Scott this may have nothing to do with it but I have a similar problem with
a micor repeater and ICS M controller. It caused me to keep checking audio
circuits etc looking for the problem. I then discovered that when I turned
the power control down to a certain spot the problem would start and when I
increased power it went away. Seems that the power control being at a point
caused oscillation. Like I say made a heck of a noise and would stop and
start whenever it wanted( usually when it IDed). I have yet not been able to
figure why it does it as I retuned the final. I will be watching to see what
others might have for suggestions to.
Steve
----- Original Message -----
From: "Scott" <[EMAIL PROTECTED]>
To: <Repeater-Builder@yahoogroups.com>
Sent: Friday, January 06, 2006 12:52 AM
Subject: [Repeater-Builder] Help / suggestion needed...feedback? on Mitrek
>I have a UHF repeater built out of a trunk mount Mitrek (Motrek), has
> CAT 250 controller, 3 can duplexer rated around 300W. Current output
> is about 23-25W into duplexer. No external amp. Control head is on
> radio, mic disconnected. Factory tone reed board for RX tone, TS32 for
> TX tone. Antenna good swr and condition at 150 ft feed with 1 1/4"
> heliax. 15 amp switching power supply. All controller to radio cabling
> is done inside the radio with highly sheilded cable with shield
> grounded to 12- buss inside radio. Controller is in a factory metal
> rack case.
>
> With RX tone ON (in CAT), repeater will key up and start some God
> awful squawl for about 5 seconds then unkey. Repeater is almost
> unusable when this happens, continuing to squawl when anyone tries to
> use it. Squawl continues until squelch tail ends. Sometimes a cycle
> off / on fixes it.
>
> With RX tone OFF (in CAT) the squawl usually only happens when the
> repeater kys up with voice ID, starting at the second letter of call
> and ending when ID finishes. Repeater can then be talked on
> immediately, and usually will function properly (sometimes still does
> glitch, but only for a second or two.
>
> When working properly, has one of the best RF and audio signals I have
> ever heard on a machine.
>
> Suggestions?
>
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>
>
> Yahoo! Groups Links
>
>
>
>
>
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