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Homepage Archive October 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

Please click here to view May 2014 homepage archive page 1.

 

 

 

 

 

Scanning Electron Microscope for Radio Engineers

New Scanning Electron Microscope Revealed to Radio Engineers, September 1942, Radio Craft - RF CafeTelevision and radio facsimile machine electronics technology was credited for aiding in the development of a new type of scanning electron microscope (SEM) that could image the surface of opaque object to a resolution of 100 Å. The television contribution part of the technology was precisely controlling a raster path for the electron beam. The facsimile part is the knowledge of how to assemble a printed image from streaming data. It is interesting to note that in order for an object to be imaged via SEM, its surface must be electrically conductive. Accordingly, non-metallic ...

Vintage Radio Schematics & Parts Lists

Vintage Radio Schematics & Parts Lists - RF CafeHere are another half dozen sets of schematics and parts lists for vintage radio sets. These are being posted for the sake of the relatively few hobbyists who still take on the challenge of restoring these old relics of yesteryear. I've finally resumed work on my Crosley 03CB console cabinet radio. My nostrils are filled with 70+ year old walnut wood dust from doing the final sanding in preparation for staining and polyurethaning.

Test Equipment Crossword Puzzle

Test Equipment Crossword Puzzle for October 19, 2014 - RF CafeThis week's engineering crossword puzzle has a theme of test equipment. The four longest words are types of test equipment, and a few of the other are as well (or related to test equipment). All the other words are from my hand-selected library of a couple thousand terms related to engineering, science, mathematics, etc. Enjoy!

I Have a Few Questions About Ebola

I Have a Few Questions About Ebola - RF CafeI listen to a fair amount of radio and read news headlines throughout the day, so I have heard and read a lot about the lurking Ebola epidemic. Like most RF Cafe visitors, I am at least as informed on topics like viruses as the average citizen of the world. We know that there is no 'cure' for a virus per se, just a possibility that it can be subdued by disrupting its ability to replicate. Unlike bacteria which are cellular and have their own support system, viruses require the metabolic mechanisms of a host in order to ...

Foreign Broadcast Intelligence Service

Foreign Broadcast Intelligence Service, January 1945 Radio News - RF CafeYou will not find the name Central Intelligence Agency (CIA) mentioned anywhere in this WWII era story reporting on the activities of the Foreign Broadcast Intelligence Service, but it was then and is now a branch of the CIA. Per the CIA website "For nearly 70 years, the Foreign Broadcast Information Service (FBIS) monitored the world's airwaves and other news outlets, transcribing and translating selected contents into English and in the process creating a multi-million page historical archive of the global news media." Equally surprising is that the BBC ...

American Amphenol Tube Socket Wall Chart

American Amphenol Tube Socket Chart, January 1945 Radio News - RF CafeEarlier this week I posted a page pointing to the many laboratory wall charts offered by Keysight Technologies. I mentioned how unlike modern charts that are full of color, the old ones were usually a single color or black & white. Here is an example from American Amphenol in the mid 1940s. Something like this would make a really cool decoration for today. I just looked on eBay and didn't see an Amphenol Tube Socket Wall Chart for sale, but that would probably be the bet place to latch on to one eventually. 

Hewlett Packard Archive Website

Hewlett Packard Archive Website - RF CafeWebsite contributor Joe Cahak reminded me of the Hewlett Packard Archive website that is absolutely the go-to source for vintage HP documents. According to the site's owner, Glenn Robb, there are more than 35,000 pages of Hewlett Packard catalogs, Bench Briefs, product manuals, service notes, Watt's Current, price lists, periodicals (Measure and Insight magazines), journals, presentations, HP Test and Measurement News, seminars, application notes, and much more ...

Inventor Testimony in Patent Litigation

Regression Analysis in Litigation, by IMS ExpertServices - RF CafeAttorney Joshua Fruchter, Esq., has posted an article that made me think about how to a large extent the practice of law is a lot like writing HTML code for a web page. Think of a lawyer as a programmer who writes his HTML code to produce a specific output for a specific input. Codified law is analogous to the HTML specification as published by the W3C. The judge and/or jury is equivalent to the browser creator. As we all are painfully aware, even relatively simple web page code can end up displaying vastly differently on not just browsers from various manufacturers (Chrome, IE, Firefox, Safari, ... 

New RF & Microwave Magazine Articles

New RF & Microwave Magazine Articles (10/16/2014) - RF CafeIt's time for another round of RF & microwave articles from our industry's top tier magazines. Happy reading.

Slot Antenna Tames 3 Wireless Bands
   W. Maowen, C. Jianzhong, P. Wenjuan

DARPA's Mobile Hotspot Program Drives E-Band
    Performance Benchmarks,
    J. Chandler, R.W. Steagall

Cut the Defense Budget? Sure, No Worries,
    Barry Manz

Measurement of an Active Radar Module in a
    Compact Antenna Test Range, H. Shakhtour,
    D. Heberling, K. Noujeim, F. Gerhardes, P. Knott

Advantages of Propagation Path Replication for
    Radar Range Testing, J. Mazzochette

Digital Technology is Removing the RF-to-Digital
    Divide, Curtiss-Wright Defense Solutions,
    Tektronix Inc.

Ten Years of Transistors

Ten Years of Transistors, May 1958 Radio-Electronics - RF CafeDid I ever tell the story about a manager I had at a major defense electronics firm who thought he could make an NPN transistor by wiring two diodes in series with the anodes tied together? He reasoned that since a bipolar junction transistor consisted of three alternating layers of n-type and p-type silicon, the device could be affected per his scheme. That was in the mid 1980s when I was still a technician (working diligently on my BSEE degree at night). Needless to say the engineers who worked under him were not too impressed with ...

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