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Re: Vacuum-tube final for QRP transmitters?


 

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I originally got the idea from an SWL (later GM8BAR) with whom I went on DXxpedition as GC3PAI/A and ON5YB in the 1960s. He had built a receiver which could best be described as the transistor equivalent of the G2DAF.?

It performed very well but he was not entirely satisfied with the performance and was talking of replacing the front end with something based on Nuvistors, but ended up emigrating to Australia. He did not get as far as looking at low power PAs.

73 John F5VLF

On 13 Sep 2023, at 22:33, ian007 via <ian007@...> wrote:

The plate voltage would still need to be like 90V-200V. Don't let the allure of $5 tube fool you, unless you already have a fairly expensive high-voltage power supply lying around looking for use.?

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