On Feb 16, 2017 5:55 PM, "John Backo via Groups.Io" <iam74=[email protected]> wrote:
Good idea, Marco.
Yeah, the 2SC1969, 2SC7025 and many others will work well. But these are BJT's which
are very different animals than MOSFETS,
There a multitude of examples available for a dual output AB amplifier out there.
You must build it on a separate board and feed it via R136. You will probably have
to use a phase splitter and dual drivers. You will probably have to control driver
bias voltage with diodes sensing finals temperature.
Start with Harry's website. He has an extremely good introduction to this type
of amplifier.
Understand that this is another realm to conquer. It may make your BITX
easier to use but it will require entering new places with new RF territory.
There is an alternative which starts with the WA2EBY amplifier. That's the font
for practically all variants of the MOSFET amplifiers now out there, including
the BITX40.
