[Boatanchors] Gonset,GSB-201 (3340) Amplifier

[Olaf Madsen]

Hello Friends,

I am res-errecting this old 1960 Boatanchor ( Gonset GSB-201)---this is the 
oldest version (3340) built Gonset using 4(four) 811-A's not the later 
versions using 572-B's that were manufactured by Aerotron after they aquired 
Gonset.

The amp uses ''grounded grid'' without any ''tuned input''circuitry --The RF 
is fed straight into the filaments from the exiter.

I have made the various mods for the antenna switching to be used with 
to-days transceivers and everything is working fine---Getting full output 
700-900 Watts on 40.20,15  and even on10 mtrs the amp puts out 700 Watts

On 80 mtrs,however,I only get 450 to 500 Watts out,even though I have the 
same 100 Watts  drive available from the Tranceiver.---There are 3 positions 
to add fixed capactors to the Loading  cap,but I cannot sqeeze any more than 
500 Watts out of it.---the plate current is also pretty high and the tubes 
are getting red in a hurry.(theTuning capacitor produces a normal dip.)

Looking thru all the info on the internet,I have not come up with anything.

Can someone help me along to understand what causes the problem.---TNX in 
advance.es 73 de Olaf,KF4TP---.