Electronics World articles Popular Electronics articles QST articles Radio & TV News articles Radio-Craft articles Radio-Electronics articles Short Wave Craft articles Wireless World articles Google Search of RF Cafe website Sitemap Electronics Equations Mathematics Equations Equations physics Manufacturers & distributors Engineer Jobs LinkedIn Crosswords Engineering Humor Kirt's Cogitations RF Engineering Quizzes Notable Quotes Calculators Education Engineering Magazine Articles Engineering software RF Cafe Archives RF Cascade Workbook 2018 RF Symbols for Visio - Word Advertising Magazine Sponsor RF Cafe RF Electronics Symbols for Visio RF Electronics Symbols for Office Word RF Electronics Stencils for Visio Sponsor Links Saturday Evening Post NEETS EW Radar Handbook Microwave Museum About RF Cafe Aegis Power Systems Anritsu Alliance Test Equipment Amplifier Solutions Anatech Electronics Axiom Test Equipment Berkeley Nucleonics Bittele Centric RF Conduct RF Copper Mountain Technologies Empower RF everything RF Exodus Advanced Communications Innovative Power Products ISOTEC KR Filters Lotus Systems PCB Directory Rigol San Francisco Circuits Reactel RFCT TotalTemp Technologies Triad RF Systems Windfreak Technologies Withwave LadyBug Technologies Wireless Telecom Group Sponsorship Rates RF Cafe Software Resources Vintage Magazines Thank you for visiting RF Cafe!
RF Cascade Workbook 2018 - RF Cafe

Homepage Archive - November 2021 (page 3)

See Page 1 | 2 | 3 | 4 of the November 2021 homepage archives.

Sunday the 21st

RF Engineering Terms Crossword Puzzle for November 21st

RF Engineering Terms Crossword Puzzle for November 21st, 2021 - RF CafeThis RF Engineering themed crossword puzzle for November 21st contains only clues and words are directly to RF, microwave, and mm-wave engineering, optics, mathematics, chemistry, physics, and other science subjects. As always, this crossword contains no names of politicians, mountain ranges, exotic foods or plants, movie stars, or anything of the sort unless it/he/she is related to this puzzle's technology theme (e.g., Reginald Denny or the Tunguska event in Siberia). The technically inclined cruciverbalists amongst us will appreciate the effort. Enjoy!

Many Thanks for Alliance Test Equipment's Support!

Allied Test Equipment Products - RF CafeAlliance Test Equipment sells used / refurbished test equipment and offers short- and long-term rentals. They also offer repair, maintenance and calibration. Prices discounted up to 80% off list price. Agilent/HP, Tektronix, Anritsu, Fluke, R&S and other major brands. A global organization with ability to source hard to find equipment through our network of suppliers. Alliance Test will purchase your excess test equipment in large or small lots. Blog posts offer advice on application and use of a wide range of test equipment. Please visit Allied Test Equipment today to see how they can help your project.

Friday the 19th

High Voltage Service Hints

High Voltage Service Hints, October 1952 Radio-Electronics - RF CafeIf you have never received a major electrical shock, you might be tempted to be a little lax when working around high voltage. However, once you get your first taste of the jolt, you will probably never forget it and will be very mindful of safety in the future. I got my share of 120 V and 240 V shocks during my days as an electrician. Minor shocks feel like a vibrating twinge of pain that just scare the crap out of you, while more severe instances feel like getting jabbed in the finger(s) with a pick - at least that has been my experience. I got hit by 408 V once while working on a 3-phase air compressor for an auto body shop - that was during high school while in the electrical vocational program. While working on radar in the USAF, I saw a guy get bitten by 10 kV from a CRT display circuit - it left a burn hole in the tip of his finger...

Please Thank Centric RF for Supporting RF Cafe

Centric RF microwave components - RF CafeCentric RF is a company offering from stock various RF and Microwave coaxial components, including attenuators, adapters, cable assemblies, terminations, power dividers, and more. We believe in offering high performance parts from stock at a reasonable cost. Frequency ranges of 0-110 GHz at power levels from 0.5-500 watts are available off the shelf. Order today, ship today! Centric RF is currently looking for vendors to partner with them. Please visit Centric RF today.

Russian Weapon Test Creates Massive Space Debris

Russian Weapon Test Creates Massive Space Debris - RF Cafe"Russia tested an anti-satellite weapon on November 15, destroying one of its own old and defunct satellites, Kosmos 1408. Launched in 1982, Kosmos 1408 was some 300 miles above Earth. Its destruction generated a debris field in Earth orbit that prompted the seven International Space Station crew members, including one Russian cosmonaut, to take cover in their crew capsules for several hours, in case they had to abandon the station. Occupants of the Chinese space station are reported to have taken similar action. The incident also has generated criticism from many corners and a grave discussion on the possible impact of any future such tests, by Russia or anyone else. The danger of damage to the ISS or an orbiting satellite aside, tracking a debris field that could include thousands of pieces..."

All You Need to Know About Coil Design

This Chart and a Ruler Will Give You All You Need to Know About Coil Design, March 1930 Radio News - RF CafeEven in today's world with computing devices everywhere sporting simulators and component calculating programs, there are still times when having a good old fashioned nomograph or chart handy can be very useful while in sitting at a bench selecting component values for tweaking or troubleshooting a design. The advantage of such visual aids is that they provide a big picture of what's happening as frequencies, lengths, widths, core materials, etc. change - being able to see both the trees and the forest, so to speak. When you are working in bands where the component physical size is a significant portion of the wavelength, things get more complicated and a combination of trial and error and calculations / simulations are needed. At the IC design level, of course, you have no choice but to rely solely on your computer, but if you regularly conduct part of your circuit design at a lab bench, I recommend gathering a collection of these kinds...

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...

Many Thanks to Exodus Advanced Communications for Their Support

Exodus Advanced Communications - RF CafeExodus Advanced Communications is a multinational RF communication equipment and engineering service company serving both commercial and government entities and their affiliates worldwide. Power amplifiers ranging from 10 kHz to 51 GHz with various output power levels and noise figure ranges, we fully support custom designs and manufacturing requirements for both small and large volume levels. decades of combined experience in the RF field for numerous applications including military jamming, communications, radar, EMI/EMC and various commercial projects with all designing and manufacturing of our HPA, MPA, and LNA products in-house.

Thursday the 18th

Within the Industry - Oscar Hammarlund Obituary

Within the Industry - Oscar Hammarlund Obituary, October 1945 Radio News - RF CafeA death notice for Mr. Oscar Hammarlund, founder of Hammarlund Manufacturing Company, appeared in the "Within the Industry" monthly column in the October 1945 issue of Radio News magazine. Hammarlund was a major provider of radio communications equipment for amateur radio operators and or the U.S. (and other countries) military during World War II. Hammarlund and many other companies ran advertisements in American Radio Relay League's (ARRL) QST magazine at the time (see "WWII Era Electronics Advertisements in QST Magazine"). Side note: At the end of the war the government made good with the people who scarified for the cause (War Assets Administration Advertisement). In other news, the newly formed Radio Parts and Electronic Equipment Shows announced the election of officers...

RF GaN Market Roller Coaster Ride

RF GaN Market Roller Coaster Ride - RF Cafe"In as little as five years, analysts at Yole Developpement (Yole) predict the already mighty RF GaN device market will mushroom from some $900 million to $2.4 billion. Three decades of investment from defense organizations around the world has placed this high power density, high efficiency material firmly on the compound semiconductor map, with GaN devices routinely used in military radar and electronics warfare. As defense agencies look to commercial applications to pay back their billion dollar investment..."

4-Track Stereo Tapes Coming

4-Track Stereo Tapes Coming, July 1958 Radio-Electronics - RF CafeBefore the ground-breaking, paradigm-changing, outside-the-box 8-track tape came the 4-track tape, itself a marvel of modern technology. This brief announcement regarding its imminent introduction to the music storage and playback world appeared in the July of 1958 of Radio-Electronics, barely a month before my introduction into this old world. Many people did -and still do - scoff at the mention of an 8-track tape deck and assorted tapes. I actually preferred them over the snobbishly preferred cassette tape because unlike cassettes where you had to run serially through each song to reach the next, or through several if noncontiguous on the tape, the 8-track featured parallel recordings so that switching from one song to the next was instantaneous. Some 8-trackers, yielding to the pressure of cassette elitists...

Coffee Linked to Lower Risk of Stroke and Dementia

Coffee Linked to Lower Risk of Stroke and DementiaThanks to website visitor  for the heads-up on this important news! "Those who reported drinking a 'moderate' amount of coffee and/or tea daily were less likely to be diagnosed with stroke and dementia, according to new research. New research out this week suggests that a tea or coffee habit in your later years could help your brain stay in tip-top shape. The study found that healthy older adults in the UK who regularly drank coffee and/or tea were less likely to develop stroke and dementia over an 11-year period than those who drank neither. Though these findings can't confirm a cause-and-effect link, they are the latest to indicate that these brewed drinks have some health benefits. Dementia is a progressive and currently incurable loss of cognitive function..."

Software Developer Needed by WV Communications

Software Developer Needed by WV Communications - RF CafeWV Communications, a world class RF/Microwave Solutions Company, is immediately seeking an enthusiastic and capable Software Developer. Our product line consists of innovative, high technology, quality electronic hardware, software, and sub-systems for both Military and Commercial applications that is installed and operational Worldwide. The successful candidate will have skills including minimum 2 years' experience working with C++ and Qt in a cross-platform Linux/Windows Environment; Standard Library/STL, programming OpenGL, programming networks, and programming and debugging multi-threaded applications; working with Red Hat Enterprise Linux and the ability to build and distribute RPMs and maintain repositories emphasized; automated build systems such as Jenkins, and source code control systems such as Git is requested. Red Mine knowledge is a bonus...

Belmont Model 408 "Farm" Superhet Radio Service Data Sheet

Belmont 4-Tube Model 408 (Series A) Battery "Farm" Superhet Radio Service Data Sheet, October 1938 Radio-Craft - RF CafeFor the last few years I have been scanning and posting Radio Service Data Sheets like this one featuring the Belmont 4-Tube Model 408 (Series A) Battery "Farm" Superhet radio in graphical format, rather than run OCR on them to separate the textual content. It appeared in the October 1938 issue of Radio-Craft magazine. There are still many people who restore and service these vintage radios, and often it can be difficult or impossible to find schematics and/or tuning information. No example of this radio could be found on the WWW. I keep a running list of all data sheets at the bottom of the page to facilitate a search...

RF & Electronics Symbols for Office™

RF & Electronics Schematic & Block Diagram Symbols for Office™ r2 - RF CafeIt was a lot of work, but I finally finished a version of the "RF & Electronics Schematic & Block Diagram Symbols" that works well with Microsoft Office™ programs Word™, Excel™, and Power Point™. This is an equivalent of the extensive set of amplifier, mixer, filter, switch, connector, waveguide, digital, analog, antenna, and other commonly used symbols for system block diagrams and schematics created for Visio™. Each of the 1,000 or so symbols was exported individually from Visio in the EMF file format, then imported into Word on a Drawing Canvas. The EMF format allows an image to be scaled up or down without becoming pixelated, so all the shapes can be resized in a document and still look good. The imported symbols can also be UnGrouped into their original constituent parts for editing. Check them out!

Please Thank RF Superstore for Their Continued Support

RF Superstore coaxial cable, connectors, adapters - RF CafeRF Superstore launched in 2017, marking the return of Murray Pasternack, founder of Pasternack Enterprises, to the RF and microwave Industry. Pasternack fundamentally changed the way RF components were sold. Partner Jason Wright manages day-to-day operations, while working closely with Mr. Pasternack to develop RF Superstore into a world class RF and microwave component supplier. RF coaxial connectors & adapters, coaxial cable & cable assemblies, surge protectors, attenuators. Items added daily. Free shipping on orders over $25. We're leading the way again!

Wednesday the 17th

U.S. Air Force's New Radar Height Finder

U.S. Air Force's New Radar Height Finder, March 1955 Popular Electronics - RF CafeAside from the photos of cool radar antennas, "Made by General Electric of Syracuse, N.Y.," caught my attention because I actually spent a couple years there in the mid 1990s as an engineer working with a design team for a weather radar for the FAA. It was a kludge of left-over components and assemblies from other cancelled programs. The phased array antenna came from a Navy shipboard program, and the components for the RF, analog, and digital portions were cobbled together mostly from parts that were in the company stock room inventory. Very little money was budgeted for new parts or personnel. I handled all the RF and analog design and the equipment rack power supplies, plus RF plumbing out of the building and into the phased array antenna (2 other engineers handled the antenna assembly). One of the coolest parts of the design was the waveguide...

Fighting Flat-Earth Theory

Fighting Flat-Earth Theory - RF CafeOK, this is weird - "Physicists will find it shocking, but there are plenty of people around the world who genuinely believe the Earth is flat. Rachel Brazil explores why such views are increasingly taking hold and how the physics community should best respond. In 2017 the US rapper B.o.B (real name Bobby Ray Simmons, Jr.) started a crowd-funding campaign to launch a satellite. The rapper, a vocal proponent of 'flat-Earth theory,' wanted to seek evidence that our planet is a disc, not a globe. His aim was to raise $200,000 (later upped to $1M) on the GoFundMe website, with the aim of sending one or more craft into space to help him 'find the curve' - the term that 'flat-Earthers' use to describe the edge of our supposed disc-shaped planet. The rapper's quest may seem like a joke or publicity stunt. Indeed, there's currently no evidence..."

Please Thank IPP for Their Long-Time Support!

Innovative Power ProductsInnovative Power Products (IPP) has over 30 years of experience designing & manufacturing RF & microwave passive components. Their high power, broadband couplers, combiners, resistors, baluns, terminations and attenuators are fabricated using the latest materials and design tools available, resulting in unrivaled product performance. Applications in military, medical, industrial and commercial markets are serviced around the world. Please take a couple minutes to visit their website and see how IPP can help you today. 

R&S Turnkey Solutions for Mobile ATC Towers

Rohde & Schwarz Turnkey Communications Solutions for UAE Mobile ATC Towers - RF CafeRohde & Schwarz has successfully delivered communications equipment for mobile air traffic control (ATC) towers to a customer in the United Arab Emirates (UAE). Having already supplied an UAE customer with radios in the past, Rohde & Schwarz has been chosen again, as the company provided the best solution for the customer. Each mobile ATC tower consists of a cabin equipped with consoles, all installed on a lifting system fixed on a trailer that is fitted to be transportable by a C17 transport aircraft. Each cabin has been designed to accommodate three controller working positions, equipped with R&S Series4200 software defined radios, CERTIUM VCS voice communications system, CERTIUM Management and CERTIUM Gateways...

Density of Common Building Materials

Density of Common Building Materials per Cubic Foot - RF CafeThese values for density of some common building materials were collected from sites across the Internet and are generally in agreement with multiple sites. Most are from ASAE (American Society of Engineers and Architects) tables. However, if you have values that you believe are more accurate, use them for your calculations, and please send me an e-mail to let me know what your values are. Note that original units were lb/ft3, so actual number of significant places in kg/m3 column are the same as the original unit; i.e., aluminum density is really only known to three significant places even though four are presented...

RF Cascade Workbook

RF Cascade Workbook - RF CafeRF Cascade Workbook 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 (click here for screen capture). 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...

Many Thanks to Aegis Power Systems for Continued Support!

Aegis Power Systems - RF CafeAegis Power Systems is a leading supplier of AC-DC and DC-DC power supplies for custom and special applications. Aegis has been designing and building highly reliable custom power supplies since 1995. They offer a complete line of switch mode power supplies and power converters for a variety of markets including defense, industrial, aircraft, VME, and telecom. Supports military, aircraft, EV, telecom, and embedded computing applications. Design and manufacture of custom power supply solutions to meet each customer's exacting specifications. Please visit Aegis Power Systems today.

Tuesday the 16th

Microwaves Part VI - Test Equipment & Frequency Conversion

Microwaves Part VI - Test Equipment & Frequency Conversion, October 1949 Radio-Electronics - RF CafePart VI of C.W. Palmer's series on Microwaves discusses "equipment used for measuring frequency, and crystals for receiver frequency conversion." He spends a lot of time describing high frequency wavemeters - how they work and how they're used for measurements. I always thought there was something cool about the resonant cavity type wavemeters and am impressed that someone came up with the idea. When I first saw one I thought the cylinder rotated automatically to indicate the resonant frequency, but in fact your need to manually rotate the wavemeter's cylinder while monitoring a power meter. It's cool anyway, though. Note that in 1949 when these articles appeared in Radio−Electronics magazine, the word we nowadays write as "coaxial" was then hyphenated as "co−axial..."

Tiny IC Gives Big Boost in Precision Optics

Tiny IC Gives Big Boost in Precision Optics - RF Cafe"By merging two or more sources of light, interferometers create interference patterns that can provide remarkably detailed information about everything they illuminate, from a tiny flaw on a mirror, to the dispersion of pollutants in the atmosphere, to gravitational patterns in far reaches of the Universe. 'If you want to measure something with very high precision, you almost always use an optical interferometer, because light makes for a very precise ruler,' says Jaime Cardenas, assistant professor of optics at the University of Rochester. Now, the Cardenas Lab has created a way to make these optical workhorses even more useful and sensitive..."

RF Semi Market to Grow by $1B Through 2025

RF Semi Market to Grow by $1B Through 2025 - RF Cafe"According to a report published by Technavio, the RF semiconductor market size is set to grow by USD 961.22 million from 2020 to 2025. Factors such as increasing demand for RF devices for smartphones will offer immense growth opportunities. To leverage the current opportunities, market vendors must strengthen their foothold in the fast-growing segments, while maintaining their positions in the slow-growing segments. The RF semiconductor market is fragmented, and the degree of fragmentation will accelerate during the forecast period. Some of the major vendors of the RF semiconductor market include Broadcom, Cree, Fujitsu, GCT Semiconductor, Infineon Technologies..."

RF Microwave Technician Needed by WV Communications

RF Microwave Technician Needed by WV Communications - RF CafeWV Communications, Inc., a world class RF/Microwave Solutions Company, is immediately seeking an enthusiastic and capable RF Microwave Technician. Our product line consists of innovative, high technology, quality electronic hardware, software, and sub-systems for both Military and Commercial applications that is installed and operational Worldwide. Let WV Communications be your mentor if you seek career growth in the rich and fascinating field of RF and Microwave Communications Equipment Manufacturing! We offer a competitive salary, comprehensive benefits, a challenging work environment and a supportive family atmosphere. Our employees share a common thread: they enjoy coming to work…we like it here; we like the intensity, the energy, the passion of doing a job well and serving our customers; of developing products that do extraordinary things in extraordinary ways. We also make time for enjoying life...

Is Fair Trade the Answer to TV Price Cutting Problem?

Is Fair Trade the Answer to TV Price Cutting Problem?, October 1949 Radio & Television News - RF Cafe"Fair Trade" was a policy established in the post-WWII era in response to what consumer retail groups considered business-ruining cost cutting by dealers who offered to sell products at or barely above cost in order to steal profit from other stores. So−scheming stores planned to make up for the low profit margin with high sales volumes. Doing so drove a lot of the local competition out of business, leaving the crafty dirty dealers to later raise prices. Stores that had manufacturer-sanctioned service shops often got screwed because they were obligated to repair items like TVs and radios that were bought from another dealer who did not do service work. Profit margins on repair work - at least from honest shops - were typically very low, so the owners depended on new product sales to help raise the bottom line...

RF & Electronics Symbols for Office™

RF & Electronics Schematic & Block Diagram Symbols for Office™ r2 - RF CafeIt was a lot of work, but I finally finished a version of the "RF & Electronics Schematic & Block Diagram Symbols" that works well with Microsoft Office™ programs Word™, Excel™, and Power Point™. This is an equivalent of the extensive set of amplifier, mixer, filter, switch, connector, waveguide, digital, analog, antenna, and other commonly used symbols for system block diagrams and schematics created for Visio™. Each of the 1,000 or so symbols was exported individually from Visio in the EMF file format, then imported into Word on a Drawing Canvas. The EMF format allows an image to be scaled up or down without becoming pixelated, so all the shapes can be resized in a document and still look good. The imported symbols can also be UnGrouped into their original constituent parts for editing. Check them out!

Many Thanks to Reactel for Their Long-Time Support!

Reactel Filters - RF Cafe

Reactel has become one of the industry leaders in the design and manufacture of RF and microwave filters, diplexers, and sub-assemblies. They offer the generally known tubular, LC, cavity, and waveguide designs, as well as state of the art high performance suspended substrate models. Through a continuous process of research and development, they have established a full line of filters of filters of all types - lowpass, highpass, bandpass, bandstop, diplexer, and more. Established in 1979. Please contact Reactel today to see how they might help your project.

Monday the 15th

Centralab Wafer Selector Switches

Centralab Wafer Selector Switches, June 1945 Radio-Craft - RF CafeWafer / stacked / rotary switches are not found very often in new equipment thanks to the amount of digitization being used. However, prior to around the 1980s they were present in just about everything that had selectable functions. Stereo controls for choosing AM, FM, Phonograph, Auxiliary, Tape, and other types of inputs used wafer switches. Oscilloscope and other test equipment switches for time base, trigger source, amplitude scale, frequency band, and x/y and channel input options used them. Tape recorders, televisions and cameras, washing machines, and many other household items contained one or more wafer switches. Military, aviation, nautical, and industrial equipment of all sorts were full of them. Interconnections typically went between layers / tiers / wafers as part of very complex switching schemes. Here are fairly simple examples of rotary switch implemented in a VTVM and a transistor tester. Much more complicated wiring schemes...

Diamond Nuclear Spin Gyroscope

Diamond Nuclear Spin Gyroscope - RF Cafe"In a new report now published in Science Advances, Andrey Jarmola and an international research team in physics and materials in the U.S. and Germany demonstrated the function of a rotation sensor based on the Nitrogen-14 (14N) nuclear spins intrinsic to nitrogen-vacancy color centers in diamond. Nitrogen vacancy color centers are formed by nitrogen impurities that sit next to a missing carbon in diamond. The sensor used optical polarization and readout of the nuclei and a radiofrequency double-quantum pulse protocol to monitor the 14N nuclear spin precession. Rotation sensors or gyroscopes are typically used for navigation and automotive guidance. Among commercial sensors including mechanical gyroscopes and microelectromechanical systems, emerging techniques include nuclear magnetic resonance (NMR) gyroscopes..."

Triad Expands Operations with New Manufacturing Center

Triad Expands Operations with New Manufacturing Center - RF CafeTriad RF Systems is pleased to announce the opening of a new Manufacturing Center, conveniently located opposite the company's existing Design Center in East Brunswick, New Jersey. This new facility increases Triad's manufacturing capacity six-fold and creates additional space to expand the company's innovative design center. Triad's investment in the new manufacturing center is a direct response to growing global demand for Triad's RF amplifiers, integrated radio systems and custom RF products for unmanned systems, drones, CubeSat platforms, custom military applications, and electronic warfare systems. "Our new MCoE (Manufacturing Center of Excellence) showcases Triad's ability to bring rugged, small, SWaP optimized, mission-critical and high performance wireless...

Engineering Wall Charts / Posters

 Engineering Wall Posters (Keysight cum Agilent cum HP)- RF CafeWall charts / posters featuring high tech themes are Art du Jour for engineering labs, cubicles, and offices. Many companies provide custom designs that provide useful information about subjects like RF and microwave system design, frequency standards, radar fundamentals, wireless network planning, regulatory topics, etc., while also often taking the opportunity to promote their products. Unlike the lab wall posters of yore, today's posters are large and full of vibrant colors. Since it had been a very long while since I last scoured the Internet for available posters, I decided to begin with Keysight Technologies (formerly Agilent Technologies, formerly Hewlett-Packard) to see what they have. Thumbnails of some of the most interesting for RF Cafe visitors are shown below, and there are hyperlinks provided to the company website where you can either download...

Survey: Engineering Still a Great Job

Survey: Engineering Still a Great Job - RF CafeElectronic Design has been releasing parts of their 2021 Engineering Survey results. This one pertains to job satisfaction and company hiring behavior. "I was excited about engineering before I was in high school... I've had a lot of jobs since then and backed into the editorial side of things because I had a knack for technical writing... I have three children who are all engineers, although none went into electric engineering or software like dear old dad or into mom's engineering field either. I'm happy to say that most engineers and programmers want to stay in their jobs and would recommend them to others based on the results of our recent salary survey. The majority of engineers and programmers were satisfied with their current position, which is a good indication they chose the right profession..."

Amphenol Tube Socket Wall Chart

Amphenol Tube Socket Wall Chart, January 1945 Radio News - RF CafeA While back I posted a page pointing to the many laboratory wall charts offered by Keysight Technologies (formerly Agilent, formerly Hewlett Packard). 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 which appeared in a 1945 issue of Radio News magazine. 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...

Thanks Again to Berkeley Nucleonics for Their Support!

Berkeley Nucleonics Corp - RF Cafe Berkeley Nucleonics Corporation (BNC) is a leading manufacturer of precision electronic instrumentation for test, measurement, and nuclear research. Founded in 1963, BNC initially developed custom pulse generators. We became known for meeting the most stringent requirements for high precision and stability, and for producing instruments of unsurpassed reliability and performance. We continue to maintain a leadership position as a developer of custom pulse, signal, light, and function generators. Our designs incorporate the latest innovations in software and hardware engineering, surface mount production, and automated testing procedures.


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

2023:  Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec

2022:  Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec

2021:  Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec

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 (no archives before 2012)

everythingRF RF & Microwave Parts Database (h1) - RF Cafe

KR Electronics (RF Filters) - RF Cafe
Rigol DSG5000 Microwave Generator - RF Cafe
RF Electronics Shapes, Stencils for Office, Visio by RF Cafe

Please Support RF Cafe by purchasing my  ridiculously low−priced products, all of which I created.

These Are Available for Free


About RF Cafe

Kirt Blattenberger - RF Cafe Webmaster

Copyright: 1996 - 2024


    Kirt Blattenberger,


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 tying up your telephone line, and a nice lady's voice announced "You've Got Mail" when a new message arrived...

All trademarks, copyrights, patents, and other rights of ownership to images and text used on the RF Cafe website are hereby acknowledged.

My Hobby Website: