Thanks to advice from M0DHO, LA3ZA and Gary Surrency at Elecraft the problem described in
http://www.ac6rm.net/mailarchive/html/elecraft-list/2005-12/msg00408.html is now solved, or nearly so. I still see a big jump in SSB power between 10 and 11 watt settings, but the power output is always under control (no power supply buzzing and RF metering does not read 100 W peaks when set for 11 W, for example). No obvious signs of splatter or distortion any more. I put a 1k resistor in series with the base of Q1 in the KSB2 and put 3.3k in parallel with R9. It's pretty fiddly work on this compact board, but doable. This is in the middle of the range for R9 suggested by Gary Surrency. Probably I should go for the low end of the suggested range (even more aggressive ALC). 73, Steve VE3SMA __________________________________________________________ Find your next car at http://autos.yahoo.ca _______________________________________________ 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
