> Do people blast the inputs of their SS amps with 200w or 400w? You bet > they > do. They fry the FETs immediately too.
And that can occur whether or not an ALC line is used between the transceiver and amp since ALC is a feedback function and the response time back to the transceiver, and the response time of the transceiver, is not instantaneous. > We see them on a fairly frequent > basis and we have gotten adept at swapping out FETs quickly - at > significant > expense to the owner of the amp. In the vast majority of cases, they had > ALC > disconnected and made a mistake when switching antenna outputs from these > high-power transceivers. When repairing the THP amps for failed MOSFETs, how do you know with certainty the ALC line was disconnected by the customer? Also, what is the typical ALC response time of the THP amplifiers? I think it would be an interesting exercise to set up multiple transceivers across vendors, together with multiple solid-state amps across vendors, and measure the total ALC loop time period. Paul, W9AC ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
