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Homepage Archive - October 2023 (page 1)

See Page 1 | 2 | 3 | 4 | of the October 2023 homepage archives.
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Friday the 6th

Electronics-Themed Comics from January 1963 Electronics World

Electronics-Themed Comics from January 1963 Electronics World - RF CafeHere are a couple more electronics-themed comics from Electronics World, good for winding down the week. They appeared in the January 1963 issue. The page 86 comic reminds me of the professor I had for solid state circuit design. He was supposedly the first person to successfully use gallium arsenide (GaAs) as a semiconductor, although he also did pioneering work with silicon. Anyway, Prof. Anderson would say he takes at least one "business" trip each year to Portugal in order to search for higher quality raw semiconductor material in sand on the beaches. He spoke Portuguese, BTW. The page 89 comic is reminiscent of the pre-GPS days of navigation. Raise you hand if you ever drove around utterly lost while looking for an off-the-beaten-path location. How about driving through an unfamiliar city using a crummy paper map, and then hitting a blocked off or missing road? Since getting my first GPS in the 2011 Jeep Patriot, I rarely drive anywhere without the moving map displayed and the nice lady in the dashboard providing reminders for when to turn...

Early AI: Texas Instruments' Clarance the Stack-A-Round Clown

Early AI: Texas Instruments' Clarance the Stack-A-Round Clown - RF CafeIn 1991, Texas Instruments proudly introduced "The first electronic stacker for infants and toddlers." Clarance the Stack-A-Round Clown features five layers of rotatable, flippable head/face rings that can be disassembled and reassembled by the player, with each removal and replacement of a ring initiating a spoken phrase by Clarance. How I came to own this mildly interesting toy is a story unto itself (see below). I could not resist the urge to take the Stack-A-Round Clown apart to see what makes him tick (or talk, as the case happens to be). As shown in the photos, all the electronic heavy lifting is performed by a single speech synthesizer IC package by TI (part number CSM11057AN with 1991 date code - could not locate a datasheet). Otherwise there are just a few scattered Rs, Ls, and Cs, with a couple discrete transistors. Six switches are fabricated from a simple arrangement of spring metal fingers that make contact with pads on the PCB. The five plastic head ring layers are keyed to activate specific switches to make Clarance speak...

Anatech Electronics Intros 3 Filter Models for October 4th, 2023

Anatech Electronics Intros 3 Filter Models for October 4th, 2023 - RF CafeAnatech Electronics offers the industry's largest portfolio of high-performance standard and customized RF and microwave filters and filter-related products for military, commercial, aerospace and defense, and industrial applications up to 40 GHz. Three new filters have been announced for October 2023: a 2260 MHz cavity bandpass filter with a maximum 2 dB insertion loss over a bandwidth of 80 MHz, a 2350 MHz cavity bandpass filter with a 300 MHz bandwidth, and a highpass filter with a rejection of 40 dB minimum at 800 MHz. Custom RF power filter and directional couplers designs can be designed and produced with required connector types when a standard cannot be found, or the requirements are such that a custom approach is necessary...

The Hall Effect

The Hall Effect, April 1963 Electronics World - RF CafeHall effect devices are used not just for magnetic field measurements, but also for for current and power measurements and as function generators, transducers, multipliers, and isolators. The Hall effect, discovered by Edwin Hall, comes into play when a stationary current-carrying conductor is located in a magnetic field, where electrons within the conductor are forced into a distribution that favors one side of the conductor. The result is a difference of potential across the conductor which is directly related to magnetic field strength by a well-defined equation, permitting measurement of the magnetic field. A gaussmeter works on that principle. Since a Hall device's output is proportional to the product of the control current and the magnetic field, and the magnetic field determines the Hall voltage, power can be determined with the devices as well.

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, Baseball Caps, and more, all sporting my amazingly clever "RF Engineers - We Are the World's Matchmakers" Smith chart design. These would make excellent gifts for husbands, wives, kids, significant others, and for handing out at company events or as rewards for excellent service. My graphic has been ripped off by other people and used on their products, so please be sure to purchase only official RF Cafe gear. I only make a couple bucks on each sale - the rest goes to Cafe Press. It's a great way to help support RF Cafe. Thanks...

Thanks to TotalTemp Technologies for Continued Support!

TotalTemp Technologies - RF CafeTotalTemp Technologies has more than 40 years of combined experience providing thermal platforms. Thermal Platforms are available to provide temperatures between -100°C and +200°C for cryogenic cooling, recirculating & circulating coolers, temperature chambers and temperature controllers, thermal range safety controllers, space simulation chambers, hybrid benchtop chambers, custom systems and platforms. Manual and automated configurations for laboratory and production environments. Please contact TotalTemp Technologies today to learn how they can help your project.

Thursday the 5th

Potentiometer Quiz

Potentiometer Quiz, September 1962 Popular Electronics - RF CafeHere is yet another of Robert Balin's many electronics-related quizzes which he created for Popular Electronics magazine (see big list of others at bottom of page). This Potentiometer Quiz showed up in the September 1962 issue. Since the basics of potentiometers have not changed since the first variable resistor was created, it is still a useful challenge for today - and tomorrow. The unique aspect of this quiz is that the potentiometer is connected in series and/or parallel with other fixed resistors in a manner where the output voltage is not necessarily a linear function of where the wiper arm lies along the pot. A DC source (battery) is used, and there are no reactive or nonlinear elements, so that simplifies things considerably. Still, it might take some head scratching to arrive at the correct conclusion for some of them. Assume the output waveform is linear along the abscissa as the potentiometer is adjusted through its resistance range...

Hexagonal Boron Nitride 3D Microcircuit Thermal Control

Hexagonal Boron Nitride 3D Microcircuit Heat - RF Cafe"Researchers at Nanyang Technological University in Singapore have developed a solution that prevents overheating in the next generation of energy efficient, high-performance 3D-stacked electronic devices. 3D-stacked electronics are made of interconnected vertical layers of chips that are prone to overheating because densely packed components prevent heat from escaping. Now, using magnetic fields to align and orient nanoparticles of hexagonal boron nitride (BN), a team of scientists, led by Nanyang's Hortense Le Ferrand of NTU's School of Mechanical and Aerospace Engineering, was able to channel heat away from their sources. The researchers first coated particles of BN with iron oxide to make them responsive to magnetic fields. They then suspended the coated particles in a solvent and used a magnetic field to align the particles in different orientations.''"

New Uses for Hall-Effect Modulators

New Uses for Hall-Effect Modulators, January 17, 1964 Electronics Magazine - RF CafeAccording to author Albert Hilbinger, good dynamic range down to DC and circuit simplicity offset the low efficiency of Hall-effect modulators. The mixer circuit output has a suppressed carrier signal, making it a true product of the two inputs (fLO ± IF in the frequency domain). Evidently the scheme never gained wide acceptance in the industry because a search of the term does not produce much - other than this article. Achieving a suppressed carrier with standard diode mixers requires a quadrature arrangement using two mixers and a pair of 90° power splitters, which nowadays is done handily within a single integrated circuit. Sensors are the main exploitation for the Hall effect these days. They are widely used as proximity sensors, speed sensors, position sensing, and current sensing...

Werbel Microwave 2-Way Power Divider/Combiner for 2-18 GHz

Werbel Microwave Intros 2-Way Power Divider/Combiner for 2-18 GHz - RF CafeModel D-2182 from Werbel Microwave is a 2-way power splitter / combiner covering the continuous bandwidth of 2 to 18 GHz. It covers a wide spectrum of applications including cellular, satellite distribution, radar, and military radio. With proprietary techniques, typical phase balance of <2 degrees at 18 GHz is achieved in mass production. Extremely low insertion loss of 0.5 dB at 18 GHz and high isolation and return losses of 20 dB. A light weight and compact aluminum enclosure with stainless steel female SMA connectors. The device is RoHS compliant. This part has versatile mounting options. Standard thru holes mount the part from the broad surface...

Transmitters Towed Through Air Tests Antenna's Radiation Pattern

Transmitters Towed Through Air Tests Antenna's Radiation Pattern, October 18, 1965 Electronics Magazine - RF Cafe"Xeledop" is the Word of the Day for October 6; use it often. Xeledop is an acronym for "transmitting elementary dipole with optional polarity." Nope, I've never heard of it, either. The Xeledop (probably pronounced "zeh'-le-dop") is an air-towed transmitter that flies a pre-planned path around the ground-based antenna under test (AUT) whose radiation pattern is being measured. The circular power level plot at the bottom of the page shows the results of an actual test flight. In this application, a high frequency (HF, 3-30 MHz) transmitter is towed behind an airplane like target drone while it broadcasts signals at eight distinct frequencies toward the AUT, while the downstream receiver records power levels. The pilot flies on the surface of an imaginary hemisphere to maintain a constant radius from the antenna. Ground equipment tracks the aircraft azimuth and slant range is calculated using aircraft altimeter data and measured elevation angles. Both horizontal and vertical radiation patterns can be measured. A VHF model was also tested...

Please Thank IPP for Their Long-Time Support!

Innovative Power ProductsInnovative Power Products has been designing and manufacturing RF and Microwave passive components since 2005. We use the latest design tools available to build our baluns, 90-degree couplers, directional couplers, combiners/dividers, single-ended transformers, resistors, terminations, and custom products. Applications in military, medical, industrial, and commercial markets are serviced around the world. Products listed on the website link to detailed mechanical drawings, electrical specifications, and performance data. If you cannot find a product that meets your requirements on our website, contact us to speak with one of our experienced design engineers about your project.

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!

Wednesday the 4th

Plain English Rules - Citizens Band Radio Service

Plain English Rules - Citizens Band Radio Service - RF CafeThis "Plain English Rules - Citizens Band Radio Service" pamphlet was included in the box with my Realistic (Radio Shack) TRC-409 Portable Citizens Band Radio. Prepared by the Federal Communications Commission, Washington, D.C. Part 95, Subpart 0 - Citizens Band (CB) Radio Service General Provisions §95.401 (CB Rule 1) What is the Citizens Band (CB) Radio Service? The CB Radio Service is a private, two-way, short-distance voice communications service for personal or business activities. The CB Radio Service may also be used for voice paging. §95.402 (CB Rule 2) How do I use these rules? (a) You must comply with these rules (See CB Rule 21 §95.421, for the penalties for violations) when you operate a station in he CB Service from: (1) Within or over the territorial limits of places where radio services are regulated by the FCC (see CB rule 5, §95.405); (2) Aboard any vessel or aircraft registered in the United States; OR (3) Aboard any unregistered vessel or aircraft...

China Building Particle Accelerator for Litho

China Building Particle Accelerator for Litho - RF Cafe"China plans to build a huge particle accelerator for advanced IC lithography in an attempt to sidestep the need for ASML's EUV machines. The plan is to build a particle accelerator with a circumference of between 100-150 m (328-492 ft). A site has not yet been chosen but the intention is to have the accelerator serve multiple litho machines acting as a foundry hub. The science behind the plan is the Stanford-developed steady-state microbunching (SSMB) approach which uses the energy released by charged particles during acceleration to act as a light source. 'The main challenge lies in guiding the distribution of electrons within the storage ring of the accelerator, causing them to achieve collective synchronous radiation,' according to Stanford Prof Zhao Wu, who originally proposed the technology in 2010. The device could produce high-quality radiations from terahertz waves at a wavelength of 0.3 mm to EUV waves at wavelengths of 13.5 nm. Unlike free-electron lasers, which produce pulsed lasers with high peak power, SSMB sources produce continuous light with high average power..."

Frequency & Time Standards

Frequency & Time Standards, August 1964 Electronics World - RF CafeIt was not until 1963 that the International Committee of Weights and Measures (CIPM) adopted the cesium clock as the world scientific community's standard time reference. It boasted an accuracy that kept it within 1.1 parts in 100 billion, meaning it would not gain or lose more than a second in 3 thousand years. To show how far technology has advanced since 1963, in April of 2014 the National Institute of Standards and Technology (NIST) launched a new atomic clock called NIST-F2 (also cesium-based) to serve as a new U.S. civilian time and frequency standard. NIST-F2 would neither gain nor lose one second in about 300 million years - a factor of 10 thousand. According to the U.S. Navy's official Time.Gov website, the Internet time reported on my computer was 1 minute and 37 seconds behind official U.S. time. This is not surprising since by default Windows only re-syncs with the network once every 7 days. That means my computer clock isn't much more accurate than a cheap old spring-driven wind-up watch. Going into the clock settings window and clicking on the "Update" button brought the computer clock back into sync with the NIST server clock...

Wireless Emergency Alerts Test - Oct. 4th

Wireless Emergency Alerts (WEA) and Emergency Alert System - RF CafeFEMA and FCC Plan Nationwide Emergency Alert Test is scheduled for Wednesday, October 4, 2023. Test messages will be sent to all TVs, radios and cellphones. The national test will consist of two portions, testing Wireless Emergency Alerts (WEA) and Emergency Alert System (EAS) capabilities. Both tests are scheduled to begin at approximately 2:20 p.m. ET. The WEA portion of the test will be directed to all consumer cell phones. This will be the third nationwide test, but the second test to all cellular devices. The test message will display in either English or in Spanish, depending on the language settings of the wireless handset. The EAS portion of the test will be sent to radios and televisions. This will be the seventh nationwide EAS test. The purpose of the test is to ensure that the systems continue to be effective means of warning the public about emergencies, particularly those on the national level. As part of the test, surveillance and function disabling software will be installed on all devices capable of supporting it. ;-)

YL News and Views

YL News and Views, July 1966 QST - RF Cafe"YL" in amateur-ese stands for "young lady." It refers to any ham operator of the female gender regardless of age. I don't know how many women were Hams in 1966 when this article appeared in QST, but according to Communities of the Air: Introducing Radio to the World, author Susan M. Squier, by 2003 women made up 40% of new license applicants. Judging by amateur radio club rosters and field day events, YLs don't make up anywhere near 40% of the Ham population, but maybe they just tend to shun the public light. A 2008 presentation on the YL Radio Website estimated 15% in 2000. I searched around the Young Ladies Radio League (YLRL), American Radio Relay League (ARRL) and the Federal Communications Commission (FCC) websites for current statistics but could not find anything specifically about the percentage split between males and women. On a side note, the first licensed YL in the U.S. was Emma Chandler...

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...

Thanks to Axiom Test Equipment for Continued Support!

Axiom Test Equipment - RF CafeAxiom Test Equipment allows you to rent or buy test equipment, repair test equipment, or sell or trade test equipment. They are committed to providing superior customer service and high quality electronic test equipment. Axiom offers customers several practical, efficient, and cost effective solutions for their projects' TE needs and is committed to providing superior customer service and high quality electronic test equipment. For anyone seeking a way to offload surplus or obsolete equipment, they offer a trade-in program or they will buy the equipment from you. Some vintage items are available fully calibrated. Please check out Axiom Test Equipment today - and don't miss the blog articles!

Tuesday the 3rd

Capitol Radio Engineering Institute Home Study Program

The Capitol Radio Engineering Institute Home Study Program, September 1963 Radio-Electronics - RF CafeCapitol Radio Engineering Institute (CREI) was a major player in the home study industry, having been established in 1927 at the beginning of the rapidly growing field of electronics. As computers came on the scene, CREI changed its name to Capitol Institute of Technology in order to diversify its training. Now known as Capitol Technology University, curriculums through doctorate level are offered for astronautics and aeronautics, electronics, computers, robotics, software, cybersecurity, and other high tech arenas. I like their motto: "It's 2023. Every job is a technology job." In 1963 when this four-page spread appeared in Radio-Electronics magazine, the world's superpowers (primarily the U.S. and U.S.S.R.) were deep into the Space Race, seeking to establish dominance and superiority in the realms of manned spaceflight and satellite deployment. The effort really took off (pun intended) in the mid-to-late 1950s during the International Geographical Year (IGY) efforts by a consortium of countries to learn as much as possible about the Earth's upper atmosphere and outer space. As with aeronautics and aircraft flight, the public was enthralled with the concepts of space flight...

Measuring Distortion in Audio-Frequency Amplifiers

Measuring Distortion in Audio-Frequency Amplifiers, May 1941 Radio-Craft - RF CafeAs with so many topics, the basics of topics like harmonic distortion (and other forms of distortion) in an amplifier circuit has not changed much - if at all - over the decades. Test equipment and circuits being measured get more advanced, but, especially if you are new to the concept, articles like this one on audio-frequency distortion from a 1941 edition of Radio-Craft magazine are as useful today as it was when it was written. When studying, in particular, harmonic distortion, having a knowledge of the Fourier series for common waveforms like triangle waves, sawtooth waves, square waves, and even a semi-circle- shaped wave is especially enlightening since it explains a lot of waveform shapes where harmonics are present...

Babylonian Clay Trigonometry Table Found

Babylonian Clay Trignomometry Tablet - RF Caf"At least 1,000 years before the Greek mathematician Pythagoras looked at a right angled triangle and worked out that the square of the longest side is always equal to the sum of the squares of the other two, an unknown Babylonian genius took a clay tablet and a reed pen and marked out not just the same theorem, but a series of trigonometry tables which scientists claim are more accurate than any available today. The 3,700-year-old broken clay tablet survives in the collections of Columbia University, and scientists now believe they have cracked its secrets. The team from the University of New South Wales in Sydney believe that the four columns and 15 rows of cuneiform – wedge shaped indentations made in the wet clay – represent the world's oldest and most accurate working trigonometric table, a working tool which could have been used in surveying, and in calculating how to construct temples, palaces and pyramids..."

Connubially-Oriented Computer of Otto Tronix

Connubially-Oriented Computer of Otto Tronix, July 1966 Popular Electronics - RF CafeAdmittedly, I needed to look up the meaning of "connubial" when seeing the title of this tongue-in-cheek article by Carl Kohler in the July 1969 issue of Popular Electronics magazine. Nobody knows for sure whether the over-enthusiastic starring male in the series of techie stories that ran in Popular Electronics magazine in the 1950s was actually Carl himself or an alter ego version of himself. Carl was also the artist of numerous tech-related comics. His wife, affectionately referred to as "Old Big Eyes" and a certified "lady-telepath" is always quick to recognize the impending disaster about to ensue, often with her as an unwilling participant. This episode deviates a bit from the already-married type to report on the exploits of born loser Otto Tronix...

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...

Thanks to Windfreak Technologies for Continued Support!

Windfreak TechnologiesWindfreak Technologies designs, manufactures, tests and sells high value USB powered and controlled radio frequency products such as RF signal generators, RF synthesizers, RF power detectors, mixers, up / downconverters. Since the conception of WFT, we have introduced products that have been purchased by a wide range of customers, from hobbyists to education facilities to government agencies. Worldwide customers include Europe, Australia, and Asia. Please contact Windfreak today to learn how they might help you with your current project.

Monday the 2nd

Radio-Electronics News Briefs

News Briefs, September 1963 Radio-Electronics - RF CafeWhen this 1963 issue of Radio-Electronics magazine was published, scientists were at the early stages of understanding the ionosphere. We tend to take our knowledge of it for granted now because so much has been learned about it in the subsequent six decades. In April of 1961, Russia launched Yuri Gagarin into space, traversing the ionosphere to attain a 200-mile orbital altitude. The ionosphere ranges between about 50 and 400 miles high, depending on solar activity. Charge data was/is necessary in order to take proper precautions for shielding electronics and life from its potentially harmful effects. Sounding rockets were a major player in the investigation. Moving on, the comments made by Bell Lab's research directory John R. Pierce regarding the usefulness of a computer for data retrieval (versus data calculation) are great fodder for some of the world's stupidest proclamations. Read on to see what I mean. Finally, the numerical prefixes "femto" (10-15) and "atto" (10-18) had just been added to the lexicon of science and mathematics...

Broadcast Brevities

Broadcast Brevities, March 9th, 1932 The Wireless World Article - RF CafeAs the old saying goes, "The more things change, the more things stay the same." Incredibly, back in 1931 people were complaining about shrinking office cubicle sizes. To wit: "At 'Broadcasting House' rooms measuring 8ft. x 6ft. are being coveted by the many people who will be condemned to labour in cubicles 7ft. x 5ft. The Civil Engineer himself, who helped to design and erect the building, works in a compartment in which, as the American said, 'You couldn't cuss a cat without getting hair on your teeth.'" ...and whoa!, dig this statement by the author regarding the demise of "local oscillators" in the UK (noisy regenerative Rx LO interference*): "Steps might be taken to ensure the survival of a few specimens, perhaps by the founding of a national reservation similar to those which accommodate the Red Indians in America. The few remaining squealers and their squaws could then re-radiate to their hearts' content..."

Early Electronic Warfare (EW)

"Introduction to Electronic Warfare" U.S. Army Security Training Center and School - RF CafeRF Cafe website visitor Ken H. sent me two PDF files containing "Introduction to Electronic Warfare" (v1, v2) from the U.S. Army Security Training Center and School, published after the Korean War (no date given, but 1959 appears in the manual). Most of the information refers to  World Wars I and II. It begins with the history of EW in the early days of radio with France and Austria, c1908. The science evolved into electronic countermeasures (ECM) and electronic counter counter measures (ECCM). ECNM, where N is the number of C's, is not discussed ;) If you are a fan of government acronyms and clever nomenclatures, then you'll love this text. Meaconing (masking beacon), Headache and Aspirin, Ruffian and Bromide, Starfish, Benito and Domino, Freya, Wurzburg, Window, Carpet, Rug, Jackal, and Airborne Cigar are amongst the plethora of systems and tactics. Both (or all) sides, continuing into today, are constantly devising ways to surveil the enemy and to thwart the efforts of the enemy to surveil you. The entire EW scenario is reminiscent of the old Spy vs. Spy comic from Mad magazine. Although not mentioned in this text since it was not sufficiently developed until after WWII, a good example of early ECM is the frequency-hopping spread spectrum secure broadcast system dreamed up by Hedy Lamarr.

Sparton Selectronne Receiver Models 1068 Data Sheet

Sparton Selectronne Receivers Models 1068 and 1068X, December 1937 Radio-Craft - RF CafeWell shazam, I found a radio service datasheet that had been missed. This one for the Sparton Selectronne Model 1068 brings the grand total to 220 that have been scanned and posted here on RF Cafe. They appeared in various formats in Radio-Craft, Radio News, and Radio & Television News magazines. It was in the 1930s that pushbutton tuning appeared in most radio sets, both tabletop and floor-sitting console models. Those mechanical pushbutton tuner mechanisms were pretty impressive. The Selectronne also sported a popular visual tuning indicator called the Viso-Glo tube. It was not a true cat's eye in that the relative brightness of the tube's glow changed with the received station signal strength, rather than the width of the illuminated area changing...

Promote Your Company on RF Cafe

Sponsor RF Cafe for as Little as $40 per Month - RF CafeBanner Ads are rotated in all locations on the page! RF Cafe typically receives 8,000-15,000 visits each weekdayRF Cafe is a favorite of engineers, technicians, hobbyists, and students all over the world. With more than 17,000 pages in the Google search index, RF Cafe returns in favorable positions on many types of key searches, both for text and images. Your Banner Ads are displayed on average 225,000 times per year! 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. If you need your company news to be seen, RF Cafe is the place to be...

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.

Sunday the 1st

Electronics Theme Crossword for October 1st

Electronics Theme Crossword Puzzle for October 1st, 2023 - RF CafeThis custom RF Cafe electronics-themed crossword puzzle for October 1st contains words and clues which pertain exclusively to the subjects of electronics, science, physics, mechanics, engineering, power distribution, astronomy, chemistry, etc. If you do see names of people or places, they are intimately related to the aforementioned areas of study. Being that "A" is the 1st letter of the alphabet, it is used as the first and/or last letter of many words in today's crossword puzzle - as well as in-between. Those clues are marked with an asterisk (*, or **, depending on the number of them in the word). As always, you will find no references to numbnut movie stars or fashion designers. Need more crossword RF Cafe puzzles? A list at the bottom of the page links to hundreds of them dating back to the year 2000. 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, Baseball Caps, and more, all sporting my amazingly clever "RF Engineers - We Are the World's Matchmakers" Smith chart design. These would make excellent gifts for husbands, wives, kids, significant others, and for handing out at company events or as rewards for excellent service. My graphic has been ripped off by other people and used on their products, so please be sure to purchase only official RF Cafe gear. I only make a couple bucks on each sale - the rest goes to Cafe Press. It's a great way to help support RF Cafe. Thanks...

Thanks to Anritsu for Their Support!

Anritsu (electronics test equipment) - RF CafeAnritsu has been a global provider of innovative communications test and measurement solutions for more than 120 years. Anritsu manufactures a full line of innovative components and accessories for RF and Microwave Test and Measurement Equipment including attenuators & terminations; coaxial cables, connectors & adapters; o-scopes; power meters & sensors; signal generators; antenna, signal, spectrum, & vector network analyzers (VNAs); calibration kits; Bluetooth & WLAN testers; PIM testers; amplifiers; power dividers; antennas. "We've Got You Covered."

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.

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Exodus Advanced Communications Best in Class RF Amplifier SSPAs