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Old 23rd Mar 2020, 1:11 pm   #3
Radio Wrangler
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Join Date: Mar 2012
Location: Fife, Scotland, UK.
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Default Re: Tx with sweep valves

These are lower voltage/higher current devices than the usual RF power valves, so you'll need some different values in your Pi-network to load them up appropriately.

I believe Steve Webb of CobWebb antenna fame published a sweep toob linear of very light weight using a voltage-multiplier/rectifier mains transformerless PSU. safety isolation was by RF transformers. G3TXQ.

There is also the 'Frinear' with 4x PL519 by PA0FRI

Might be worth looking at, but I'd use a mains transformer.

David
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