 pixel graphic  (3.61 kB)
Trans-Alaska Pipeline Loaded 1st Oil onto Tanker
July 28, 1977

NASA Created by an Act of Congress.  Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.55 kB)
NASA Created by an Act of Congress
July 29, 1958

Happy Birthday Vladimir Zworykin! - Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.91 kB)
Happy Birthday Vladimir Kosma Zworykin!
July 30, 1889


50 x 150 pixel graphic  (2.33 kB)
Samuel Hopkins Awarded 1st U.S. Patent
July 31, 1790

August

1st Official Metre Defined - Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.23 kB)
1st Official Metre Defined
August 1, 1793

Happy Birthday Elisha Gray! - Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.35 kB)
Happy Birthday Elisha Gray!
August 2, 1835

Radio Shack's TRS-80 Computer Announced - Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.10 kB)
Radio Shack's TRS-80 Computer Announced
August 3, 1977

U.S. Coast Guard was Established - Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.82 kB)
U.S. Coast Guard was Established
August 4, 1790

Happy Birthday Neil Armstrong! - Please click here to visit RF Cafe.
50 x 150 pixel graphic  (3.21 kB)
Happy Birthday Neil Armstrong!
August 5, 1930

1st WWW Site Published - Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.44 kB)
Tim Berners-Lee Published the 1st WWW Site
August 6, 1991

Guadalcanal Campaign Launched - Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.30 kB)
Guadalcanal Campaign Launched
August 7, 1942

Happy Birthday, Paul Dirac! - Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.89 kB)
Paul Dirac (Dirac Delta Function) Was Born
August 8, 1902

Happy Birthday Amedeo Avogadro! - Please click here to visit RF Cafe.
50 x 150 pixel graphic  (3.15 kB)
Happy Birthday Amedeo Avogadro!
August 9, 1776

Happy Birthday Leo Fender! - Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.02 kB)
Happy Birthday Leo Fender!
August 10, 1981

The IBM PC Was Introduced to the World - Please click here to visit RF Cafe.
50 x 150 pixel graphic  (3.15 kB)
The IBM PC Was Introduced to the World
August 12, 1981

Happy Birthday Anders Ångström! - Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.69 kB)
Happy Birthday Anders Ångström!
August 13, 1814

The Code Talkers. Click here to return to the RF Cafe homepage.
50 x 150 pixel graphic  (2.66 kB)
National Code Talker's Day
August 14
Hugo Gernsback, born August 16, 1884 - RF Cafe
50 x 150 pixel graphic  (3.52 kB)
Hugo Gernsback's Birthday
August 14
Sony Released Its 1st Music CD-ROM - Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.84 kB)
Sony Released Its 1st Music CD-ROM
August 17, 1982

Happy Birthday Brook Taylor! - Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.65 kB)
Happy Birthday Brook Taylor!
August 18, 1685

Happy Birthday Philo T. Farnsworth! - Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.69 kB)
Happy Birthday Philo T. Farnsworth!
August 19, 1906

Hawaii Became the 50th State - Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.20 kB)
Hawaii Became the 50th State
August 21, 1958

1st Victrola Went on Sale - Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.07 kB)
1st Victrola Went on Sale
August 22, 1906

Gossamer Condor Wins Kremer Prize - Please click here to visit RF Cafe.
50 x 150 pixel graphic  (3.86 kB)
Gossamer Condor Wins Kremer Prize
August 23, 1977

France Detonated Its 1st Thermonuclear Bomb - Please click here to visit RF Cafe.
50 x 150 pixel graphic  (3.08 kB)
France Detonated Its 1st Thermonuclear Bomb
August 24, 1968

Happy Birthday Joshua Lionel Cowen! - Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.87 kB)
Happy Birthday Joshua Lionel Cowen!
August 25, 1880

Happy Birthday Lee De Forest! - Please click here to visit RF Cafe.
50 x 150 pixel graphic  (3.15 kB)
Happy Birthday Lee De Forest!
August 26, 1873

1st Edition of Scientific American Published - Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.67 kB)
1st Edition of Scientific American Published
August 28, 1845

Happy Birthday Ernest Rutherford! - Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.65 kB)
Happy Birthday Ernest Rutherford!
August 30, 1871

Happy Birthday Hermann Von Helmholtz! - Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.90 kB)
Happy Birthday Hermann Von Helmholtz!
August 31, 1821

September

Pioneer 11 Reaches Saturn - Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.79 kB)
Pioneer 11 Reaches Saturn
September 1, 1979

Happy Birthday Hiram Percy Maxim! - Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.80 kB)
Happy Birthday Hiram Percy Maxim!
September 2, 1869

1st Color Photos of Mars Taken by Viking Lander 2 - Please click here to visit RF Cafe.
50 x 150 pixel graphic  (3.09 kB)
1st Color Photos of Mars Taken by Viking Lander 2
September 3, 1976

Happy Birthday John Dalton! - Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.63 kB)
Happy Birthday John Dalton!
September 6, 1803

Happy Birthday David Packard! - Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.76 kB)
Happy Birthday David Packard!
September 7, 1912

Star Trek Debuted on NBC! - Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.74 kB)
Star Trek Debuted on NBC!
September 8, 1966

1st Computer Bug Discovered! - Please click here to visit RF Cafe.
50 x 150 pixel graphic  (3.07 kB)
1st Computer Bug Discovered!
September 9, 1945

Happy Birthday Arthur Compton! - Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.59 kB)
Happy Birthday Arthur Compton!
September 10, 1892

9-11 Heroes Medal of Valor. Click here to return to the RF Cafe homepage.
50 x 150 pixel graphic  (2.60 kB)
9-11 Heroes Medal of Valor
September 11, 2001

Jack Kilby Builds World's 1st IC - Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.80 kB)
Jack Kilby Builds World's 1st IC
September 12, 1958


Charles de Cisternay DuFay Born Today - Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.35 kB)
Charles de Cisternay DuFay Born Today
September 14, 1698

RCA Introduces the 12AX7 Tube - Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.14 kB)
RCA Introduces the 12AX7 Tube
September 15, 1947

Billy Durant Incorporated General Motors - Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.91 kB)
Billy Durant Incorporated General Motors
September 16, 1908

Space Shuttle Enterprise Debuts - Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.14 kB)
Space Shuttle Enterprise Debuts
September 17, 1976

The U.S. Army Army Force became the U.S. Air Force - Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.49 kB)
The U.S. Army Army Force became
the U.S. Air Force
September 18, 1947

1st Smiley Face Appeared on a Bulletin Board - Please click here to visit RF Cafe.
50 x 150 pixel graphic  (1.04 kB)
1st Smiley Face Appeared on a Bulletin Board
September 19, 1982

World's 1st Radio Newscast at KDKA - Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.53 kB)
World's 1st Radio Newscast at KDKA
September 20, 1921

Autumnal Equinox. Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.81 kB)

Autumnal Equinox. Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.69 kB)
Autumnal Equinox (1st day of Autumn/Fall)

TI Introduced the DATAMATH Series of Calculators - Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.75 kB)
TI Introduced the DATAMATH Series of Calculators
September 22, 1972

Robert Bosch Born Today - Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.99 kB)
Robert Bosch Born Today
September 23, 1861

USS Enterprise - World's 1st Nuclear-Powered Aircraft Carrier Launched - Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.77 kB)
USS Enterprise - World's 1st Nuclear-Powered Aircraft Carrier Launched
September 24, 1960

Collins Radio Company Incorporated - Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.58 kB)
Collins Radio Company Incorporated
September 25, 1933

Happy Birthday Seymour Cray! - Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.91 kB)
Happy Birthday Seymour Cray!
September 28, 1925

Happy Birthday Enrico Fermi! - Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.54 kB)
Happy Birthday Enrico Fermi!
September 29, 1901

Johannes (Hans) Wilhelm Geiger Born Today - Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.58 kB)
Johannes (Hans) Wilhelm Geiger Born Today
September 30, 1882

October

1st Ford Model T Built - Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.43 kB)
1st Ford Model T Built
October 1, 1908

Happy Birthday Peanuts!  Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.18 kB)
Happy Birthday Peanuts!
October 2, 1950

Transistor Patented by Shockley, Bardeen and Brattain - Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.85 kB)
Transistor Patented by
Shockley, Bardeen and Brattain
October 3, 1950

Sputnik. Click here to return to the RF Cafe homepage
50 x 150 pixel graphic  (3.03 kB)
Sputnik Launched - The Space Age Begins
October 4, 1957

Happy Birthday Robert Goddard! - Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.85 kB)
Happy Birthday Robert Goddard!
October 5, 1882

George Westinghouse Born Today - Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.50 kB)
George Westinghouse Born Today
October 6, 1846

Neils Bohr Born Today. Click here to return to the RF Cafe homepage.
50 x 150 pixel graphic  (2.57 kB)
Neils Bohr Born Today
October 7, 1885

Erie Canal Inaugurated. Click here to return to the RF Cafe homepage.
50 x 150 pixel graphic  (3.17 kB)
Erie Canal Inaugurated
October 8, 1823

U.S. Naval Academy Opened. Click here to return to the RF Cafe homepage.
50 x 150 pixel graphic  (2.40 kB)
U.S. Naval Academy Opened
October 10, 1845

Kathryn Sullivan Became 1st U.S. Woman Spacewalker. Click here to return to the RF Cafe homepage.
50 x 150 pixel graphic  (2.60 kB)
Kathryn Sullivan Became 1st U.S. Woman Spacewalker
October 11, 1984

Columbus Day. Click here to return to the RF Cafe homepage.
50 x 150 pixel graphic  (4.36 kB)
Columbus Day
2nd Monday in October

1st Cellular Service Launched.  Please click here to visit RF Cafe.
50 x 150 pixel graphic  (1.78 kB)
1st Cellular Service Launched
October 13, 1983

Chuck Yeager breaks the sound barrier.  Please click here to visit RF Cafe.
50 x 150 pixel graphic  (3.13 kB)
Chuck Yeager Breaks the Sound Barrier
October 14, 1947

Buon Compleanno, Evangelista Torricelli!  Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.63 kB)
Buon Compleanno, Evangelista Torricelli!
October 15, 1608

Radio Corporation of America Established.  Please click here to visit RF Cafe.
50 x 150 pixel graphic  (3.38 kB)
Radio Corporation of America Established
October 17, 1919

British Broadcasting Company Formed.  Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.96 kB)
British Broadcasting Company Formed
October 18, 1922

1st Commercial Wind Power at Grandpa's Knob, VT.  Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.10 kB)
1st Commercial Wind Power at Grandpa's Knob, VT
October 19, 1941

Alfred Nobel born today.  Please click here to visit RF Cafe.
50 x 150 pixel graphic  (1.85 kB)
Alfred Nobel Born
October 21, 1833

Princeton (College of NJ) Received Its Charter.  Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.15 kB)
Princeton (College of NJ) Received Its Charter
October 22, 1746

Today is Mole Day - 6.02 x10^23.  Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.92 kB)
Mole Day - 6:02 am to 6:02 pm on 10/23
October 23

Bulova Accutron 214 Introduced. Please click here to visit RF Cafe.
50 x 150 pixel graphic  (1.94 kB)
Bulova Accutron 214 Introduced - 1st Electronic Watch
October 25, 1960

Maiden flight of the P-51 Mustang.  Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.29 kB)
Maiden flight of the P-51 Mustang
October 26, 1940

KDKA Assigned Its Call Letters.  Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.15 kB)
KDKA Assigned Its Call Letters
October 27, 1940

Statue of Liberty (a gift from France) Was Dedicated.  Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.59 kB)
Statue of Liberty (a gift from France) Was Dedicated
October 28, 1886

The first mesage via ARPANET was supposed to be "LOGIN," but it crashed after just the "L" and the "O."  Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.92 kB)
1st Message Sent via the ARPANET
October 29, 1969

"The War of the Worlds" was broadcast.  Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.92 kB)
"The War of the Worlds" was broadcast.
October 30, 1938

Narinder Singh Kapany Born - "Father of Fiber Optics" -  Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.91 kB)
Narinder Singh Kapany Born
"Father of Fiber Optics"
October 31, 1927

November

Don't forget to reset you clock for Daylight Saving Time.  Please click here to visit RF Cafe
50 x 150 pixel graphic  (3.03 kB)
Daylight Saving Time
Begins 2nd Sunday in March
Ends 1st Sunday in November

1st Hydrogen Bomb Detonated.  Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.55 kB)
1st Hydrogen Bomb Detonated
November 1, 1952

Howard Hughes' Spruce Goose makes it's 1st and only flight.  Please click here to visit RF Cafe.
50 x 150 pixel graphic  (3.30 kB)
Spruce Goose's 1st and only flight
November 2, 1947

Happy Birthday Daniel Rutherford!  Please click here to visit RF Cafe.
50 x 150 pixel graphic  (3.30 kB)
Happy Birthday Daniel Rutherford!
November 3, 1749

Happy Birthday Benjamin F. Goodrich!  Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.13 kB)
Happy Birthday Benjamin F. Goodrich!
November 4, 1841

1st engineering college in U.S. - Rensselaer (RPI).  Please click here to visit RF Cafe.
50 x 150 pixel graphic  (3.81 kB)
1st engineering college in U.S. - Rensselaer (RPI)
November 5, 1824

Happy Birthday Marie Curie!  Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.91 kB)
Happy Birthday Marie Curie!
November 7, 1867

Happy Birthday Edmond Halley!  Please click here to visit RF Cafe.
50 x 150 pixel graphic  (3.30 kB)
Happy Birthday Edmond Halley!
November 8, 1656

Happy Birthday Carl Sagan!  Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.95 kB)
Happy Birthday Carl Sagan!
November 9, 1934

United States Marine Corps Established.  Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.14 kB)
United States Marine Corps Established
November 10, 1775

Veteran's Day - Honoring All Who Served.  Please click here to visit RF Cafe.
50 x 150 pixel graphic  (3.79 kB)
Veteran's Day - Honoring All Who Served
November 11

Happy Birthday Leo Baekeland!  Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.66 kB)
Happy Birthday Leo Baekeland
November 14, 1863

Intel Introduced the 4004 Microprocessor.  Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.85 kB)
Intel Introduced the 4004 Microprocessor
November 15, 1971

SETI's Arecibo Message Sent.  Please click here to visit RF Cafe.
50 x 150 pixel graphic  (3.89 kB)
SETI's Arecibo Message Sent
November 16, 1974

Alles Gute zum Geburtstag August Möbius August Möbius.  Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.78 kB)
Alles Gute zum Geburtstag August Möbius
November 17, 1790

Happy Birthday Alan Shepard.  Please click here to visit RF Cafe.
50 x 150 pixel graphic  (3.39 kB)
Happy Birthday Alan Shepard
November 18, 1923

Happy Birthday Eileen Collins!  Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.70 kB)
Happy Birthday Eileen Collins!
November 21, 1956

Microsoft Windows 1.0 Released.  Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.12 kB)
Microsoft Windows 1.0 Released
November 20, 1985

1st Untethered Manned Hot Air Balloon Flight.  Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.65 kB)
1st Untethered Manned Hot Air Balloon Flight
November 21, 1783

B2 Stealth Bomber Unveiled.  Please click here to visit RF Cafe.
50 x 150 pixel graphic  (3.13 kB)
B2 Stealth Bomber Unveiled
November 22, 1988

John Wallis - Mr. Infinity - born today.  Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.90 kB)
John Wallis - Mr. Infinity - born today
November 23, 1616

First Ad Appeared for a Wireless Telegraph Set.  Please click here to visit RF Cafe.
50 x 150 pixel graphic  (3.05 kB)
First Ad Appeared for a Wireless Telegraph Set
November 25, 1905

Happy Thanksgiving!  Please click here to visit RF Cafe.
50 x 150 pixel graphic  (4.36 kB)
Happy Thanksgiving
4th Thursday in November

Happy Birthday Konosuke Matsushita!  Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.29 kB)
Happy Birthday Konosuke Matsushita!
November 27, 1894

Happy Birthday Christian Doppler!  Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.61 kB)
Happy Birthday Christian Doppler!
November 29, 1803


50 x 150 pixel graphic  (3.46 kB)
Hanukkah
25th day of Kislev (late November to December)

December

Happy Birthday Martin Heinrich Klaproth.  Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.32 kB)
Happy Birthday Martin Heinrich Klaproth
December 1, 1743

1st Sustained Fission Reaction.  Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.85 kB)
1st Sustained Fission Reaction at Univ. of Chicago
December 2, 1942

Happy Birthday John Backus!  Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.35 kB)
Happy Birthday John Backus!
December 3, 1924

Happy Birthday Clyde Cessna!  Please click here to visit RF Cafe.
50 x 150 pixel graphic  (3.14 kB)
Happy Birthday Clyde Vernon Cessna!
December 5, 1879

Pearl Harbor Day.  Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.75 kB)
Pearl Harbor Day
December 7, 1941

Coaxial Cable Patent Day.  Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.66 kB)
Coaxial Cable Patent Day
December 8, 1931

Happy Birthday Grace Hopper!  Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.76 kB)
Happy Birthday Grace Hopper!
December 9, 1906

Happy Birthday Carl Gustav Jacob Jacobi!  Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.17 kB)
Happy Birthday Carl Gustav Jacob Jacobi!
December 10, 1804

Happy Birthday Sir David Brewster!  Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.32 kB)
Happy Birthday Sir David Brewster!
December 11, 1781

Marconi sent 1st transatlantic radio message: dit, dit, dit.  Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.66 kB)
Marconi sent 1st transatlantic radio message
dit, dit, dit (•••, the letter "s")
December 12, 1901

Happy Birthday Ernst Werner von Siemens.  Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.57 kB)
Happy Birthday Ernst Werner von Siemens
December 13, 1816

Happy Birthday Tycho Brahe.  Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.54 kB)
Happy Birthday Tycho Brahe!
December 14, 1546

Happy Birthday Gustav Eiffel!  Please click here to visit RF Cafe.
50 x 150 pixel graphic  (3.07 kB)
Happy Birthday Gustav Eiffel!
December 15, 1832

World's 1st Transistor Invented.  Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.03 kB)
World's 1st Transistor Invented
December 16, 1947

Battle of the Bulge.  Please click here to visit RF Cafe.
50 x 150 pixel graphic  (4.03 kB)
Battle of the Bulge
December 16, 1944

Anniversary of Powered Flight - the Wright Brothers.  Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.70 kB)
Anniversary of Powered Flight
December 17, 1903

Edwin Armstrong - Invented frequency modulation, superheterodyne & regenerative receivers.  Please click here to visit RF Cafe.
50 x 150 pixel graphic  (3.78 kB)
Happy Birthday Edwin Armstrong!
Born December 18, 1890

SCORE Satellite Launched.  Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.36 kB)
SCORE Satellite Launched
December 19, 1958

Robert Van de Graaff.  Please click here to visit RF Cafe.
50 x 150 pixel graphic  (3.28 kB)
Robert Van de Graaff
Born December 20, 1901

Winter Solstice.  Please click here to visit RF Cafe
50 x 150 pixel graphic  (3.41 kB)
Winter Solstice (1st day of winter)

SR-71 Blackbird Maiden Flight.  Please click here to visit RF Cafe
50 x 150 pixel graphic  (2.96 kB)
SR-71 Blackbird Maiden Flight
December 22, 1964

1st Manned Orbit of the Moon by Apollo 8.  Please click here to visit RF Cafe
50 x 150 pixel graphic  (2.43 kB)
1st Manned Orbit of the Moon by Apollo 8
December 23, 1968

Happy Birthday James Joule!  Please click here to visit RF Cafe
50 x 150 pixel graphic  (2.61 kB)
Happy Birthday James Joule!
Born December 24, 1818Merry Christmas! Joyeux Noël! Frohe Weihnachten! Buon Natale! Feliz Navidad! веселое рождество! Καλά Χριστούγεννα! メリークリスマス! 圣诞快乐! عيد ميلاد سعيد!   Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.67 kB)
Merry Christmas!  Joyeux Noël!
Frohe Weihnachten!  Buon Natale!  Feliz Navidad!
веселое рождество!  Καλά Χριστούγεννα!;!
メリークリスマス!  圣诞快乐!  عيد ميلاد سعيد!
December 25

Happy Birthday Charles Babbage!  Please click here to visit RF Cafe
50 x 150 pixel graphic  (2.73 kB)
Happy Birthday Charles Babbage!
Born December 26, 1791

Happy Birthday Clemens Winkler! Click here to return to the RF Cafe homepage.
50 x 150 pixel graphic  (2.38 kB)
Happy Birthday Clemens Winkler!
December 26, 1838

Happy Birthday Johannes Kepler!  Please click here to visit RF Cafe
50 x 150 pixel graphic  (2.88 kB)
Happy Birthday Johannes Kepler!
Born December 27, 1571

Admiral Sold the 1st Color Television Set.  Please click here to visit RF Cafe
50 x 150 pixel graphic  (2.51 kB)
Admiral Sold the 1st Color Television Set
Born December 30, 1953

Last Calvin and Hobbes comic strip.  Please click here to visit RF Cafe.
50 x 150 pixel graphic  (2.12 kB)
Last Calvin and Hobbes Comic Strip
December 31, 1995


Please click here to visit RF Cafe

A Disruptive Web Presence

Custom Search
Over 10,000 pages indexed! (none duped or pirated)

Read About RF Cafe
Webmaster: Kirt Blattenberger
    KB3UON

RF Cafe Software

RF Cascade Workbook
RF Cascade Workbook is a very extensive system cascaded component Excel workbook that includes the standard Gain, NF, IP2, IP3, Psat calculations, input & output VSWR, noise BW, min/max tolerance, DC power cauculations, graphing of all RF parameters, and has a graphical block diagram tool. An extensive User's Guide is also included. - Only $35.
RF system analysis including
frequency conversion & filters

RF & EE Symbols Word
RF Stencils for Visio

Product & Service Directory
Personally Selected Manufacturers
RF Cafe T-Shirts & Mugs

RF Cafe Software

Calculator Workbook
RF Workbench
Smith Chart™ for Visio
Smith Chart™ for Excel
Your RF Cafe Progenitor & Webmaster
Click here to read about RF CafeKirt Blattenberger... single-handedly redefining what an
                                 engineering website should be.

View the YouTube RF Cafe Intro Video Carpe Diem! (Seize the Day!)

5CCG (5th MOB): My USAF radar shop

Airplanes and Rockets: My personal hobby website

Equine Kingdom: My daughter Sally's horse riding website