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Homepage Archive - October 2020 (page 1)

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 "Search RF Cafe" box at the top of every page. About RF Cafe.

Homepage Archive Pages

2020:  Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec
2019:
  Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec
2018:  Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec
2017:  Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec
2016:  Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec
2015:  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
2013:  Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec
2012:  1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13


See Page 1 | 2 | 3 | 4 of the October 2020 homepage archives.
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Friday 2

Thursday 1

Rauland Zenith Aluminizing

Rauland Zenith Aluminizing, November 1953 Radio-Electronics - RF CafeRauland (aka Rauland-Borg) has today on its History webpage that it was founded in 1922 as the Rauland Company, by inventor and radio enthusiast E. Norman Rauland. Soon thereafter he became a pioneer in the radio broadcast industry by launching the Chicago-based radio station, WENR (which eventually became the well-known WLS). In 1941 Norm Rauland and George Borg entered a partnership, and a year later acquired Baird Television of America. Rauland developed cathode ray tubes (CRT) and became an important supplier of communications and radar equipment during WWII. After the war, Rauland began manufacturing CRTs for 10" and 12" televisions. They were so successful that in 1948, Zenith Radio Corporation purchased them to get the CRT technology. This circa 1953 Rauland advertisement ran in Radio-Electronics magazine to pitch their breakthrough aluminizing process that produced CRTs with brighter pictures and greater contrast with relatively low anode voltages, which was a big deal at the time due to concern over high levels of x-rays...

Technical Writers Needed - Remote Working

Technical Writers Needed by PCBONLINE - RF CafeHere is an excellent opportunity for engineers and technicians to earn while working from home! PCBONLINE, a global supplier of complex rigid and flex-rigid printed circuit boards (PCBs),and one-stop production with maximum flexibility ranging from prototype sample to mass production, is in want of part-time work-from-home technical writers. Candidates to be familiar with general electronic knowledge, especially project engineering. It would be best if the candidates can write interesting posts about how to get from schematics, to PCB layout, to Gerber files, and PCB manufacturing. Responsibilities include writing and revising technical articles according to the outlines about PCBs, PCBA, electronic components and other electrics-related topics...

Notable Tech Quote: Joel Hallas, W1ZR

Joel R. Hallas Notable Tech Quote - RF CafeJoel R. Hallas (W1ZR), ARRL QST magazine's monthly "The Doctor Is In" column writer, has written many notable quotes over the years while responding to readers' questions. Most of the Q's and A's are about antennas, transmission lines, and impedance matching. The October 2020 issue contains the following statement which is profoundly important to remember, particularly where antennas are concerned, "...but ground is always somewhere." It might seem like a Captain Obvious statement, but people not overly familiar with the effects of a ground plane - be it solid, mesh, or an array of radials - can and does have a huge effect on the radiation pattern and effective impedance of every kind of antenna. Mr. Hallas' middle initial is given as "R," but is might as well be "E" - for EZNEC - because of his masterful and frequent use of it in analyzing antenna setups and which often includes pattern plots in his answers. It just figures that since I mention it, EZNEC is not mentioned this month.

Thermal Diode Rectifies Heat in Both Directions

Unusual Thermal Diode Rectifies Heat in Both Directions - RF Cafe"You can feel it on your laptop and mobile phone. It's behind your refrigerator and office copy machine. While heat is desirable for appliances like a coffee maker, it can jeopardize the reliability and safety of electronic systems in other devices, causing premature failure at best and explosions at worst. Active control of heat transport, as with thermal switches and thermal diodes, is important for a range of applications in heating and cooling, energy conversion, materials processing, and data storage. In practice, thermal diodes are highly desirable thermal components for many engineering applications because they allow energy systems to transfer heat to designated areas..."

New Book: Designing Wireless Sensor Network Solutions for Tactical ISR

Designing Wireless Sensor Network Solutions for Tactical ISR - RF CafeArtech House today announced the release of Designing Wireless Sensor Network Solutions for Tactical ISR, by Timothy D. Cole. This comprehensive resource demonstrates how wireless sensor network (WSN) systems, a key element of the Internet of Things (IoT), are designed and evaluated to solve problems associated with autonomous sensing systems. Functional blocks that form WSN-based systems are described, chapter by chapter, providing the reader with a progressive learning path through all aspects of designing remote sensing capabilities using a WSN-based system. The development and a full description of fundamental performance equations and technological solutions required by these real-time systems are included. New Release discount price available now...

Many Thanks to Bittele Electronics for Continued Support!

Bittele Electronics PCB Fabrication - RF CafeSince 2003, Bittele Electronics has consistently provided low-volume, electronic contract manufacturing (ECM) and turnkey PCB assembly services. It specializes in board level turnkey PCB assembly for design engineers needing low volume or prototype multi-layer printed circuit boards. Free Passive Components: Bittele Electronics is taking one further step in its commitment of offering the best service to clients of its PCB assembly business. Bittele is now offering common passive components to its clients FREE of Charge.

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 autodidacts

Heathkit 1982 Christmas Catalog

Heathkit Christmas 1982 Catalog - RF Cafe

 

 Electronics-Themed Comics June 1951 Radio-Electronics  

Engineering Job Opening

Promote Your Company on RF Cafe for as Little as $40/mo.

Sponsor RF Cafe for as Little as $40 per Month - RF CafeRF Cafe typically receives 8,000-15,000 website visits each weekday and about half that on weekends. RF Cafe is a favorite of engineers, technicians, hobbyists, and students all over the world. With more than 13,000 pages in the Google search index, RF Cafe returns in favorable positions on many types of key searches, both for text and images. New content is added on a daily basis, which keeps the major search engines interested enough to spider it multiple times each day. Items added on the homepage often can be found in a Google search within a few hours of being posted. I also re-broadcast homepage items on LinkedIn. If you need your company news to be seen, RF Cafe is the place to be. Advertising begins at $40/month.

RF Cascade Workbook 2018

RF Cascade Workbook 2018 Is Available Now! - RF CafeRF Cascade Workbook 2018 is the next phase in the evolution of RF Cafe's long-running series, RF Cascade Workbook. Chances are you have never used a spreadsheet quite like this. It is a full-featured RF system cascade parameter and frequency planner that includes filters and mixers for a mere $45. Built in MS Excel, using RF Cascade Workbook 2018 is a cinch and the format is entirely customizable. It is significantly easier and faster than using a multi-thousand dollar simulator when a high level system analysis is all that is needed. An intro video takes you through the main features...

RF & Electronics Symbols for Visio

RF Electronics Wireless Analog Block Diagrams Symbols Shapes for Visio - RF CafeWith more than 1000 custom-built symbols, this has got to be the most comprehensive set of Visio Symbols available for RF, analog, and digital system and schematic drawings! Every object has been built to fit proportionally on the provided A-, B- and C-size drawing page templates (or can use your own). Symbols are provided for equipment racks and test equipment, system block diagrams, conceptual drawings, and schematics. Unlike previous versions, these are NOT Stencils, but instead are all contained on tabbed pages within a single Visio document. That puts everything in front of you in its full glory. Just copy and paste what you need on your drawing. The file format is XML so everything plays nicely with Visio 2013 and later...

Get Your Custom-Designed RF Cafe Gear!

Custom-Designed RF-Themed Cups, T-Shirts, Mouse Pads, Clocks (Cafe Press) - RF CafeThis assortment of custom-designed themes by RF Cafe includes T-Shirts, Mouse Pads, Clocks, Tote Bags, Coffee Mugs and Steins, Purses, Sweatshirts, and Baseball Caps. Choose from amazingly clever "We Are the World's Matchmakers" Smith chart design or the "Engineer's Troubleshooting Flow Chart." My "Matchmaker's" design has been ripped off by other people and used on their products, so please be sure to purchase only official RF Cafe gear. My markup is only a paltry 50¢ per item - Cafe Press gets the rest of your purchase price. These would make excellent gifts for husbands, wives, kids, significant others, and for handing out at company events or as rewards for excellent service. It's a great way to help support RF Cafe. Thanks...

Post Your Engineer & Technician Job Openings on RF Cafe for Free

Engineering Job Board - RF CafeRF Cafe's raison d'être is and always has been to provide useful, quality content for engineers, technicians, engineering managers, students, and hobbyists. Part of that mission is offering to post applicable job openings. HR department employees and/or managers of hiring companies are welcome to submit opportunities for posting at no charge. 3rd party recruiters and temp agencies are not included so as to assure a high quality of listings. Please read through the easy procedure to benefit from RF Cafe's high quality visitors...

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Lighting the Way to Infrared Detection

Lighting the Way to Infrared Detection - RF Cafe"EPFL physicists propose a new path to detect infrared radiation with outstanding sensitivity, allowing detection of signals as low as that of a single quantum of light. When using our webcam or cell phone camera, we experience the tremendous capabilities of cheap and compact sensors developed in the past decades for the visible region of the electromagnetic spectrum. On the contrary, detection of lower frequency radiation not visible to the human eye (such as mid- and far-infrared radiation) requires complex and costly equipment. Lack of a compact technology impedes widespread access to sensors for the recognition of molecules and the imaging of thermal radiation naturally emitted by our bodies. A new conceptual breakthrough in this field may therefore..."

Creating Cross-Domain Kill Webs in Real Time

Creating Cross-Domain Kill Webs in Real Time - RF Cafe"Two DARPA-developed technologies - a novel decision aid for mission commanders and a rapid software integration tool - played a critical role in the recent Air Force demonstration of the Advanced Battle Management System (ABMS). The Adapting Cross-domain Kill-webs (ACK) program and the System-of-systems Technology Integration Tool Chain for Heterogeneous Electronic Systems (STITCHES) were among a number of technologies employed in the Aug. 31 - Sep. 4 ABMS on-ramp demonstration, which involved attacks using live aircraft, ships, air defense batteries, and other assets. ACK is developing a decision aid for mission commanders to assist them with rapidly identifying and selecting options for tasking - and re-tasking - assets within and across organizational boundaries. Specifically, ACK assists users with selecting sensors, effectors..."

 

  European Space Agency Develops a Mesh Reflector for Shaped Radio Beams   

 

  Electron Hole, Meet Your Fractional Cousin   

 

   Smallest thermoelectric cooler, by 10,000 times  

 

 

 

 

 

 

 

 

 

 

 

 

Anatech Electronics (RF Filters) - RF Cafe ConductRF Phased Matched RF Cables - RF Cafe
Exodus Advanced Communications - RF Cafe Res-Net Microwave - RF Cafe
About RF Cafe
Kirt Blattenberger - RF Cafe Webmaster
Copyright: 1996 - 2024
Webmaster:
    Kirt Blattenberger,
    BSEE - KB3UON

RF Cafe began life in 1996 as "RF Tools" in an AOL screen name web space totaling 2 MB. Its primary purpose was to provide me with ready access to commonly needed formulas and reference material while performing my work as an RF system and circuit design engineer. The World Wide Web (Internet) was largely an unknown entity at the time and bandwidth was a scarce commodity. Dial-up modems blazed along at 14.4 kbps while typing up your telephone line, and a nice lady's voice announced "You've Got Mail" when a new message arrived...

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