[amsat-bb] Repeater interference on AO-92
Eric Williams
kv1j at comcast.net
Wed Apr 29 03:17:23 UTC 2020
I ran the experiments for 2 passes. 28Apr 1608 UTC and 29Apr 0245 UTC. The
first pass was just a few minutes before it switched to the video mode. The
second pass was high elevation and 11 minutes.
It was mentioned that the interference might be from a 145.110 MHz repeater
due to the 3rd harmonic. Also mentioned were towns heard in the
conversation and that there was a courtesy beep. A repeater in our area
that fits all those items in the N1CON repeater in Concord MA.
For both passes I heard the bird fine and there were ongoing QSOs. During
the passes I transmitted periodically on the repeater announcing my call and
'testing' to cause some audio on the repeater. Also had another station
transmitting on the repeater. Throughout the test I did not hear any
interference on the downlink. So also, I did not listen to the uplink
frequency since there did not seem to be any interference at that time. I
am using different radios for TX and RX, and antennas that are far apart for
the tests.
I'll check from time to time listening to the downlink. If I hear the
interference, I can both check the uplink frequency and also listen to the
local repeaters. There are many in this area.
73, Eric KV1J FN42 (West of Boston MA)
-----Original Message-----
From: Eric Williams [mailto:kv1j at comcast.net]
Sent: Tuesday, April 28, 2020 11:14 AM
To: 'amsat-bb at amsat.org' <amsat-bb at amsat.org>
Subject: RE: Repeater interference on AO-92
Yes, I am also listening to the uplink freq. Next pass is in about 1 hour.
73 Eric KV1J
(I use digest mode for this list so pardon the not including the string of
messages)
-----Original Message-----
From: Eric Williams [mailto:kv1j at comcast.net]
Sent: Tuesday, April 28, 2020 10:51 AM
To: 'amsat-bb at amsat.org' <amsat-bb at amsat.org>
Subject: RE: Repeater interference on AO-92
I am in the area of a suspected repeater. Also in the area of the towns
mentioned to could be that machine. I'll watch for the next AO-92 pass and
announce my call of the repeater a few times and listen to AO-92. So if you
hear "KV1J" it is me testing for the interference. I have not looked at the
pass schedule yet but I can try a couple passes.
73, Eric KV1J FN42
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