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BITX PA


 

Folks
I am working from the (c)2004 circuit on Ashar's web page and have very low
output from PA. I am using cheap general purpose transistors (ME4003) and
changed pre-driver for 2N2222. Better but still only about 1W out.
I have used a very similar PA in the TCF transceiver by VK3XU and it works
fine. That is on 40m though.
I have read through previous postings and applied mods by Chris, PA3CRX.
I now have full 6W output. Well done Chris!
I see Ashar has adopted the trifilar transformer and the extra 200pF capacitor
in his simple dual band transceiver design. Is there a definitive revision,
or is it a case of 'suck it and see'?
73, Steve, G0FUW


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