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Homepage Archive - October 2022 (page 1)

See Page  1 | 2 | 3 | 4 of the October 2022 homepage archives.
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Friday the 7th

Electronics-Themed Comics

Electronics-Themed Comics, February 1946 Radio News - RF CafeIf the electronics-themed comic from page 35 of the February 1946 issue of Radio News magazine was drawn today, you might think the face-diapered mother-in-law was a Covid-19'er (although improperly worn). Then again, if that comic were published today, the magazine and the artist would be cancelled on social media for daring to poke fun at the lady. The page 48 comic reflected the love-hate relationship the public had with electronic repair shops in the era. Peruse through the plethora of comics as well as multiple stories in the vintage electronics industry magazines here on RF cafe and you will find many examples of the same theme. Shop owners routinely were accused of overcharging customers for labor and for needlessly replacing components (and for charging for new parts when used or repaired parts were installed). In truth, there was a lot of ripping-off of customers, but there was also a lot of customers refusing to pay for honest repairs...

"Over the Horizon" Transmission

"Over the Horizon" Transmission, August 1955 Popular Electronics - RF CafeHere is a brief article about implementing over−the−horizon (OTH) transmissions for television and phone signals. It appeared in a 1955 issue of Popular Electronics magazine, only a decade after the end of World War II and at the tail end of the Korean War, when the majority of households had at least one TV set. Being able to exploit OTH would eliminate numerous relay towers in−between which are not only expensive, but often are difficult to locate due to property acquisition issues. The article suggests the possibility 200 mile spacing between towers. A transmission tower 1,000 feet tall looking out over flat land sees the horizon at about 38 miles, so another 1,000-foot tower another 38.7 miles in line from the horizon would give 77.4 miles total between towers, but that assumes perfect line-of-sight propagation without refraction, reflection...

Space-Based WAAS Navigation System Modernization

Raytheon to Modernize Space-Based WAAS Navigation System - RF Cafe"The U.S. Federal Aviation Administration (FAA) has contracted Raytheon to further refine the space-based precision navigation system WAAS (Wide-Area Augmentation System). Specifically, Raytheon Intelligence & Space will modernise the system, in terms of system security, network architecture and adding dual frequency service. WAAS was developed by the Federal Aviation Administration to augment GPS services by increasing its accuracy and availability. The satellite-based augmentation system (SBAS), which provides GPS corrections for critical navigation for aircraft, first responders and other government agencies, helps ensure - for example - that pilots can land safely in difficult environments and weather..."

Erie Resistor Corporation Advertisement

Erie Resistor Corporation Advertisement, January 1952 Radio & Television News - RF CafeWhen I first saw an Erie Resistor Corporation advertisement in the December 1958 issue of Popular Electronics magazine, I decided to research its history here in Erie, Pennsylvania, where I live. Click on the above hyperlink if you are interested in what I discovered - including a note from a former Erie Resistor Corporation engineer. This particular advertisement appeared in the January 1952 issue of Radio & Television News magazine, so I figured I'd post it as well...

RF & Electronics Stencils for Visio

RF & Electronics stencils for Visio r4 - RF CafeWith more than 1000 custom-built stencils, this has got to be the most comprehensive set of Visio Stencils available for RF, analog, and digital system and schematic drawings! Every stencil symbol has been built to fit proportionally on the included A-, B-, and C-size drawing page templates (or use your own page if preferred). Components are provided for system block diagrams, conceptual drawings, schematics, test equipment, racks (EIA 19", ETSI 21"), and more. Test equipment and racks are built at a 1:1 scale so that measurements can be made directly using Visio built-in dimensioning objects. Page templates are provided with a preset scale (changeable) for a good presentation that can incorporate all provided symbols...

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 6th

Mac's Service Shop: Chemicals for the Service Shop

Mac's Service Shop: Chemicals for the Service Shop, September 1965 Electronics World - RF CafeLiquid Wrench, of which I have a can sitting in my garage, has been around since 1941 per the company website. WD−40, of which I also have a can, first appeared in 1958. That is surprising to me since I was using WD−40 long before having heard of Liquid Wrench. Mac introduces side-kick technician Barney to Liquid Wrench in this episode entitled, "Chemicals for the Service Shop." It appeared in the September 1965 issue of Electronics World magazine when both products had been widely available for quite a while. Strange that WD−40 was not mentioned, too. Also discussed in the technodrama are liquid protective coatings like spray-on insulation and electrical connection weatherproofing coatings, cleaners (as replacements for the dreaded carbon tetrachloride, aka "carbon tet"), adhesives, lubricants, and some products like component cooling sprays and paints/stains for repairing cabinets...

Easy Galvanic Isolation

Easy Galvanic Isolation - RF CafeFrederik Dostal has a useful article on the Electronic Design website entitled, "Easy Galvanic Isolation, which suggests a method for achieving isolation without the use of a separate feedback transformer or an optocoupler by building a feedback circuit on the primary side. It is an infomercial for Analog Devices, but that's OK. He begins, "Transformers are generally used to create this electrical separation. Presented here are two flyback-converter options that can be applied to facilitate the design process. Many electronic circuits require galvanic isolation, which typically involves the use of transformers. Numerous different topologies are employed to transmit electrical energy via a transformer. One widely used circuit type, especially for low power of approximately 50 W or less, is the flyback converter. Figure 1 shows a schematic of a simple flyback converter. While switch S1 is on, a flyback converter stores energy in the transformer core T1..."

Recent Developments in Battery Design

Recent Developments in Battery Design, July 1959 Popular Electronics - RF Cafe"Mr. Scott, prepare to load the promethium batteries into the dilithium crystal chamber." OK, I made up the promethium batteries part, but you might not have suspected it. Back in the mid to late 1950s, atomic batteries were seriously thought to potentially (no pun intended) be a futuristic source of energy storage and generation. The concept worked by having beta particles from promethium decay impinge on silicon photodetectors, and having that be the source of power. That's almost as Rube Goldberg−ish as having a gasoline engine drive an electric generator to power a motor for automotive locomotion. Oh, wait, that describes the Chevy Volt. Note that in 1959, nickel cadmium (NiCad) batteries were just coming into commercial use, and the author envisions a day when they might be used for portable power tools and flashlights. At least he was right about that one...

Teaming Amplifiers and Signal Generators

Axiom Test Equipment Blog: Teaming Amplifiers and Signal Generators - RF CafeAxiom Test Equipment, Inc., an electronic test equipment rental and sales company has published a new blog post entitled, "Teaming Amplifiers and Signal Generators," that explains how connecting a suitable amplifier to a signal generator can be boosted to the power levels needed in a project. Signal generators serve as sources of analog, digital, and even RF/microwave signals for test purposes. They may not always deliver enough output power for some tests, such as characterizing filters and antennas, and help may be needed. By connecting a suitable amplifier, a signal generator can be boosted to the required power levels. Finding the right combination comes down to knowing the key specifications for both units. Laboratory amplifiers can be specified by frequency range, bandwidth, output power, and gain or input power required to reach the rated output power...

Vintage General Electric Advertisement

Vintage General Electric Advertisement, October 1953 QST - RF CafeBy 1953, General Electric had already been in business for 75 years, according to this full-page advertisement that ran in the American Radio Relay League's (ARRL) QST magazine. It highlights a few key electronics-related accomplishments by the company since Thomas Edison in 1883 built the first electronic tube as the result of a discovery that came to be termed the "Edison effect." Interestingly, the terminology "a founder of G.E." is used to describe Edison. Upon researching the company's origin, I found this on Wikipedia: "In 1889, Drexel, Morgan & Co., a company founded by J.P. Morgan and Anthony J. Drexel, financed Edison's research and helped merge those companies under one corporation to form Edison General Electric Company, which was incorporated in New York on April 24, 1889..."

RF Cascade Workbook

RF Cascade Workbook - RF Cafe RF 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 Withwave for Long−Time Support!

Withwave RF & Microwave Components - RF CafeWithwave manufactures an extensive line of metrology quality coaxial test cable assemblies, connectors (wave-, end-, vertical-launch, board edge, panel mount), calibration kits (SOLT), a fully automated 4-port vector network analyzer (VNA) calibrator, between- and in-series connector adaptors, attenuators, terminations, DC blocks, torque wrenches, test probes & probe positioner. Special test fixtures for calibration and multicoax cable assemblies. Frequency ranges from DC through 110 GHz. Please contact Withwave today to see how they can help your project succeed.

Wednesday the 5th

John L. Baird, "Father of Television," Dead

Radio-Electronics Monthly Review, August 1946 Radio-Craft - RF CafeRadio-Electronics magazine for a long time ran a "Radio-Electronics Monthly Review" column which reported on some the major happenings in the industry. At the time, editors did not have instant news availability like we have today via the Internet, so discovering items like those included in this August 1946 issue required subscribing to news wire services, receiving tips from readers and industry communications departments, reading multiple newspapers and magazines, etc. Notable here is the recognition that amateur radio hobbyists - aka "Hams" - pioneered operation in the microwave realm of the electromagnetic spectrum. Probably the most relevant story here, however, is the passing of John L. Baird, aka "the father of television," who died on June 14th at his home in Sussex, England. He was a relatively young 58 years old. In 1946, most people probably were familiar with the names Marconi as" the father of radio," Morse as the inventor of his eponymous code, Bell as the inventor of the telephone, Goddard as "the father of rocketry," etc., but I'm guessing not many associated the name "Baird" - or any other for that matter - with television...

Many Thanks to Berkeley Nucleonics for Continued Support!

Berkeley Nucleonics Corp - RF CafeBerkeley 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.

The World Within the Atom

The World Within the Atom, August 1959 Popular Electronics - RF CafeAuthor Saunder Harris wrote in this 1959 of edition Popular Electronics magazine that the concept of atoms has been around for more than 2,500 years since Greek philosopher Democritus suggested that a particle existed which was basic to all matter. It has only been in the last century and a half that we have learned that even the atom itself is made up of even more basic particles - the electron, proton, and neutron (J.J. Thompson found the electron in 1897, which was postulated by G. Johnstone Stoney in 1947). It wasn't until the 1930s that even those three entities were thought to be constructed of yet more fundamental particles - quarks, bosons, and leptons. Modern science believes it has fully defined the set of subatomic particles, particularly with the Higgs boson having been finally seen in the Large Hadron Collider (well, maybe). Does anyone really believe this is the final word on fundamental particles after...

InGaAs Biristor for High-Density DRAM

InGaAs Biristor for High-Density DRAM - RF CafeI have to admit to not remembering ever having heard of the term "biristor." It appears in this Semiconductor Today news item entitled, "InGaAs Biristor for High-Density DRAM." "Researchers in Korea have demonstrated capacitor-less 4F2 2-terminal indium gallium arsenide (InGaAs) npn junction dynamic random access memory (DRAM) with a view to highly compact 3D structures. Standard DRAM cells tend to have areas 6-8F2 relative to the process feature size (F) that incorporate 1 transistor and 1 capacitor (1T1C). By removing the need for capacitor storage of the memory state, the cell area can be reduced. The device designed and fabricated by Korea Advanced Institute of Science and Technology (KAIST) and Korea Advanced Nano Fab Center (KANC) used a bistable resistor (biristor) structure (1R0C)...

Ground Resistance and Its Measurement

Ground Resistance and Its Measurement, May 1951 QST - RF CafeAn old electrician's saying goes "Ground is ground the world around," implying that every point on Earth's surface is at the same potential - specifically 0 volts. We know, of course, that it is not so. Maybe on average such a claim could be made, but just as "sea level" is not the same at all points on the ocean's surface (hence we speak of "mean sea level"), neither is the voltage potential the same everywhere. Further, just as the salinity of all points on the ocean surface do not have the same salinity (and thereby conductivity), the conductivity of various places on dry land vary - often significantly. Electric power systems are very concerned with soil electrical conductivity in the vicinity of power generation (source), distribution stations (transmission lines) and end users (load). Soil conductivity measurements are made in critical installations and if necessary, multiple ground rods and/or even chemical enhancements to the soil are used to achieve the required values. Antennas likewise rely on a specific ground potential value to operate according to theoretical calculations (if a "perfect" ground is assumed). When a Yagi antenna...

Promote Your Company on RF Cafe

Sponsor RF Cafe for as Little as $40 per Month - RF CafeNew Scheme rotates all Banners in all locations on the page! RF Cafe typically receives 8,000-15,000 website visits each weekday. RF Cafe is a favorite of engineers, technicians, hobbyists, and students all over the world. With more than 12,000 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.

Thanks to PCB Directory for Continued Support!

PCB  Directory - RF CafePCB Directory is the largest directory of Printed Circuit Board (PCB) Manufacturers, Assembly houses, and Design Services on the Internet. We have listed the leading printed circuit board manufacturers around the world and made them searchable by their capabilities - Number of laminates used, Board thicknesses supported, Number of layers supported, Types of substrates (FR-4, Rogers, flexible, rigid), Geographical location (U.S., China), kinds of services (manufacturing, fabrication, assembly, prototype), and more. Fast turn-around on quotations for PCB fabrication and assembly.

Tuesday the 4th

Clandestine Broadcasters

Clandestine Broadcasters, November 1967 Popular Electronics - RF CafeWhen this "Clandestine Broadcasters" article appeared in a 1967 issue of Popular Electronics magazine, we were at the height of the Cold War era with Communist forces spreading all over the globe and inching closer to the U.S. mainland with moves in the West, north of the Equator. The Cuban Missile Crisis occurred just five years earlier, and the spy game kept all sides busy trying to hide their own secrets and discover the secrets of others. Mysterious radio broadcasts were routinely picked up and reported by Amateur Radio operators and Short Wave Listeners. Their elusive broadcast content and station location enhanced the intrigue for people. Of those, it was the "numbers stations" that garnered the most attention because they issued a string of numbers, then ceased transmission. It was believed to be a means of sending encoded messages to spies. The practice continues to a lesser extent to this day...

Ubiquitous Connectivity to Land, Sea and Sky

Ubiquitous Connectivity to Land, Sea and Sky - RF Cafe"Keeping IoT applications across the world connected is a challenge, yet imperative. The term 'ubiquitous coverage' is often thrown around in the supply chain and logistics industry - and for a good reason. Breaks in the chain of visibility leave logistics vulnerable, especially as businesses scramble to keep up with the introduction of new technologies and services. This is why the challenge lies in finding a universal solution that connects IoT applications all over the world, providing a continuous view no matter where assets are. The first step to improving the deployment of IoT applications is to understand the common obstacles within the industry, like internal operations. Supply chain and logistics have long struggled to streamline internal processes to monitor the flow of goods and services from supplier to customer. And supply chain demands have only exacerbated this challenge..."

Crosley Roamio Automotive Radio

Crosley Roamio Automotive T.R.F. Receiver Models 90, 91 and 92 Radio Service Data Sheet, April 1933 Radio-Craft - RF CafeAs in the past, I am posting these Radio Service Data Sheets as a service to someone who might be doing research on vintage radios and/or restoring one. Roamio is not producing automobile radios anymore, but they did until recently make TiVo recorders and streaming media players. The Crosley Roamio Automotive T.R.F. Receiver Models 90, 91 and 92 was made in the early 1930's at a time when cars and trucks were just starting to experience such luxury. Crosley did not begin manufacturing its own line of cars until 1939, so none of these radios made it into Crosley autos...

Optimal EMC from Shielded Cables

Optimal EMC from Shielded Cables - RF CafeHere is Part 2 of the InCompliance article "Getting the Best EMC from Shielded Cables up to  2.8 GHz." Every day the electromagnetic noise in our environment intensifies as the world goes more and more wireless. Just as PCB layout needed to adopt distributed element methods for successful operation at higher speeds (digital and analog), interconnect cabling has been forced to accommodate frequencies with wavelengths near to or less than the cable length. At high frequencies, cables and shields begin to act like antennas for both emission and absorption. This installment reviews empirical testing done on cable configurations previously discussed. Note: Use this Part 1 link because the one on the page is bad...

RCA "Ultrafax" System

RCA "Ultrafax" System, January 1949 Radio & Television News - RF CafeDon't let the title fool you. This "Ultrafax" system developed by RCA in the late 1940s was essentially the first attempt at video on demand, or streaming video. Rather than piping the signal over cable or local broadcast frequency towers, a microwave link was used. While initial system equipment space and financial requirements meant only corporations, universities, and governments could procure an Ultrafax, engineers who developed the system envisioned an eventual culmination of equivalent systems in every home. Even at the end of the last century it was still not possible for program providers to personalize broadcasts to individuals. It wasn't until broadband Internet came on the scene in the 2000s that such services were possible. Now, a decade later, people watch any video they want on cellphones while riding in a car. We've come a long way, baby...

Promote Your Company on RF Cafe

Sponsor RF Cafe for as Little as $40 per Month - RF CafeNew Scheme rotates all Banners in all locations on the page! RF Cafe typically receives 8,000-15,000 website visits each weekday. RF Cafe is a favorite of engineers, technicians, hobbyists, and students all over the world. With more than 12,000 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.

Please Visit Empower RF's Website in Appreciation of Their Support

Empower RF Systems - RF CafeEmpower RF Systems is a global leader in power amplifier solutions. Empower RF Systems is an established and technologically superior supplier of high power solid state RF & microwave amplifiers. Our offerings include modules, intelligent rack-mount amplifiers, and multi-function RF Power Amplifier solutions to 6 GHz in broadband and band specific designs. Output power combinations range from tens of watts to multi-kilowatts. Unprecedented size, weight and power reduction of our amplifiers is superior to anything in the market at similar frequencies and power levels.

Monday the 3rd

Color Code Quiz

Color Code Quiz, November 1967 Popular Electronics - RF CafeEven those of us old enough to remember the days when nearly all electronic components had identification markers on them find it challenging to correctly interpret color codes on resistors, capacitors, and inductors. The numbers are easy enough to remember, but getting tolerances and temperature coefficients correct is not guaranteed. Usually the color bands on a component are biased toward one end so there is no ambiguity as to where to begin decoding, but I have seen plenty where getting the right interpretation is a crap shoot unless the last band happens to be gold or silver. Gold and silver have no numbers associated with them, but brown and red are also used for tolerance (brown:±1%, red:±1%, respectively). Reading capacitor dots can also be a little tricky, but after you've read a few, it's a piece of cake...

Folded and Loaded Antennas

Folded and Loaded Antennas, April 1953 QST - RF CafeHere is a fairly major treatise on folded and loaded antennas that appeared in a 1953 issue of QST magazine, with "Suggestions for Mobile and Restricted-Space Radiators." It is not for the faint of heart or anyone with math phobia or math anxiety. Integral calculus is part of the presentation, although an understanding of calculus is not required to get the gist of the article. Equations for calculating the antenna configuration radiation resistances are given for the 3λ/4-wave folded dipole, the λ/8-wave folded monopole, the bottom-, center- and top-loaded λ/8-wave monopole, the bottom-loaded λ/16-wave monopole, and the λ/4-wave monopole folded twice, to name a few...

Please Visit Triad RF Systems to Thank Them for Their Support

Triad RF SystemsTriad RF Systems designs and manufactures RF power amplifiers and systems. Triad RF Systems comprises three partners (hence 'Triad') with over 40 years of accumulated knowledge of what is required to design, manufacture, market, sell and service RF/Microwave amplifiers and amplifier systems. PA, LNA, bi-directional, and frequency translating amplifiers are available, in formats including tower mount, benchtop, rack mount, and chassis mount. "We view Triad more as a technology partner than a vendor for our line-of-sight communications product line." Please check to see how they can help your project.

FOD Discovered on Mars!

NASA Ingenuity 'Copter Picks up FOD on Mars - RF CafeThis is kind of weird. It's either a phenomenal discovery or bad news for the Ingenuity coaxial helicopter making the airborne rounds on Mars. The video clip shows the 'copter descending without anything hanging from its landing gear leg, and then there is a wispy object dangling from it after taking off again. It looks like a weak water flow from an aerated faucet - which obviously it cannot be - or maybe a piece of Saran Wrap - which it also cannot be (... or could it be litter from a Martian's sandwich?). NASA has designated it as Foreign Object Debris (FOD). It'll be interesting to learn of NASA's conclusion.

Synzen Low-Profile 5G and 4G LTE Antennas

Synzen Low-Profile, Compact 5G and 4G LTE Antennas - RF CafeSynzen Precision Technology has unveiled ALCOR and ATRIA - two new low-profile antennas which are perfect for the wearable market or any IoT devices which require an ultra-slim design. Both designs deliver excellent performance at a limbo-defying height of only 1.6 mm. ALCOR is a 5G low-profile surface mount antenna that has been developed to be compact but still cover bands from 617-6000 MHz. It has a small footprint of 40 x 10 x 1.6 (mm) and a fallback to 4G/3G/2G. ATRIA is even more compact but still covers bands from 698-2690 MHz (also falls back to 3G/2G). It measures only 30.0 x 7.0 x 1.6 (mm) and requires a small clearance area (don't be fooled by claims of small antennas which often need a much bigger clearance area)...

Arvin Models 444 Tabletop Radio

Arvin Models 444, 444A Tabletop Radio, November 1946 Radio News - RF CafeThis schematic and parts lists for the Arvin model 444 and 444A tabletop radio were scanned and OCR'ed from the November 1946 issue of Radio News magazine. It was a compact, stylish, and affordable radio for the early post-World War II era. From what I can find, it was built in the 1945-1946 timeframe, so it was one of the first having been newly made radios after the three to four year suspension of domestic electronics production while the War Powers Act allowed the government to mandate companies dedicate capacity to wartime products. 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. This is an abbreviated version of the very informational Radio Service Data Sheets usually printed...

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...

Many Thanks to Anatech Electronics for Long-Time Support!

Anatech Electronics logo - RF CafeAnatech Electronics (AEI) manufactures and supplies RF and microwave filters for military and commercial communication systems, providing standard LP, HP, BP, BS, notch, diplexer, and custom RF filters, and RF products. Standard RF filter and cable assembly products are published in our website database for ease of procurement. Custom RF filters designs are used when a standard cannot be found, or the requirements dictate a custom approach for your military and commercial communications needs. Sam Benzacar's monthly newsletters address contemporary wireless subjects. Please visit Anatech today to see how they can help your project succeed. 

Sunday the 2nd

RF Themed Crossword Puzzle for October 2nd

RF Themed Crossword Puzzle for October 2nd, 2022 - RF CafeHere is your custom made RF-themed crossword puzzle for October 2nd, 2022. There are at least 16 instances of this puzzle's theme included. All RF Cafe crossword puzzles are custom made by me, Kirt Blattenberger, and have only words and clues related to RF, microwave, and mm-wave engineering, optics, mathematics, chemistry, physics, and other technical 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!

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...

Many Thanks to ConductRF for Continued Support!

ConductRF coaxial cables & connectors - RF CafeConductRF is continually innovating and developing new and improved solutions for RF Interconnect needs. See the latest TESTeCON RF Test Cables for labs. ConductRF makes production and test coax cable assemblies for amplitude and phased matched VNA applications as well as standard & precision RF connectors. Over 1,000 solutions for low PIM in-building to choose from in the iBwave component library. They also provide custom coax solutions for applications where some standard just won't do. A partnership with Newark assures fast, reliable access. Please visit ConductRF today to see how they can help your project! 

   

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Copyright: 1996 - 2024

Webmaster:

    Kirt Blattenberger,

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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...

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