Tuesday, February 5, 2013

Update on the "Noise Problem" on UARC's 146.760 repeater

A bit of an update on the aforementioned noise problem on the 146.76 repeater's UHF link.

If you recall from a previous post (link) there was a source of noise that caused the UHF link used for Echolink and IRLP connections to "flap" - that is, if an internet connection was brought up, there would be bursts of noise that made communications rather difficult.
The site of the '76 repeater on Lake
Mountain during the summer when
there wasn't lots of snow on the

Initially, we thought that the problem had "fixed itself", but it now seems that this isn't the case and the noise will occasionally return.

We still can't get up the mountain to adjust the squelch on the UHF link receiver so we have configured the UHF link transmitter to be keyed up continuously, thus blotting out the noise source.

The side effect of this is that if an Echolink or IRLP connection is brought up, the repeater will be keyed continuously while that internet connection is active.  Rather than have the "Ker-Chunk" when one of the local users of the repeaters unkeys their transmitter, you will only hear the "Ker" part.

At some point we may add a beep to indicate to the local listeners that the local 2-meter user of the repeater has unkeyed, but that has not been done as of the time of this writing.

Hopefully, we'll soon get a chance to investigate the problem and, perhaps get atop the mountain to turn up the squelch a bit!