RadioBanter - View Single Post

July 20th 03, 06:00 AM

wrote:

I have a couple of Astro Little Devil 11 meter amps that came out of
an estate.

Wondering of anyone ever succesfully converted one of these to 6
meters?

I'm using a Ten Tec 6 meter Transverter on my Kenwood TS-450S and
could use a little more "UMPH".

I could use a schematic showing which trim caps are input and which
are output if anyone might have one.

Terry

WB0VQP

It's a non-starter, Terry. It could be done, but it is not
likely worth the effort and $. It is likely that the output
transistor(s) in the Astro won't play well at 50 mHz, and
the stray capacitance and inductance that posed no problem
at 27 mHz may drive you to distraction at 50.

Essentially, you'll need to change the input and output
tuned circuits. You won't be able to use the components
that are there now in those circuits, and you'll probably
need to change the transistor(s). And if you need to
change the transistors, you may well need to change the
"support" components that establish bias and stage
input levels.