[Elecraft] Interpretation of P3 display

[David Gilbert]

Sorry ...

Amplifiers with a pair of GU-74Bs typically want to be driven at less 
than 50 watts for full legal power, and from what I understand (I'm not 
an expert) their screen grids can be damaged with excess drive levels.  
Those amplifiers almost always have pretty sophisticated drive limiting 
and protection circuitry, but repetitive spikes of overdrive (like from 
an ALC controlled transceiver) could still be harmful to them ... at 
least as I understand things.  Maybe somebody who truly knows can 
clarify here.

In any case, those spikes of power above 50 watts (like from my old 
756Pro) certainly could push the amplifier into flat topping and create 
pulses of splatter.

73,
Dave   AB7E



On 6/9/2012 12:41 PM, Roy Morris wrote:
> David, what are you saying?  Do the GU74bs dislike or do they tolerate the
> spike?  You left out an important word in your previous statement.  Thanks,
> Roy  W4WFB
>