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Homepage Archive - October 2022 (page 2)

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

Friday the 14th

Service from the Customer's Viewpoint

Service from the Customer's Viewpoint, March 1956 Radio-Electronics - RF CafeBeing a repairman of any sort has always resulted in a wide variety of customer responses. Of course poor technicians deserve all the derision they receive, but good technicians often catch a boatload of grief whether or not their efforts result in success. Nobody wants to pay more money than he has to, but too often the owner of a property who is in desperate need of knowledgeable help has a sudden change from gratitude for the technician's willingness to take on the challenge to maniacal repulsion when informed of the cost. I have always endeavored to perform as much needed labor myself as possible, whether it be car repairs, home maintenance, appliance fixing, electronics troubleshooting, etc. However, there are some things you simply cannot do for yourself either because of a lack of knowledge, lack of necessary equipment, or government licensing. On those occasions, I try to remember be as polite and gracious as possible, even after being presented with a bill including $90 per hour for a car mechanic...

Wireless Power Beaming - DARPA

Wireless Power Beaming DARPA - RF Cafe"DARPA is working on the next leap forward in energy distribution by leveraging wireless power beaming to create a dynamic, adaptive, speed of light wireless energy web. The goal of the POWER program is to design and demonstrate airborne optical energy relays. These relays are a critical component necessary to allow ground-sourced lasers to be coupled with high-altitude, efficient long-range transmission. Additionally, such relays will enable future multi-path wireless energy networks. 'This is the internet for energy - harnessing resilient, multipath networks to flow energy from abundant sources to energy-starved consumers,' said Col Paul Calhoun, POWER program manager in DARPA's Tactical Technology Office. 'The military faces particularly acute energy challenges, which are driving this innovation. We often must operate far from established energy infrastructure and rely on liquid fuels that require precarious supply lines..."

A New Pocket Radio

A New Pocket Radio, January 1955 Radio & Television News - RF CafeThis Regency TR-1 transistor radio and leather pouch will probably have been sold on eBay long ago by the time most people see it, but there seems to be an ample supply available for collectors if you are willing to either pay a small fortune for a well-preserved copy like this one, or accept some wear and tear on a lesser copy. Not surprisingly, there is a website dedicated to only the Regency TR-1 transistor radio and its history from development through retail sales. As reported in this January 1955 issue of Radio and Television News magazine, the TR-1 was the world's first commercially available, fully transistorized portable radio. A complete schematic and functional description is provided. It used four germanium transistors and operated on a 22-1/2 volt battery, which provided about twenty hours of listening pleasure. The unit weighed eleven ounces and cost $49.95. It had just been released to the public the previous year...

R&S Completes RAAF Air Ground Air Transition Project

Rohde & Schwarz Successfully Completes RAAF Air Ground Air Transition Project - RF CafeAs a communications systems integrator (CSI) for the Air Ground Air Transition (AGAT) project lead by BAE Systems, Rohde & Schwarz Australia has completed its scope of work in 16 months, despite challenges imposed by the global health crisis. "Working to a tight project schedule, our team has again been equal to the task," says Managing Director Rohde & Schwarz Australia Gareth Evans. "This work included provision of over 300 CERTIUM radios and ancillaries, CERTIUM VCS-4G as the backup voice communications system and CERTIUM management systems for 12 defense aerodromes across Australia." "To set up a team and design, deliver and integrate these systems to achieve the factory acceptance test milestones in under 5 months, and subsequently deliver the systems for 12 sites over the next 11 months..."

Tone Modulator for Radio Control

Tone Modulator for Radio Control from April 1958 Radio-Electronics Magazine - RF CafeDeclaring any kind of straight LC tank circuit to be high stability is a bit of a stretch when compared to the Q available simply by adding a crystal, even in 1958. Tone modulation was an early method for achieving remote control of model airplanes, boats, and cars. The number of channels with these tone modulation systems is two times the number of modern proportional systems in that moving the rudder left took one channel and moving it right took another. Up and down elevator likewise took two channels. Therefore, this four channel system is only two channels by today's terminology. Technology evolved into fully proportional systems on crystal-controlled 27 MHz using pulse position modulation (PPM), then to 72 MHz, and today nearly every every R/C uses a combination of frequency-hopping spread spectrum (FHSS) and direct-sequence spread spectrum (DSSS) in the 2.4 GHz ISM band...

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

/jobs.htm" target="_top"> 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 /jobs.htm" target="_top">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 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.

Thursday the 13th

50 Years of Home Radio

50 Years of Home Radio, March 1956 Radio-Electronics - RF CafeAccording to Radio-Electronics magazine editor Hugo Gernsback, 1955 marked the 50th anniversary of "home radio." You would be excused for maybe thinking the world's first home radio set was one of the early "tombstone" style tabletop radios in a stylish wooden case, with a dial on the front for tuning one of the relatively few (at the time) AM stations, and sometimes even shortwave. In actuality, it the TELIMCO Wireless Telegraph Outfit; the only audio signal it emitted was fixed tone indicating a dit or a dah. Music and speaking came a couple years later. Pittsburgh radio station KDKA is famously the first commercial radio broadcaster, which began operation in 1920. Here are some KDKA articles: Photographic History of Radiotelephony, Half a Century of Electronics Publishing...

Capacitor Design Techniques for EMC

Capacitor Design Techniques for EMC - RF CafeThis "Capacitor Design Techniques for EMC" article is a whole year old - practically an eternity in today's environment - but it is still relevant and useful. Author Min Zhang begins: "A discussion on the subject of capacitors could easily become a book or a dictionary. To start with, there are different types of capacitors such as electrolytic, film, ceramic capacitors, and so on. Then, within the same type, there are different dielectric materials. There are also different classes. As for physical construction, there are two-terminal and three-terminal capacitor types. There's also an X2Y type capacitor which essentially is a pair of Y-capacitors packaged in one2. What about supercapacitors? The fact is, if you sit down and start reading the capacitor selection guide of major manufacturers, you could easily spend a day..."

Electrolytic Condenser "Blows Its Top"

Electrolytic Condenser "Blows Its Top", January 1947 Radio News - RF CafeWho among us has not purposely hooked up a power supply to an electrolytic capacitor and turned up the voltage until it popped? It was a ritual for new guys in the shop. Admittedly, the ones I've blown up were insignificant compared to the one shown in this January 1947 Radio News magazine photo where the staff at Daven Labs reproduced a test failure and was sure to be rolling film during the process. Hopefully, no one was in the room either time. The Daven Company made passive components for radios and other types of electronics. An eBay search turns up some of their vintage equipment. The newspaper clipping (below, right) reporting the purchase of the Daven Company in 1960 was retrieved using my Newspapers.com subscription...

Antenova Invicta 2.4 GHz Antenna for Tiny Bluetooth, WiFi, ZigBee

Antenova's Invicta 2.4 GHz Antenna Gives Wider Coverage for Tiny Bluetooth, Wi−Fi, and ZigBee Designs - RF CafeAntenova Ltd, the UK-based manufacturer of antennas and RF antenna modules for IoT and M2M, is releasing a new, compact and very efficient antenna for the Wi-Fi, Bluetooth and ZigBee frequencies at 2.4 - 2.5 GHz. This new antenna is named Invicta, part number SRFW082. The Invicta antenna averages efficiency of 70% across the 2.4 GHz band. Consequently designs using this antenna will operate better, over longer distances and through walls and obstacles, thus extending the coverage and performance of wireless devices using Bluetooth, Wi-Fi and ZigBee. Invicta is a Flexible Printed Circuit (FPC) antenna, which is easy to place in a design. It connects directly to the PCB via a cable and IPX MHF (UFL) connector...

Ten Years of Transistors

Ten Years of Transistors, May 1958 Radio-Electronics - RF CafeDid I ever tell the story about a manager I had at a major defense electronics firm who thought he could make an NPN transistor by wiring two diodes in series with the anodes tied together? He reasoned that since a bipolar junction transistor consisted of three alternating layers of n-type and p-type silicon, the device could be affected per his scheme. That was in the mid 1980s when I was still a technician (working diligently on my BSEE degree at night). Needless to say the engineers who worked under him were not too impressed with the guy's technical prowess (nor his managerial prowess, as I remember it). I didn't consider myself qualified at the time to judge him one way or the other, so the fact that he was a good guy made him OK in my book. This article from the year I was born reports on the advancements during the first decade of the transistor era. It was just before Christmas of 1948 that Mssrs. Brattain, Bardeen, and Shockley announced to the world their universe-changing invention...

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...

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 12th

Delay-Line Nomograms

Delay-Line Nomograms, November 1962 Electronics World - RF CafeDelay lines are used in electronic circuits for precisely adjusting the timing of signals. That can be to set times between events or to adjust two or more signals so that they arrive at some point in the circuit at a specific time with respect to each other. In a radar system, for instance, a sample of the reflected signal might be delayed in time by one pulse repetition period in order to compare it to the current reflected signal so that stationary (fixed, non-changing) signals can be cancelled out, leaving only the signal that has changed since the last sample. That is how MTI (moving target indication) functions. In today's world the samples are stored digitally and then compared digitally with other signals, but previously in fully analog systems, sending the sample along a longer (in time) path for comparison was necessary. Delay lines can be electrical like the ones covered in this 1962 issue of Electronics World magazine, or they can be mechanical such as with a quartz or mercury delay line...

Why 5G Operators Should Worry About PIM

Why 5G Operators Should Worry About PIM - RF CafePIM (passive intermodulation) is one of those RF and microwave world topics that is not often addresses, even though PIM issues can be a deal breaker for system performance or even obtaining operational certification in the first place. My own experience with PIM testing was back around year 2000 on high power BTS switching networks. There was very little in the way of commercial PIM test equipment at the time. At issue for me was PIM caused by coaxial cabling connections, but antennas suffer from it as well when power impinges on metal-to-metal interfaces. This Fierce Wireless article by Giuseppe Lipari, entitled "Why 5G Operators Should Worry About PIM," sheds some light on the subject...

Hobnobbing with Harbaugh - Just Plain QRM

Hobnobbing with Harbaugh - Just Plain QRM, January 1962 Popular Electronics - RF CafeHere is a little electronics hobbyist humor in the form of comics, compliments of Dave Harbaugh. These comics appeared in the January 1962 issue of Popular Electronics magazine. Dave liked to include amateur radio themes in his comics. For the non-Ham, QRM is the Q-code for "manmade interference." You don't need to be an amateur radio operator to appreciate those first two scenarios. The others are more generally related to electronics. A search of RF Cafe for "Harbaugh" will turn up many more of his works. As has been my practice of late, I colorized these comics...

ConductRF Ultra-Flex RF Cable Assemblies

ConductRF Ultra-Flex RF Cable Assemblies - RF CafeConductRF manufactures a broad range of cables using various LMR cable styles from Times microwave. This datasheet shows the options and part number construction for our series using LMR Ultra-Flex Cable. LMR-UF is a versatile cable that has low loss, good flexibility, and great RF performance. ConductRF has made several standards available via DigiKey in this series for customer convenience, Our standards include N-type connectors where male options off as standard a hex/knurl coupling nut to aid in torqued or finger tightening. SMA's are also available as standards and configuration include straight and right angle male as well as bulkhead options. DigiKey standard include cable sizes 240 and 400. LMR is the registered trademark of Times Microwave...

The Television Test Pattern

The Television Test Pattern, January 1949 Radio & Television News - RF CafeRemember the TV test patterns that used to be broadcast by over-the-air broadcast stations that were used to align the electron beam defection circuitry in CRT-based televisions? That pattern of squares, circles, parallel and radial lines was generated by a special tube called a "Monoscope" (RCA 2F21) on the transmitter end. Focus, 4:3 picture aspect ratio, linearity, frequency response, and contrast and brightness were all tweaked to optimize the pattern on the TV receiver circuitry. Of course not all sets were capable of obtaining a perfect alignment due to inferior design and/or a scheme by the manufacturer to provide a lower cost model with the tradeoff being a poorer picture - that was the type of TV we always had in my household as a kid...

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

/jobs.htm" target="_top"> 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 /jobs.htm" target="_top">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 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.

Tuesday the 11th

Time Constants... What They Do

Time Constants... What They Do, March 1956 Radio-Electronics - RF CafeH.P. Manly, author of this "Time Constants... What They Do" article from a 1956 issue of Radio-Electronics magazine, must have been a baseball fan. You'll know why I say that if you read the story. RC (resistor-capacitor) and to a lesser extent RL (resistor-inductor) time constants are one of the first topics covered in basic electronics courses, after Ohm's law. A thorough knowledge of them is essential both for design and troubleshooting purposes. Exploiting their properties for timing and waveform shaping is a major feature of circuit design and being able to recognize the effect a deficit or excess of capacitance (or inductance) in a circuit is often the most obvious clue to a malfunctioning circuit. In the days when electronics products (especially televisions with their complex composite waveforms) were repaired and aligned by technicians, comparing measured results with expected signals often instantly clued a guy into what had gone wrong.

What's All This Algebraic Equation Stuff, Anyhow?

What's All This Algebraic Equation Stuff, Anyhow? - RF CafeEvidently it is Bob Pease nostalgia time with the Electronic Design folks - and that's OK with me. I have not regularly read a particular person's monthly electronics industry magazine column since Bob left this Earth back in 2011. This is Part 1 of the classic 3-part series on algebraic equations from the long-running "Pease Porridge" articles entitled "What's All This Algebraic Equation Stuff, Anyhow?" Begins the master: "You guys may have noticed that recently, I have been showing you a lot of algebraic equations. I really don't like to use, or generate, algebraic equations. Sometimes they're much messier than just doing numerical evaluations. For example, to evaluate the response of a filter, I usually like to plug in the R and C values, and simplify as much as possible before I do the full analysis. I just prefer to get the numbers into number form as early as possible..."

Good Operating Pays Off

Good Operating Pays Off, April 1946 QST - RF CafeThe more things change, the more they stay the same. That saying applies to many recreational activities. Pick up a copy of the ARRL's QST magazine that was published in the last year and look at reader comments and you will find laments about the dwindling participation of youngsters, an increased degree of incivility and rule breaking during engagement, the high cost of getting into the hobby, yadda yadda yadda. I witness it regularly in the model aircraft world, too. That is not to say the issues are not true or irrelevant, just that they are persistent. Each generation, it has been said, tends to think of history beginning when he/she was born and all situations are new to his/her generation. Those of us who have lived through more than a single generation have seen the cycles repeat. They will continue to repeat. I am of the opinion that overall things improve by virtue of natural selection from a technical perspective. My proof is the undeniable advancement of the state of the art in both equipment and operators...

IPP-7124, 90° Coupler for 700–4200 MHz

Innovative Power Products IPP-7124, 90° Coupler for 700–4200 MHz, 150 W - RF CafeInnovative Power Products (IPP), with more than 30 years of experience designing & manufacturing RF & microwave passive components, is pleased to report that during the month of September, over 30 employees joined IPP's community service day at Long Island Cares, a food bank located in Hauppauge, NY. They sorted, weighed, and packed food, drinks, and cleaning/household products for distribution to needy people. Also, Innovative Power Products introduces our Model IPP-7124, a 150 watt, surface mount 90° coupler that operates from 700 to 4200 MHz. The IPP-7124 will combine two signals up to 150 watts CW of total output power. This coupler is produced in a Surface Mount (SMD) package with a size of 0.20 x 1.80 x 0.233 inches. The insertion loss is less than 0.65 dB, amplitude balance is less than ±0.85 dB, phase balance is less than ±5°...


Lasers, August 1965 Electronics World - RF CafeNot so very long ago the availability and usage of lasers was restricted to laboratory and military use, but today they are ubiquitous in our world. CD, DVD, and Blu-ray players are found in nearly every home and office. Laser pointers (including the green ones being illegally targeted on aircraft), laser distance measuring devices, laser leveling and alignment tools, laser light shows, laser cutting, even laser weapons can be found in many other venues, and at relatively low costs (except the weapons). Half a century ago, most lasers were fabricated from rare earth elements whose output powers were measured in a few milliwatts at most. The cost of even a low power laboratory experimental device was thousands of dollars. I can remember seeing something like a 0.5 mW helium-neon laser for hobbyists offered by Edmund Scientific back in the 1970s for about $200, and much more for a laboratory quality laser. Power supplies were hundreds of volts. Typical laser pointers put out around 5 to 10 mW and are made from tiny chips of semiconductors powered by pen cells or button cells. This Electronics World magazine article is a fairly extensive report...

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 Aegis Power Systems for Their 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.

Monday the 10th

Photofacts for Servicemen

Photofacts for Servicemen, August 1946 Radio-Craft - RF CafeI am embarrassed to admit that I was surprised when I saw this announcement in the August 1946 issue of Radio-Craft magazine for Sam's PhotoFacts entitled "A New Organization Attacks Circuit Information Problems." Maybe it is because they eventually generated data packs for electronics equipment prior to 1946, but I would have argued vehemently that Sam's was in business long before 1946. The Sams Technical Publishing website homepage states, "Since 1946 SAMS Technical Publishing manuals have been the standard that repair technicians have insisted upon having to provide professional repairs to their customers." I stand corrected...

Mac's Service Shop: Ignition Noise Problems

Mac's Service Shop: Ignition Noise Problems, August 1964 Electronics World - RF CafeAutomotive ignition noise issues are rarely experienced these days since not many people even listen to broadcast radio anymore, and those that do tend to prefer FM stations. Portable music devices rule the world both in and out of the car, with Bluetooth or phono jack connections to the dashboard stereo making it easy to bring your own entertainment and use just the amplifier portion of the box. Back before such conveniences existed, magneto, point, and condenser ignition systems wreaked havoc with radio reception. AM was particularly vulnerable because the noise was introduced inband and could not be readily filtered out. FM helped matters, but even then it was not uncommon to detect a background crackle in the audio that changed in frequency with the engine rotation speed; noise on the DC distribution systems was the culprit. Electronic ignition systems went a long way toward eradicating the problem. Nearly complete computerization of the entire vehicle control and signaling installation has created a whole new source of high frequency noise, but it usually is not noticeable to normal radio and digital data devices. Ham radio operators still have to contend...

Engineering & Science Disasters, Errors, & Mistakes

Engineering & Science Disasters, Errors, & Mistakes - RF CafeThere are plenty of trite old sayings about failure and how sometimes it is necessary to fail in order to ultimately succeed. After all, people will say, Thomas Edison tried a couple thousand different alloys for his electric incandescent light bulb (now ruled to be evil and a destroyer of fragile Mother Earth) before finally arriving at tungsten. If at first you don't succeed, try, try again. No pain, no gain. That sort of thing. Personally, I hate pain and have never felt like I had more character because of having suffered pain. First pass success is my preference on everything. If there is a parallel philosophy useful to illustrate how dumb it is to extol any virtues that failure might have, it is a quote from George Patton regarding the oft-touted nobility of dying for one's country: "Now I want you to remember that no bastard ever won a war by dying for his country. You won it by making the other poor dumb bastard die for his country..."

Crosley "'Fortyfive" Tabletop Radio Advertisement

Crosley "'Fortyfive" Tabletop Radio Advertisement, June 1932 Radio-Craft - RF CafeAccording to the Bureau of Labor Statistics' Inflation Calculator, this Crosley "Fortyfive" tabletop radio advertisement appearing in a 1932 issue of Radio-Craft magazine which was priced at $45 (which coincidently happened to be the name of the model) at the time would cost $932.01 in today's dollars. That's a lot of money for a radio, but after all it was a newfangled superheterodyne model containing seven vacuum tubes. The superhet feature made tuning a lot easier since baseband filters could remain fixed. Cheaper models were available at about half the price, but even that was a lot of dough to lay out for entertainment. Radios were considered a luxury item - like a third car is today. These "tombstone" style cases were popular in the day. I think they look more like an arched church window, but that's just me. BTW, note the mention of a "Federal tax" which may be levied on the purchase. Akin to a Value Added Tax (VAT) imposed in many countries, the U.S. does not currently have such a tax - much to the disappointment to many lawmakers in Washington who like to squeeze every ounce of blood...

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 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 9th

Electronics Theme Crossword Puzzle for October 9th

Electronics Theme Crossword Puzzle for October 9th, 2022 - RF CafeThis week's crossword puzzle for October 9th sports an electronics theme. 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!

Many Thanks to Amplifier Solutions Corporation (ASC) for Continuing Support!

Amplifier Solutions Corporation (ASC) - RF Cafe ASC designs and manufactures hybrid, surface mount flange, open carrier and connectorized amplifiers for low, medium and high power applications using gallium nitride (GaN), gallium arsenide (GaAs) and silicon (Si) transistor technologies. ASC's thick film designs operate in the frequency range of 300 kHz to 6 GHz. ASC offers thin film designs that operate up to 20 GHz.


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RF Electronics Shapes, Stencils for Office, Visio by RF Cafe
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