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About RF Cafe
Copyright: 1996 - 2024 Web 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 typing up your telephone line, and a nice lady's voice announced "You've Got
Mail" when a new message arrived... All trademarks, copyrights, patents, and other rights of ownership to images
and text used on the RF Cafe website are hereby acknowl My Hobby Website: |
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Solitron Devices Fetrode Advertisement
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By the early 1970s, many types of vacuum tubes had already been replaced by solid state devices. A lot of the resistance by hardline lovers of glowing tubes was beginning to accept the reality of superior electrical characteristics of many types of germanium and silicon diodes and transistors over tube equivalents. During my enlistment in the USAF from 1978-1982, the vacuum tube diode used to trigger the pulse forming network for the airport surveillance radar (ASR) circuit was replaced with a plug-in solid state replacement. It seemed to work just as well. I don't recall ever having to replace the faulty vacuum tube version, so I cannot attest to whether the solid state version was an improvement. Part of the motivation for replacing tubes with solid state devices was obsolescence of the tubes, so maybe that is why it was done. The "fetrode" introduced here by Solitron Devices was designed to be a plug-in replacement for the 6AK5 vacuum tube, which is a pentode amplifier. Although not specifically stated, I assume the name "fetrode" implies it was a field effect transistor (FET). Solitron Devices Fetrode Advertisement
• Greater longevity • No warm up • No filaments to burn out • No rewiring (direct replacement) • Internally R. F. shielded • Low dissipation: 1.3 watts (nominal) • Plus 500 MHz operation • Absolute low noise/distortion This is a 6AK5 FETRODE a solid state device that replaces a vacuum tube for: Stereo Tuner • Amplifiers/OSC • Citizen Band Receivers/Transmitters • Radio/TV • Many More ... Special Offer During this introduction, you can purchase one (1) from us direct: Remit $5.00 plus 5% California state sales tax (Residents only), or if further information is required, please fill out the following coupon.
Posted December 1, 2017 |
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