> From: Bob Eldridge <eldridge@direct.ca>
> Subject: Re: Topband: What are these weak birdies every 10.0000 KHz?
> To: "Mike Waters W0BTU" <mrscience65704@yahoo.com>
> Date: Sunday, February 21, 2010, 12:28 PM
> Hi Mike
> Further to
> Tree's explanation, it is
> sometimes just one powerful BC signal that causes the mix
> with other weaker
> ones. If you connect a series trap across your
> antenna input with
> capacitor and coil to resonate in the BC band, and slowly
> tour across the BC
> band, you may find one setting at which the mixes (or
> some of them)
> disappear. When I lived in Vancouver I did this, and
> identified the
> station using a germanium diode and a headset.
>
> Where I live now
> there is no powerful BC
> station within 150 km. I hear a few BC beat carriers
> (maybe second
> harmonics) on 160, but they are not strong enough to
> bother about, and
> sometimes I can spot unusual conditions by the nature of
> the sound of the one on
> 1830 ("auroral" sound, deep QSB, or
> whatever).
>
[snip]
Thanks for the info, Bob. I don't have any strong BCB stations nearby, but
maybe I'll try your suggestion, thanks.
73,
Mike Waters
W0BTU
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