[Boatanchors] Amps for QRP rigs

[Mike WE0H]

I picked up a freebie chicken bander transistor amp last summer. Brought 
it home, cleaned it up and it tested 100w out on 10 meters and 125w out 
on 160 meters, with 5-10w drive. Needs band lowpass filters, of course, 
but it was a freebie and works.
There are plenty of kits available online for those Motorola SS 
transistor amps. One company even allows you the choice of the 
transformer core material to suit the bands of interest. They even work 
on 600 meters (505-510kc)...

Mike
WE0H


jeremy-ca wrote:
> Some of the tube CB amps can easily be rebuilt into decent 160-10M ham 
> amps. They are typically 1 or 2 sweep tubes in GG driving 3-4 more. 
> With a little TLC they will give a clean 200-500W out.
>
> The SS amps can be rebuilt with new broadband transformers (right out 
> of the Motorola manuals) to work 80-10 but they will be dirty unless 
> you add band filters to the output.
>
> The biggest problem is the availability of sweep tubes but there is no 
> reason to ignore the less popular varieties even if it means a new 
> filament xfmr.
>
> Carl
> KM1H