[amsat-bb] Carrier on 145.8 NORCAL
n0jy at amsat.org
Fri Apr 15 05:48:23 UTC 2016
This thread prompted me to take a look at some interference I had on
145.800. It turned out to be 145 810 or so, after I tracked it down.
And it was coming from an IP camera I have in the attic that I used to
watch my satellite antennas. The wireless was off, it was on a cable,
but it still put out all sorts of garbage on 2 meters. Just a thought,
maybe the problem is closer to home than you think!
Jerry Buxton, NØJY
On 4/13/2016 20:59, Patrick STODDARD (WD9EWK/VA7EWK) wrote:
> If the cable TV system in your area still uses analog channels, the
> 2m band falls around cable channel 18 (144-150 MHz). That used to
> be a problem for me in the past, if there was degraded coax cable
> connecting houses to the cable TV system in the neighborhood. If
> I transmitted on much of 2m, I would interfere with that cable channel.
> And I could hear the audio carrier from that channel on my 2m radios.
> If this is the case, you might hear the audio from that analog cable
> channel on 149.750 MHz.
> Thankfully, my current neighborhood doesn't suffer from having some
> old or compromised cable in the ground between the houses and street
> (all cable TV and telephone infrastructure is underground around here).
> And no TVI complaints from the neighbors, when on HF or VHF/UHF. :-)
> Patrick WD9EWK/VA7EWK
> Twitter: @WD9EWK
> On Thu, Apr 14, 2016 at 1:39 AM, Paul Stoetzer <n8hm at arrl.net> wrote:
>> There's a lot of junk on 145.800 MHz here in DC. My router or cable modem
>> seems to put out a strong carrier there. Other signals appear there around
>> my apartment building too (there are certain interference free areas I can
>> go). The church across the street also appears to have some wireless mic
>> system there.
>> Trying to listen to the ISS or work XW-2C is always interesting with all
>> these signals near that frequency.
>> Paul, N8HM
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