It was a combination of a switch mode battery charger in a boat about 300 feet from the antenna to give me a perfect mix 600kHz off the transmit frequency, lower side band of course (still trying to figure that one out) that was so good that it would cause the repeater to occasionally feedback audio wise. Also some loose PL-259s on the capacitance stubs of the WP-639 duplexer causeing some desence after the inital problem was cured.
Repeater was clocked at -121.5dB to open the squelch with no desense at 110W from the transmitter. Compare that to running at 5 watts to try to beat the mix and it still sounded like crap.
Things are so good I am going to upgrade the antenna back to the station master clone after I rebuild it. Having proper test equipment makes all the difference in the world.
On 1/12/06, Paul Finch <[EMAIL PROTECTED]> wrote:
Jay,
Nope, I thought there would be more on this message board that knew Walt, at
least his power supplies. Sorry for this OT post.
Paul
-----Original Message-----
From: [email protected]
[mailto:[email protected]]On Behalf Of Jay Urish
Sent: Wednesday, January 11, 2006 11:33 PM
To: [email protected]
Subject: Re: [Repeater-Builder] OT - funny interference story
hmmmm Walt Whitman?
Paul Finch wrote:
> Hello,
>
> Another funny interference story, I may have put it on here before but it
> bears repeating. One of the Police repeaters in the area that the shop I
> worked for and maintained was getting a stable, slightly off-frequency
> signal modulated with a 1000 Hz tone but without CTCSS. It did not key up
> the repeater but interfered a lot with the HT's they were using. This had
> been going on for 2 or 3 days. The FCC was called and could not find it.
> The manager of the Water Department was a Ham and knew of another Ham that
> made a hobby of finding these problems. This guy had a van with a 22
> element home made Yagi mounted on the top with a shaft going down into the
> cab, he used a pair of Vice Grips as a handle! Anyone know who this "Guy"
> is? He is also famous for the power supplies he builds.
>
--
Jay Urish W5GM
DCARA President ARRL Life Member
TXFCA President ERS Vice-Prez
Denton County ARRL VEC
N5ERS VP/Trustee
Monitoring 1292.30Ghz PL-100.0 441.375 PL-88.5 and 444.850 PL-88.5
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