I know of at least one AM'er I saw online that ised his K2 as a (n expensive) VFO for this tube transmitter.
You won't find AM'ers always "on frequency", as most old vfo's are only accurate to 5kHz (1kHz with Collins). I have thought of playing with AM (tx and rx) with a K1 or K2 when I get one. But I would doubt Elecraft themselves would bother with such endeavors, especially on a rig that is designed to be such a fine CW rig. The issues I think I would encounter are: rx: 1) detection: cut the BFO and perhaps insert a diode detector 2) bandwidth: would have to open up to at least 4kHz tx: 1) modulation: you could just drop a book on the key in CW mode and then you need to modulate with voice, one way might be via series PDM modulation David, K3TUE . --- Don Wilhelm <[EMAIL PROTECTED]> wrote: > Sean, > > While AM transmit with the K2 would be a MAJOR change, it may be possible to > achieve AM receive - I haven't tried it, but D1 on the control board in the > AGC section looks a lot like a diode detector that might just be used for AM > demodulation. You may want to try connecting an Audio Amplifier to the > cathode of D1 and see what happens - the value of C2 may be a bit on the > large size for proper operation, so a bit of experimentation may be in > order. > > I think I can assure you that AM transmission is not in the Elecraft product > plan - that is for the boat-anchor folks. You were likely hearing some > old-time transmitters and some do have a difficult time getting on frequency > (by today's standards) and many will drift more than is considered 'state of > the art' today. These WERE state of the art transmitters back in the days > they were in common use, but what was acceptable then is no longer OK on the > ham bands (except in specialized areas). > > 73, > Don W3FPR > > > > -----Original Message----- > > > > just wondered if am would be possible with the k2 eventually .and > > if it was how would one go about doing this. have heard a couple > > am'ers on 80 a couple of times and it seemed awfully hard to copy > > a qso ,not everyone was on perfect frequency . just a thought > > > > _______________________________________________ > 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 > _______________________________________________ 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
