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Lotus Communication Systems Modular RF Component Building Blocks - RF Cafe

Homepage Archive - December 2022 (page 2)

See Page  1 | 2 | 3 | 4 of the December 2022 homepage archives.
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Friday the 9th

Thursday the 8th

Quantum Teleportation Opens "Wormhole in Space-Time"

Quantum Teleportation Opens a "Wormhole in Space-Time" - RF Cafe"The equivalent to a wormhole in space-time has been created on a quantum processor. Researchers in the U.S. used an advanced quantum teleportation protocol to open the wormhole and send quantum signals through it. By studying the dynamics of the transmitted quantum information, the team gained insights into gravitational dynamics. The experiment could be further developed to explore quantum gravity or string theory. A wormhole is a bridge in space-time that connects two different locations. While wormholes are consistent with Albert Einstein’s general theory of relativity, they have not been observed by physicists. Unlike wormholes in science fiction, they are not traversable – meaning things cannot pass through them. Although general relativity forbids travelling through a wormhole, it is theorized that exotic matter..."

Lafayette Chassis Model B−100 Radio Service Data Sheet

Lafayette Chassis Model B-100 (Table Model B-103; Console Models B-101, B-102) Radio Service Data Sheet, August 1941 Radio-Craft - RF CafeThe Radio Service Data Sheets that were published in Radio−Craft magazine usually seem to have more information included than those published in other magazines, at least in the same era (1940-ish). It might have to do with how much material is provided by the manufacturer rather than a decision by the magazine editors. Either way, here are the schematics, chassis layout, and service info for the Lafayette Model B−100 through B−103. As with most radios built in the era, the woodwork and artistic design of the cabinet are exquisite. There are still people searching for such data, but fortunately the Internet is making it much easier to locate. None of the three models show up on eBay as of this writing...

Anatech Intros 3 Filters for December 2022

Anatech Electronics Intros 3 Filter Models for December 2022 - 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 filter models have been introduced - a 650 MHz LC lowpass filter with a maximum passband 1 dB insertion loss (SMA connectors), a 30 MHz LC lowpass filter with a minimum passband return loss of 15 dB (N connectors), and a 3800 MHz lowpass filter with a maximum insertion loss of 1 dB (SMA connectors). 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...

Portable Satellite Communications Link

Portable Satellite Communications Link, February 1967 Electronics World - RF CafeHere you are - portable satellite communications in the mid 1960s per this photo from Electronics World magazine. It has a unique "cloverleaf" ganged parabolic antenna array with phasing control. Today, we have "manpack" type systems which use compact antennas that can be quickly assembled and disassembled in any environment, along with receivers that have sensitivities much greater than the type shown here. As the name implies, they are transportable in backpack form. Software-defined radio (SDR) technology facilitates programmable modulation and frequency band operation. The Mark V AN/TSC-54 Satellite Communications Link Terminal featured here operated at 8/7.5 GHz up/down. An information page for the Mark V AN/TSC-54 can be found on the GlobalSecurity.org website, which includes in part, "It is completely transportable in two C-130 cargo aircraft." I guess the definition of "portable" has changed a bit since then...

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

Empower RF Systems - RF CafeEmpower RF Systems is the technological leader in RF & microwave power amplifier solutions for EW, Radar, Satcom, Threat Simulation, Communications, and Product Testing. Our air and liquid cooled amplifiers incorporate the latest semiconductor and power combining technologies and with a patented architecture we build the most sophisticated and flexible COTS system amplifiers in the world. Solutions range from tens of watts to hundreds of kilowatts and includes basic PA modules to scalable rack systems.

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

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

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Linear Integrated Circuits

Linear Integrated Circuits, November 1965 Electronics World - RF CafeHere is a sample of what passed as big news in the electronics world in 1965 as reported in none other than Electronics World magazine. Linear integrated circuits were beginning to be designed into commercial products and a lot of effort and money was invested in promoting the newfangled technology to the public. Prices were rapidly falling as acceptance increased. The truth is the vast majority of the general public had no idea what the difference was between vacuum tube and semiconductor equipped radios, televisions, phonographs, tape recorders, etc., from a performance standpoint. What they did notice was the smaller size, lack of warm-up time, and lower power consumption (i.e., less heat). Prices were about the same at the beginning of the technology transition. Some anti-semiconductor naysayers tried to argue that at least with tube equipment you had a chance of fixing a malfunctioning unit simply by replacing a $1 tube, but failed to note that the equivalent semiconductor product almost never experienced a failure. Of course there were some crappy transistorized products, but that was the exception rather than the rule.

 

 

E. F. Johnson Christmas Ad

   E. F. Johnson Christmas Ad  

 

 

 

 

 

 

 

 

 

 

 

 

 

 Loring Air Force Base, Maine - RF Cafe Loring AFB (/pictures folder)°

Building implosion 

Magnetic Variation

 

 

Engineering Job Opening

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.

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...

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...

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!

RF & Electronics Symbols for Visio

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

Get Your Custom-Designed RF Cafe Gear!

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

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

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

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TeraByte InfraRed Delivery Fastest Laser Link from Space

TeraByte InfraRed Delivery (TBIRD) Fastest Laser Link from Space - RF Cafe"In May 2022, the TeraByte InfraRed Delivery (TBIRD) payload onboard a small CubeSat satellite was launched into orbit 300 miles above Earth's surface. Since then, TBIRD has delivered terabytes of data at record-breaking rates of up to 100 gigabits per second - 100 times faster than the fastest internet speeds in most cities - via an optical communication link to a ground-based receiver in California. This data rate is more than 1,000 times higher than that of the radio-frequency links traditionally used for satellite communication and the highest ever achieved by a laser link from space to ground. And these record-setting speeds were all made possible by a communications payload roughly the size of a tissue box. MIT Lincoln Laboratory conceptualized the TBIRD mission in 2014 as a means of providing unprecedented capability to science missions at low cost. Science instruments in space today routinely generate more data than can be returned to Earth over typical space-to-ground communications links..."

 

 

 

 

 

 

 

 

 

 

 

 

 

 

These archive pages are provided in order to make it easier for you to find items that you remember seeing on the RF Cafe homepage. Of course probably the easiest way to find anything on the website is to use the "Search RF Cafe" box at the top of every page. About RF Cafe.

Homepage Archive Pages

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2012:  1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 (no archives before 2012)

Windfreak Technologies SynthHD PRO - RF Cafe
Innovative Power Products Passive RF Products - RF Cafe
Innovative Power Products Passive RF Products - RF Cafe
RF Electronics Shapes, Stencils for Office, Visio by RF Cafe
RF Electronics Shapes, Stencils for Office, Visio by RF Cafe

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About RF Cafe

Kirt Blattenberger - RF Cafe Webmaster

Copyright: 1996 - 2024

Webmaster:

    Kirt Blattenberger,

    BSEE - KB3UON

RF Cafe began life in 1996 as "RF Tools" in an AOL screen name web space totaling 2 MB. Its primary purpose was to provide me with ready access to commonly needed formulas and reference material while performing my work as an RF system and circuit design engineer. The World Wide Web (Internet) was largely an unknown entity at the time and bandwidth was a scarce commodity. Dial-up modems blazed along at 14.4 kbps while 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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