[Amps] GU43B amp for 2m ?

[Steve Thompson]

G0RUZ Conrad wrote:
> Yes its a copy of the 4CX1000A amplifier that was published in the
> ARRL handbook. I have built this amp and used a 4CX1500B in it, the
> key is to ground the screen. One other caveat is that there is a
> strange mode set up in the anode compartment. I cured it by placing a
> big (100w) 120 ohm carbon resistor stood off the chassis two
> insulators. I had seen this in some Band II cavity amplifiers and it
> completely cured it, I was astonished at the time.
Do tell more, please.

Steve