> Most amplifiers have very crummy ALC detection. All they do > is same RF level at the cathode of the tube, and that > doesn't indicate excessive drive or nonlinearity at all!
The only ALC systems I've ever taken seriously are those that are designed together between the transmitter and external amplifier as a system so that the ALC "meet me point" is optimized. But even among one common manufacturer, that still does not guarantee good ALC performance. Today, a commercial amplifier should be designed to be smart enough to know when it's going into a fault condition from the exciter without requiring an ALC "feedback" cable -- and some newer amps finally have this capability in their feed-forward designs. Paul, W9AC ______________________________________________________________ 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
