All,
A couple months ago I posted a question about in-band linking. I thought
I'd post an update on how it seems to be working.
The repeater is on 442.750+ running about 25 watts. It's a converted Micor
mobile.
The remote base listens on 443.025 and transmits about 25 watts on 448.025.
The repeater it's talking to is about 90 miles away over a very good path.
The remote base is an Icom 900 module attached to an FC-900.
The repeater shows no obvious desense, and the signal strength of the link
is full-quieting. There is one odity, though. The link seems to have some
sort of high-pitched, low--amplitude, squeel on it. I assume this is some
spur from the repeater's transmitter. We plan to try to notch that out when
we get a chance.
There is one odity, though. The Micor has been in service for about 2 years
now. When we first set it up, the receiver sensativity was about .35 UV.
Now, we can't get it to come below about .7UV. I should point out that we
didn't do the full tuning procedure, we just tried to tweak things back into
place. Also, the Micor has not been checked since it was put in service 2
years ago... That is, it hasn't been checked until it was moved yesterday.
My question is, is there anything that commonly goes bad in these things
that might cause this? We have plenty of spare receivers around, so that's
not an issue, I was just curious if anyone had any ideas of things to check.
Also, does anyone have any simplified tuning instructions for the UHF Micor
mobile or any tips that might make the procedure go more smoothly?
Thanks,
Chris, KG0BP
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