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 > ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
