I noted the 1400 het @ 600 Hz earlier in the week but haven't since. I haven't gone back and checked 1340 this week. I also don't have a way to check if they're symmetrical.
Russ --- On Thu, 3/26/09, Barry McLarnon <[email protected]> wrote: > From: Barry McLarnon <[email protected]> > Subject: Re: [NRC-AM] 600 Hz het at 1340 kHz > To: [email protected] > Cc: [email protected] > Date: Thursday, March 26, 2009, 8:50 PM > On Friday 20 March 2009 19:08, [email protected] wrote: > > I got a chance to evaluate the het at 1340 kHz before > sunset. It's > > actually a double signal, at 1339.4 and 1340.6 kHz, > strongest with > > phasing aimed east which would indicate one of the > 1340 Maine > > stations as the source. It appears on the SDR IQ > spectrum analyzer > > as two distinct signals of equal strength at + and - > 600 Hz > > centered on 1340 kHz as if it were an amplitude > modulated 600 Hz > > tone. > > The 600 Hz tone is still audible here tonight on 1340, but > here's a > new twist - there's also one on 1400! Similar strength > (not strong, > just noticeable in the mix), and the tone frequency is > virtually > identical. In both cases, they appear to be symmetrical > sidebands, > not isolated hets. They don't seem to be coming from > the same > location, though - nulling with a loop to get some idea of > direction, > the 1340 tone seemed to be to the east (or west) of me, > while the > 1400 tone is more to the south. > > Anybody else hearing these signals? > > Barry > > -- > Barry McLarnon VE3JF Ottawa, ON > _______________________________________________ > The NRC AM mailing list > nrcdxas.org > Questions? [email protected] > Now taking orders for the 29th AM Radio Log _______________________________________________ IRCA mailing list [email protected] http://montreal.kotalampi.com/mailman/listinfo/irca Opinions expressed in messages on this mailing list are those of the original contributors and do not necessarily reflect the opinion of the IRCA, its editors, publishing staff, or officers For more information: http://www.ircaonline.org To Post a message: [email protected]
