On Saturday 05 May 2007 22:24:11 Joseph Trombino Jr wrote: > Correct Ian....I didn't count the last two xtals since I believe these two > xtals are used more for removing I.F. noise than for providing > selectivity....at least this is what has been mentioned in other receiver > articles I have read.
Joe, The bandwidth of the two is affected by the same filter bandwidth controlling voltage, V XFIL2, on an MV209 diode. I wonder how it varies with the bandwidth of the five using 1SV149 diodes. I see also that there is a mysterious (to me, I don't see where it goes) IF out via C181 that is indeed after only the first five crystals. 73 Ian, G4ICV, AB2GR, K2 #4962 -- _______________________________________________ Elecraft mailing list Post to: Elecraft@mailman.qth.net 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
