Dan,
I would suggest you talk to Stan, K5GO. I
think he is using Drake L-4B's with homebrew
power supplies. Myself I have a couple of
Drake L-7's here which can be found pretty
cheap on Ebay, but they won't quite do 1500W
with the stock power supply (1200-1300W). You
might consider a hybrid approach along the
lines of what Pete, N4ZR suggested. Drake
L-4B's and an L-7 (for 160 meters) in concert
with a big homebrew supply ala W3LPL. The
Drake's are already setup for external
supplies, so you wouldn't need to modify the
RF decks at all (the L-7 and the L-4B use the
same external supply). You could keep the
light duty external supplies as backup's or
sell them on Ebay to fund the homebrew supply.
BTW, it may be possible to raise the anode
voltage on the Drake's up from 2500V to
increase the output capability, but this may
entail chaning from zero-bias to some kind of
zener regulator. There may also be issues
related to the ratings of the tank components.
Check with Stan, K5GO as I think he raised
the anode voltage on the L-4B significantly
and has had good results.
If you can afford the Alpha 76PA's that
is also a good choice.
73 de Mike, W4EF...........................
----- Original Message -----
From: "Phil Clements" <philk5pc@tyler.net>
To: "Dan Levin" <djl@andlev.com>; <amps@contesting.com>
Sent: Friday, February 14, 2003 4:52 AM
Subject: Re: [Amps] Cheap 1500 Watt Amps?
> > What would your suggestion be for a low cost, reasonably reliable amp
that
> > will do 1500 watts out in contest use?
>
> We have all been waiting for this gem for years!
> There is no such thing as a free lunch, Dan.
> There is no such thing as cheap, reliable, and 1500 watts out, key down.
> Truly an oxymoron, IMO.
>
> (((73)))
> Phil, K5PC
>
>
>
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