Actually 4 MHz is probably the most common I.F. for LF/MF converters. Many Ham band rigs receive in the 4.0 to 4.5 MHz range and it uses a commonly-available and cheap 4.0 MHz crystal for the L.O. The other designs I've seen mostly use that range.
I bread boarded a diode ring mixer converter for the 400-500 kHz range, but haven't converted it into a finished unit yet so I haven't investigated what the K3 (or the K2) will with it in the transverter menus. Ron AC7AC -----Original Message----- Scott, Right now, the K3 XVx RF can be set to most any frequency (MHz increment) from 0 to 999 - but unfortunately the IF frequency is currently limited to 7, 14, 21, 28, and 50 MHz. If we could convince Wayne and Eric to support the 10 MHz band as an IF, that would work for the 10 MHz IF used in the Jackson Harbor Press kit that has received some recent 'press' here. I suppose a 4 MHz If might be possible too - but that may depend on how many users there may be. What is the chance that you could change the mixer crystal to give your VLF converter a 7 MHz IF? If it has tuned circuits at the output, those would have to be changed to the new IF as well, but it certainly should not be a daunting task, perhaps just a few toroids to wind. I don't know how well any of this works because I have not tried it, but it seems feasible looking at the K3 transverter interface menus. 73, Don W3FPR _______________________________________________ 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
