Ken, It is the VCO - not the bandpass filters. The VCO will stop changing frequency when the voltage at the left end of R30 goes much above 7.7 volts and becomes unstable below 1 volt.
It would appear that you need to re-investigate the entire VCO range adjustment and adjust L30 to get everything within range on all bands. See the VCO alignment section of the manual (page 61 in the Rev F manual). If you cannot get 160 meters within range C75 may be at the lower edge of its tolerance, a small padder capacitor can often be added across C75 to bring things in line. 73, Don W3FPR > -----Original Message----- > > My VFO range on 160m is 1330-1941. The rig stops tuning > outside this range. I didn't notice it until tonight because I rarely > tune outside of 1800-1900. > > At first I suspected the 80/160m bandpass inductors which I > never readjusted after I installed the 160m module. I didn't do > that because I was getting full power into a dummy load across > both bands with L3/L4 peaked for 80m only. > > Might this be another clue? My VFO won't tune above 4.104, > either. All the other bands seem fine. > > I just tweaked L3/L4 for a good compromise of power on *both* > bands but I still can't get the VFO to cover all of 160m. > > -- No virus found in this outgoing message. Checked by AVG Anti-Virus. Version: 7.0.323 / Virus Database: 267.9.2/52 - Release Date: 7/19/2005 _______________________________________________ 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
