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WA2IAC Electronic TR Switch Project

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W3LYP TR Switch

Electronic TR Switches have been around for a while. They allow for full break-in CW by eliminating the need for a TR relay, which is unlikely to do 20+ WPM when running a kilowatt. Tubes are heavy duty, and unlikely to be affected by power so they're perfect for this application. Here is one design using a 6BZ7 that was an inspiration to my homebrew efforts.

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