Custom Search
Over 10000 Pages Indexed
Your Host
Click here to read about RF CafeKirt

... single-
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

Hobby & Fun

Airplanes and Rockets:
My personal hobby website

Equine Kingdom:
My daughter Sally's horse
riding business website -
lots of info

•−•  ••−•    −•−•  •−  ••−•  •
RF Cafe Morse Code >Hear It<

Job Board

About RF Cafe©

RF Cafe E-Mail

Homepage Archive July 2014

These archive pages are provided in order to make it easier for you to find items that you remember seeing on the RF Cafe homepage. Of course probably the easiest way to find anything on the website is to use the Google Search box in the upper left corner of every page
Homepage Archive Pages
1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13
2013:  Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec

2014:  Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec











Electronics Themed Comics

Electronics Themed Comics, September 1945 & December 1947 Radio Craft - RF CafeHere are a few more comics from magazines of the days of yore. It is rare to find a comic in a technical or hobby magazine these days. I don't know why that is. Enjoy.

Rosenberger Micro-RF Test
Switch Connector by RFMW

RFMW Announces Design and Sales Support for Rosenberger's Micro-RF Test Switch Connector - RF CafeRFMW, Ltd. announces design and sales support for Rosenberger’s 15K101-40ME4 Micro-RF test switch connector. The 15K101-40ME4 Micro-RF test switch is an ultra-miniature (1.8 mm x 1.9 mm, height 1.5 mm), low-cost, surface mount, coax "switch" connector for the verification of antenna/circuit performance in any kind of small device. The connector can be used for applications that require a low-cost, SMD, coax, point-of-entry to a PCB and/or a switch for temporarily disconnecting the on-board...

A Decibel Nomograph

A Decibel Nomograph for Voltage, September 1945, Radio Craft - RF CafeYes, it's another nomograph. This one is for calculating the number of decibels required to amplify or attenuate a voltage level. The chart came from a 1945 edition of Hugo Gernsback's Radio Craft magazine, but decibels are still defined today the way they were nearly 70 years ago. A hard copy of a nomograph residing in a notebook or on the wall is still a handy tool when you need to do a quick calculation. Unless you have a voice-commanded app where Siri will instantly respond with a conversion for you, printing out one of these nomographs might be a really handy aid...

Research at the Threshold
of Space

Research at the Threshold of Space, May 1957 Radio & TV News - RF CafeAtmospheric scientists suspected as recently as early 1957 that Earth's upper atmosphere (ionosphere and beyond) temperature might be around 1,000° K. I say 'suspected' because we had not yet launched instruments there to make actual measurements. Soundly posited and agreed upon theory was validated a short time later when sounding rockets reliably reported a maximum of about 1,300° K in the upper ionosphere. We did not know for sure what electromagnetic wavelengths and their respective energy densities would be outside the protective layers of gases encompassing Earth. Much more was known about the depths of the planet's oceans than of its atmosphere. Scientists knew that life was abundant...

Anatech July 2014 Newsletter

Anatech Electronics Newsletter for July 2014 - RF CafeAnatech Electronics, a manufacturer of RF and microwave filters, has published its July 2014 newsletter. As always, it includes both company news and some tidbits about relevant industry events, regulations, and standards. This month, Sam Benzacar offers his views on the subjects of power line EMF exposure, microwave device market growth, LTE TV, GM's LTE in-automobile hot-spot, and switching consciousness on and off. He also has a short article titled, "Curing Interference: Never Too Late."

Career News & Tips

Career and Job Hunting Advice for July 23, 2014 - RF CafeIt's time for another round of job hunting and career advice stories. There is no limit to the amount of advice offered by helpful 'experts.' Many of these particular bits of guidance for your life come from authors on LinkedIn, Monster, Money, etc., which typically do have good content. Considering, however, the quality of helpful suggestions offered by your friends and acquaintances in the real world, it would be wise to learn a little about the source before potentially risking your future.

- Refresh Your Retro Resume
   in 6 Steps
- Interview Take-Along
- 5 Words to Avoid Saying
   During a Job Interview
- Top 10 Tips for Salary
   Negotiations - more... 

Thanks Once Again to
ATEC for Support!

Advanced Test Equipment RentalsAdvanced Test Equipment Rentals provides the latest models of test and measurement equipment from top name manufacturers like Advanced Test Equipment Rentals Company PhotoAgilent, Fluke, Anritsu, R&S, Tektronix, and Yokogawa. Our primary focus is providing a complete rental solution of test and measurement equipment to industries such as aerospace, defense, EMC, and communications.

Chalco Paper Tape Reader
Restoration by Mark Blair

Chalco Paper Tape Reader in TPN-19 (Mark J. Blair) - RF Cafe RF Cafe visitor Mark J. Blair (NF6X) wrote to let me know about the Chalco Paper Tape Reader that he procured and restored. The Chalco unit was used in the TPN-19 ground-based mobile airport surveillance and precision approach radar. Mark would appreciate being contacted by someone who actually worked with the reader on the TPN-19. Mark has a very interesting website that you might enjoy. Says he, "I like to collect, restore and play with military surplus equipment, and that's mostly what this web site is all about."

Featured Book:
Finance for Engineers

Finance for Engineers: Featured Book - RF CafeFinance for Engineers: Evaluation and Funding of Capital Projects, by Frank Crundwell. I saw this book over on the EE Times website and figured it would be a good subject for my Featured Book spot. With flair and an originality of approach, Crundwell brings his considerable experience to bear on this crucial topic. Uniquely, this book discusses the technical and financial aspects of decision-making in engineering and demonstrates these through case studies. It's a hugely important matter as, of course, engineering solutions and financial decisions...

Unlocking the Mysteries
of Radar - AOC Webinar

Unlocking the Mysteries of Radar (AOC webinar) - RF CafeWhen: TODAY, July 22 from 4-5 pm EDT.
Cost: FREE.
There is still time and space available to register for this afternoon's webinar presented by Fernando C Gonzalez. This interactive journey, from the humble electron all the way up to the self-driving car, explores sound and light, size, wavelength and frequency. Overview of the history and evolution of radar. From the origins of radar prior to WWII, through pulse Doppler, CW, monopulse radars, and to modern active electronically scanned arrays (AESA), the attendee will understand the fundamentals of how radars work. A 10-15 minute Q&A follows.

National Union Radio Corp. Ad
- Women Engineers Needed

National Union Radio Corporation Ad, April 1945, Radio Craft - RF CafeNational Union Radio Corporation was ahead of its time in terms of hiring women engineers. Admittedly, they and all other manufacturers were dealing with a shortage of male engineers due to the ongoing need by the military for fending off the scourges of fascism, Nazism, communism, socialism, and all the other 'isms' of the day that threatened to overtake the world. However, they should receive due credit for going out of the way to promote the sciences as careers for the fairer gender. The advertised positions required the successful applicant to have earned a bona fide degree in physics, electrical engineering, chemical engineering...

Notable Tech Quote

Dr. Robert Goddard (NASA image) - RF Cafe Notable Quote"It is difficult to say what is impossible, for the dream of yesterday is the hope of today and the reality of tomorrow." - Dr. Robert Hutchings Goddard

Carl & Jerry: Tussle
with a Tachometer

Carl & Jerry: Tussle with a Tachometer, July 1960 Popular Electronics - RF CafeThis is a great example of how Popular Electronics and John T. Frye used the "Carl & Jerry" series to teach some basic electronics design principles through story telling. In this adventure, the guys decide to build a tachometer from schematics they found in a magazine. They debate amongst themselves how the circuits works, the best way to assemble the circuit, component selection, vibration- tolerant mounting, and how to properly calibrate the tach to accurately display engine revolutions per minute.

NI's Analyst Update Reduces
Simulation Times Up to 70%

Analyst Update in NI AWR Design Environment V11.01 Dramatically Reduces Simulation Times – Up to 70 Percent - RF CafeNI (formerly AWR Corporation) has released V11.01 of the NI AWR Design Environment™ with enhancements to Analyst™ 3D FEM EM simulation engine that cuts simulation times by as much as 70% over previous versions. The updates in V11.01, which are specific to Analyst, include algorithm reformulations/enhancements to both automatic mesh refinement (AMR) and fast frequency sweeps. For high-port-count designs (10+ ports), the speed improvements seen with Analyst are the most pronounced...

Newly Announced K-1B Visa
for High Tech Workers

Newly Announced K-1B High-Tech Worker Visa Program - RF CafeSomeone had to take the initiative to launch an improved high-tech immigrant worker program. Accordingly, I took the liberty of creating a K-1B Visa for high technology workers. Congress has not officially written it into law, but American politicians and executives make no pretense of enforcing law they disagree with anymore, so it really does not matter. Here is how the K-1B Visa program works: It is widely known that the United States now considers itself to be a country without a southern border. All anyone needs to do to become an accepted American citizen (the new definition, not the old) and enjoy all the freedoms guaranteed by our Constitution (well, except the parts...

Dave's & Bill's Garage
Restoration (HP Beginnings)

HP Garage Restoration Project - RF CafeEven though you would never know by today's Hewlett Packard (HP), the company's roots are in electronics test equipment (never thought I might have to explain that!). Most people who have been in the electronics realm are familiar with the story of Dave Packard and Bill Hewlett starting their business in the 12'x18' single-car garage where Dave and his wife lived at 367 Addison Avenue in Palo Alto, California. Bill, yet a bachelor, moved into the garage in 1938 (an early entrepreneurial engineer trend setter who literally lived in his office). Their first commercial product was the Model 200A Audio Oscillator. Hewlett Packard went on to become the world's foremost maker of electronic test equipment for communications, medical, basic research...

TV DXing, and the
Dog on the Roof

TV DXing, and the Dog on the Roof - RF CafeBecause I was born in 1951, I grew up without the benefit of 1,000 cable channels available whenever I wanted them. This was during the 1950s and 1960s when we lived in the city of Pittsburgh, PA. Instead we had to make due with four - that is four - VHF television stations that we could receive on a black and white TV (actually it wasn't strictly BLACK and WHITE; there were various shades of gray). There was one TV station for each network: CBS, ABC, and NBC, plus one 'Educational' (PBS) station. Later on, we got two independent UHF stations. This was also the era when the 'blackout rule' was largely in effect for sports broadcasts, and if you didn't go to the stadium for a home game... 

Please Visit PMI in Appreciation
of Their Ongoing Support

Planar Monolithics (PMI)PMI's organization has been setup to design, develop, manufacture, test, and market complex state-of-the-art PMI - LNAhybrid RF MIC and MMIC components, supercomponents, and subsystems. Unique products PMI - limiterfor applications in space, military, commercial, telecommunications, and consumer electronics systems. DC to 40 GHz.

Empower RF Awarded Patent for "Broadband Linearization..."

Empower RF Systems Awarded Patent for "Broadband Linearization Module and Method" - RF CafeEmpower RF Systems is proud to announce the approval of a patent on "Broadband linearization module and method." New communication services and the use of complex waveforms have created a demand for highly linearized power amplifiers. Deviations from linearity show up as spectral distortions and/or modulation quality degradation (EVM) in the output of these amplifiers -that is, undesired energy, not contained in the original signal, inside or outside...

Apollo 11's 45th
Anniversary Crossword Puzzle

Apollo 11's 45t Anniversary Crossword Puzzle for July 20, 2014 - RF Cafe"Houston… tranquility base here. The Eagle has landed." Where were you 45 years ago when you heard on radio watched on a B&W TV like I did as Apollo 11's 'Eagle' lunar module touched down on the moon - with Apollo 11 mission patch (NASA image) - RF Cafeless than 30 seconds of fuel remaining? A short while later Neil Armstrong and Buzz Aldrin became humans #1 and #2, respectively, to step onto the lunar surface. "We came in peace for all mankind," was plaque attached to the part of the lunar lander that stayed behind. Poor Michael Collins had to be content with orbiting the moon while is shipmates went to the surface. I created this special crossword puzzle this morning to commemorate the Apollo 11 mission...

Transistor Dictionary

Transistor Dictionary, May 1958 Radio-Electronics - RF CafeA few new terms have been added to the transistor lexicon since 1958, but this list from Radio-Electronics magazine contains more than 150 definitions that are still useful today. It is amazing that this list was created just a decade after the transistor was invented, and now half a century later the mot commonly used terms have not changed much. In looking over the words, there are very few that need to be added to the original (which I did).

Custom Interconnects 40 GHz
Test Reports for Fuzz Button

Custom Interconnects Announces Release of New 40 GHz Test Reports for Fuzz Buttons® - RF CafeCustom Interconnects announced the release of the most detailed RF characterization conducted to-date on their flagship Fuzz Button® technology platform. The reports are geared towards 50 Ohm impedance matching at high frequencies and include bandwidth measurements, S-parameters and VSWR, as well as SPICE Models. The reports were released as a follow-up to the recent IEEE IMS held in Tampa and are expected to draw a great deal of interest from the RF design community who were eagerly awaiting their arrival...

Many Thanks to MECA
Electronics' Ongoing Support

MECA ElectronicsSince 1961, MECA has served the microwave industry specific to passive components in the DC to 20 GHz frequency range. MECA Electronics D.A.S. equipmentMECA serves all areas of the RF / Microwave industries including world class network providers, and supporting supply chain infrastructure. We have long been the "backbone" of high performance wired and air-interfaced networks such as in-building, satellite, radar, and mobile communications.

News from the IRE 1958 Meet

News from the IRE 1958 Meet, June 1958 Radio-Electronics - RF CafeThe International Microwave Symposium (IMS) is arguably the largest single annual event for radio and microwave engineers. According to IMS2014 event officials the show in Tampa, Florida, boasted of a 7,500-visitor attendance. European Microwave Week (EuMW) runs a close second place at around 7,000. In 1958, 55,000 engineers attended the Institute of Radio Engineers (IRE - eventually became the IEEE) in New York City. IMS and EuMW would love to have numbers like anywhere near that. Maybe the large number of attendees was because dissemination of information was not nearly as instant (or eventual for that matter), and the absence of the Internet or...

Raytheon Radio Tubes Ad

Raytheon Radio Tubes Ad, September 1942 Radio Retailing Today - RF CafeI love these old electronics company advertisements from the World War II era. It represented a time when minor differences between citizens were put aside for the good of the country (yours and mine). Nationalism had not yet been redefined by one-worlders to mean that you hated the rest of the world, but rather that you had pride in your country of birth - or legally adopted new country - and were willing to sacrifice for the common good to preserve your way of life. The U.S. and Great Britain were indisputably the leaders in technical invention amongst the Allied powers. Germany and Japan led...

BeRex Adds New Family of High
Performance MESFET Chips

BeRex Adds New Family of High Performance MESFET Chips - RF CafeBeRex, Inc. has begun shipping a new family of GaAs MESFET chips, the BCF-series, which addresses the need for low phase noise with high gain and power in applications such as single and multi-stage amplifiers, oscillators, synthesizers, etc. ranging in frequency from DC to 26.5 GHz. The BeRex BCF-series of MESFET chips are ideally suited both broad band and narrow band applications from DC to 26.5 GHz. Typical application requires a high level of OIP3 linearity...

How to Use Radio
Propagation Predictions

How to Use Radio Propagation Predictions, December 1947 Radio Craft - RF CafeShort wave radio was a boon to both professional and amateur radio operators because of its ability to be received over longer distances using significantly lower transmitter power. The problem was (and still is) that short wave bands typically suffer from atmospheric ionization effects that vary depending on time of day, local weather, solar activity, pollution, and other phenomena. Long wave's advantage was that although it required higher power and longer antennas, it was (and is) extremely reliable. For other than the most critical applications, idiosyncrasies of short wave communications were accepted as the price of more convenient and lower cost operation. Widespread adoption of short wave communications brought extensive studies and characterization...

MECA Low PIM Components
& D.A.S. Equipment Catalog

MECA Electronics Intros New Low PIM Components & D.A.S. Equipment Catalog - RF CafeMECA* Electronics' new 12-page catalog features many our extensive line of low PIM RF/microwave components with industry leading performance including RF loads, attenuators, directional couplers, power splitters, divider/tappers, adapters, jumpers and D.A.S. equipment.
* Microwave Electronic Components of America

Top U.S. Defense Contractors
in 2014

Top U.S. Defense Contractors in 2014 - RF CafeWashington Technology magazine just published its 2014 ranking list for the top 100 defense contractors based on the value of contract dollars*. It should come as no surprise that Lockheed Martin leads the pack ($10.4B) by a factor of nearly two over the runner-up Northrop Grumman ($5.87B). My Top 10 list below has the companies listed by value of defense contracts, whereas the original list ranked by total dollar value inclusive of both defense and non-defense contracts. Two companies in the list, Leidos (security) and Fluor (construction), are unfamiliar to me. The other eight design and manufacture a mixture of electronic, mechanical, and software products for military and aerospace customers. The CBO reports that defense spending...

Radio Frequency System
Architecture and Design

Radio Frequency System Architecture and Design - RF CafeRadio Frequency System Architecture and Design, by John W. M. Rogers, Calvin Plett, and Ian Marsland. Communication devices such as smart phones, GPS systems, and Bluetooth, are now part of our daily lives more than ever before. As our communication equipment becomes more sophisticated, so do the radios and other hardware required to enable that technology. Common radio architectures are required to make this technology work seamlessly. This resource describes practical aspects of radio frequency communications systems design...

Dilbert CEO Photo Flash
Advertisement Idea

Dilbert CEO Photo Flash Advertisement Idea (Universal Uclick image) - RF CafeThe July 15, 2014, Dilbert comic strip features the CEO of his company suggesting that they figure out a way to insert ad images into "that little spot" that stays in your vision for a few seconds after someone takes your picture using a camera flash. I wonder whether creator Scott Adams realizes that he might have come up with a patentable idea? Too late. By now the folks at Google or Apple have seen today's strip and have their staff patent lawyers frantically generating applications as I write this. Subliminal advertising has been around for a long time, and it might even be illegal in some countries, but it is not illegal... 


A Disruptive Web Presence

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

Read About RF Cafe
Webmaster: Kirt Blattenberger

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