Thanks Allan, I have managed now to get to an output of about 0 dBm from the driver stage. I have not got the power module in as I doubt it will work on 70MHz. I will replace it with one that does. The 0 dBm is a little disappointing but I know why and am working on fixing that.
The harmonic trap you mention is actually a low pass filter. I have modified it for 42MHz. I have also modified the low pass filter at the output. The band pass filter is currently half modified, the same coils but different Capacitors. When I completely finish the modification, I will post a link to a web page with the full details. If it is ppossible to maintain performance with the original coils, it is a much better option than buying 10,000 to replace 3 of them. I am interested in your component values, especially for the LNA Mike Allan Duncan-3 wrote: > > > > Hi > > I converted an XV50 to 70MHz at the end of 2006 and have used it (with my > K2) on SSB and CW during a few of the RSGB 70MHz contests in 2007. I have > been very pleased with the performance of that combination - particularly > on > CW. > > I have access to a modern spectrum analyser - both the two tone TX IMD and > spurious performance were similar to an unmodified XV50. > > I purchased replacement L's and C's from Mouser in the USA. The L's are > made > by a company called Xicon and are identical to those originally fitted. I > suspect that Mouser supply Elecraft themselves with the L's in their > transverter designs. > > Unfortunately, since I purchased mine, the minimum order quantity for > these > has been increased from 1 to 10,000 from Mouser (www.mouser.com) and I > have > been unable to find another supplier anywhere. > > The XV50 2nd harmonic trap (C58, C59 and L3) will need to be removed for > 70MHz. > > If I get a chance this evening, I will post my component values I used to > modify my XV50 to 70MHz. > > 73 > > Allan > GM4ZUK > > > > > _______________________________________________ > 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 > > -- View this message in context: http://www.nabble.com/XV50-on-70MHz-tp14067091p14700581.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
