Simon Brown (HB9DRV) wrote: > > Julian suggests running a bar of ALC - I very strongly disagree. Never, > ever > run any ALC with PSK as it degrades the quality of the signal and makes > decoding more difficult. > > With digital modes *always* aim for a 100% linear signal. It's not the > power > but the quality / purity that matters. What may look good on the other > station's waterfall is not always the best for decoding. > > It's not just what you transmit but what you don't transmit that matters. > Simon, what you say may be true of most radios but WRONG about the K2. This Elecraft document http://www.elecraft.com/Apps/PSK31_KSB2_mods.htm describes a modification that was made to early K2s that was since I believe incorporated in production. It changes the way the ALC works in data modes. It specifically recommends setting the level to one bar of ALC. I have always operated my K2 like that and when I have monitored my signal on another radio the IMD is typically -32dB.
----- Julian, G4ILO K3 s/n: 222 K2 s/n: 392 G4ILO's Shack: www.g4ilo.com Zerobeat Ham Forums: www.zerobeat.net/smf -- View this message in context: http://www.nabble.com/K3-and-linear-amp-tp16180386p16196738.html Sent from the Elecraft mailing list archive at Nabble.com. _______________________________________________ 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
