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Re: [IRCA] [NRC-AM] 600 Hz het at 1340 kHz
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 <bdm@xxxxxxxxxx> wrote:
> From: Barry McLarnon <bdm@xxxxxxxxxx>
> Subject: Re: [NRC-AM] 600 Hz het at 1340 kHz
> To: am@xxxxxxxxxxx
> Cc: irca@xxxxxxxxxxxxxxxx
> Date: Thursday, March 26, 2009, 8:50 PM
> On Friday 20 March 2009 19:08, BACONTI@xxxxxxx 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
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