[AMRadio] New monthly AM operating event

[W. Harris]

I agree, that is too close to the band edge for AM operation. I once head a couple of operators operating lower SSB right on 7.3. When I tried to explain that they were operating out of the band, they claimed they could not be because they were on lower SSB so their signal was all below 7.3. Tried to explain to them, but being products of the current testing system in which ones can know very little and still get a license, they educated me that I didn't know what I was talking about.  Sigh.

Bill - K5MIL

________________________________
From: amradio-bounces at mailman.qth.net <amradio-bounces at mailman.qth.net> on behalf of Donald Chester <k4kyv at charter.net>
Sent: Saturday, October 27, 2018 7:07 PM
To: amradio at mailman.qth.net
Subject: [AMRadio] New monthly AM operating event

> Since
> the military used both AM and USB for voice modes, both modes have
> always been welcome on our 40 meter net which meets at 9AM Central time
> on 7296 kHz.

Be careful. Operating that close to the band edge on AM or USB opens the
possibility of an FCC citation for transmitting outside the amateur band.  A
phone signal must be especially clean to not have any audible sideband
products beyond 4 kc/s away from the carrier frequency.  I don't often
operate AM on the popular 7295 frequency for this reason, and when I do, I
carefully check my frequency, switch in the narrow audio LPF and closely
watch modulation percentage on the scope.

The FCC may have cut back on their monitoring activities in recent years and
probably don't pay as much attention to what goes on in the HF spectrum as
they used to; they once would cite an amateur for any detectable emissions
outside the band, even when suppression of spurious sideband products
conformed with "good engineering practice".

Don k4kyv



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