Joe Subich, W4TV wrote: > > Absolutely not! When conventional rigs are generating ALC > their final amplifiers are ALREADY in compression and they > are generating IMD in the PSK31 signal.
A bit sweeping, Joe. Surely any sane engineer would put the onset of system ALC at a level *before* the PA goes into compression? (Such systems would not include grid current derived ALC from some class AB2 PA of yesteryear.) To avoid the well-known problems of selecting suitable ALC time constants and loop gain, the K3 performs ALC at the DSP level: for any signal, SSB or PSK31, doesn't this demand a flat transmit passband in the system following the processing? Good thread! 73, Pete F5VNB/G4PLZ _______________________________________________ Elecraft mailing list Post to: [email protected] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
