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Homepage Archive December 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 at the top 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


Here is page 1 of the December 2014 homepage archive














RCA Victor Model M-70 Auto
Radio Service Data Sheet

RCA Victor Model M-70 2-Unit Auto-Radio (Chassis No. RC-394) Radio Service Data Sheet, August 1939 Radio Craft - RF CafeThis Radio Service Data Sheet is from the series published by Radio-Craft magazine in the 1920s and 1930s. I am posting them for the benefit of people who restore those vintage models to working order. It is still possible to buy Sam's Photofacts packages that include schematics and alignment data, but these info sheets fill the gap for ones either not available, or for someone needing to get a feeling for what he/she is up against before making a full commitment to the task

Pasternack Introduces New
RF Combiners up to 6 GHz

Pasternack Introduces New RF Combiners Operating up to 6 GHz - RF CafePasternack Enterprises introduces a completely new line of broadband RF power combiners. The broad bandwidth of these new combiners makes them the perfect complement to systems using components such as power amplifiers, antenna feeds, attenuators and switches. A special area of usage for these power combiners is in combining individual power amplifiers together into a large power block in an amplifier system. The new RF power combiners from Pasternack are offered in the popular 2-way

Sage Career Advice

Engineering Career News & Tips for December 19, 2014 (openclipart.org) - RF CafeFor a lot of people this will be the last work day of the year as we head into the final weekend before Christmas. If you have been thinking about finding a different means of income in 2015, or just want to make your current situation better, rest assured there is plenty of advice for you on how to do either. Rules, methods, and expectations have changed considerably in the last few years, especially as benefits packages have changed in a lot of cases in order to align with ever-changing government regulations. Good luck in whatever your plans happen to be. Here are a few contemporary articles to assist you in your endeavors.

- How to Throw a Great Office
   Holiday Party
- Surprising Health Problems
   that Come from Working
   Too Hard
- Mistakes Job Seekers Just
   Can't Make   <more>

NIST Builds LEGO Watt Balance
to Measure Planck's Constant

NIST physicists build a watt balance using LEGO blocks to measure Planck’s constant - RF CafeLEGO blocks have been used to model everything from ancient Roman ruins to famous people to turbine jet engines. Robots, Babbage's difference machine, and 3-D printers have been made from them. LEGO has reaped a much-deserved windfall in profits the last couple decades as artists and techies have adopted the inexpensive plastic building units for use in professional qualify presentations and objects. Now, physicists at the National Institute of Standards and Technology (NIST) have built a practical Watt balance instrument from LEGOs that measures Planck's constant. The full paper is available on Cornell University's arXiv.org (pronounced "archive")website.

Skyworks Intros Varactor Diode
for Auto, Consumer, Defense

Skyworks Introduces Varactor Diode for Automotive, Consumer, Defense, and Infrastructure - RF CafeSkyworks Solutions introduces a hyperabrupt junction tuning varactor diode for automotive, consumer, defense, and infrastructure markets. The SMV1275-079LF offers high capacitance ratio and low series resistance ideal for low phase noise, UHF, and VHF voltage-controlled oscillators, voltage-tuned phase shifters, tunable bandpass filters, and microwave tuners (at frequencies up to and above 2.5 GHz). The new diode is offered in a small 1.5 x 0.7 x 0.5 mm package.

RF & Microwave Reading for
December 18, 2014

RF & Microwave Engineering Articles for December 18, 2014 - RF CafeThere's that IoT (Internet of Things) buzz phrase again. Perhaps it is getting tiresome because even after being around for about two years, almost nobody really knows what it refers to. Many never remember even having heard of it. Have you? Do you know what is means? Join the crowd. IPV6 was created to handle all the billions and billions of connected appliances and wearable devices we'll all own and/or wear in near future. This first article in Microwave Journal presents a brief introduction to IoT, in case you care.

- Internet of Things Focus,
   M. Ouzillou, R. Yu
- The Evolution of Harmonic
   Load Pull, Dr. I. Tsironis
- Software-Designed Instrument
   Revolution (p.22) B. Driver,
                       V. Fernandez
- Simulate and Test Chirped
   Radar - It's Not Just for the
   Military Anymore, F. Raffaeli,
                 T. Nguyen  <more>

Z-Comm Intros Low Noise VCO
for Low Cost Basestations

Z-Comm Intros Low Noise VCO for Low Cost Basestations - RF CafeZ-Communications, Inc. announces a new RoHS compliant VCO model CRO2273B-LF. The CRO2273B-LF operates at 2265 to 2280 MHz with a tuning voltage range of 0.5 to 4.5 Vdc. This high performance VCO features a spectrally clean signal of -115 dBc/Hz @ 10 kHz offset and covers the band with a typical tuning sensitivity of 4 MHz/V. The CRO2273B-LF is designed to deliver +3 dBm of nominal output power into a 50Ω load while operating off a 5 Vdc supply and drawing typically 20 mA of current. This low noise

Army Radio Communications

Army Radio Communications, May 1945 Radio Craft - RF Cafe

Seamless integration of wireless communications with wired communications has not always been a yawn in technical strategy discussions. It has really only been since the early 1990s with the introduction of ubiquitous cellphone systems that someone on a wireless device could connect directly with a wired (i.e., landline) contact and not need an intermediary operator to facilitate. Some military systems, the Inmarsat system and a few other proprietary systems were available, but not to the public at large. This article reports on some of the Army's early attempts at implementing wireless-to-wired communications. Unlike present day systems that rely heavily

ET Industries Intros
10-50 GHz Power Divider

ET Industries Intros 10-50 GHz Power Divider - RF CafeET Industries is a leader in the design of high frequency, wideband Power Dividers. Model D-1050-2 is a 2 way power divider spanning 10-50 GHz. The maximum insertion loss is less than 1.80 dB. Amplitude balance is 0.5db maximum and phase balance is 5 degrees maximum. The minimum isolation is 16 dB and VSWR is 1.70:1 maximum. Connectors are 2.4 mm female. Housing size is 1.15" x 1.06" x 0.5".

Nothing Says "It's Christmas"
Like an Iotatronized LED Tree

Velleman MK130 3D Xmas Tree - RF CafeFor a mere $10 you can own this iotatronized, blinking LED Christmas tree for wow your co-workers. It comes as a kit and needs a 9V iotatron battery to act as both the power supply and a weighted base. Velleman has a lot of simple, inexpensive, build it yourself electronic kits. Hurry - there are only seven shopping days left 'til Christmas!

Court-Appointed Experts:
The Future of Litigation?

Court-Appointed Experts: The Future of Litigation? IMS ExpertServices - RF CafeThe good folks at IMS ExpertServices have published an interesting short article highlighting the increasingly difficult technical issues being brought before courts in intellectual property (IP) cases, Court-Appointed Experts: The Future of Litigation? - RF Cafeand an inability by judges to render informed opinions based on evidence presented. Attorney Ryan Thompson addresses the issue in a case involving Silk Road and its use of Bitcoin payments to remain 'under the radar' of law enforcement for nearly two years. While there are some amazingly intelligent jurists in the courts, expecting any one person to possess enough knowledge of both law and the subject at hand (a circuit design, software code, a rocket engine fuel injector, an automotive braking

Anatech Electronics'
December 2014 Newsletter

Anatech Electronics Newsletter for December 2014 - RF CafeAnatech Electronics, a manufacturer of RF and microwave filters, has published its December 2014 newsletter. As always, it includes both company news and some tidbits about relevant industry happenings. This month, Sam Benzacar looks into his crystal ball and dares to predict the RF / microwave market's future for defense, the wireless industry, the Internet of Things (IoT), Wi-Fi, and industry, medical, and scientific applications in 2015. Sam has been in the business of designing and selling filters for all these industries for a long

Transistor Invention
Announced 67 Years Ago Today

Transistor Trends: 67th Birthday, May 1958 Radio-Electronics - RF CafeIf you are reading this, then chances are you owe a part of your livelihood to three gentlemen by the names of Bardeen, Brattain and Shockley. On this day 66 years ago the trio announced their discovery of a gain producing semiconductor device that they dubbed a 'transistor' due to its dual nature as a transconductance amplifier and a variable resistance. This article by magazine editor Hugo Gernsback, in celebrating the 10-year anniversary of the transistor, mentions that somewhere in the neighborhood of 30 million of the little miracle components would be sold that year. The microprocessor in the device you are using to read this contains more than a billion. By comparison, the 'primitive' year-2000-vintage Intel Pentium 4 itself integrated

Notable Tech Quote

War Comes, January 1942 QST - RF Cafe"...Nature is no respecter of military emergencies." - K.B. Warner, W1EH, in the January 1942 issue of QST magazine, regarding the Federal Communication Commission (FCC) decree suspending indefinitely all amateur radio activities in the U.S. following the December 7, 1941 attack on Pearl Harbor. Read the complete "War Comes!" article.


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