Congratulations.
This phenomemnon is refered to by the Fredom Net Repeater Orginization
as "The Beast". It is desence that appears + and - 600kHz from the
output of any 2M transmitter, If you have a spectrum analyzer
connected to your duplexer you will notice grass that comes up only
when a carrier signal is present. The dead give away is the
possibility for audio feed back including CTCSS tone, this sounds real
humorous when combined with a digital or analog audio delay line.
You must search for a switch mode battery charger in close proximity
to your site, Paticuallary boats like to use these damn things. A
handheld with a band pass cavity tuned to the input, a switched
attenuator, and an 4 element yagi is what was used to Fox Hunt ours.
Happy hunting.
On 4/21/06, Dave VanHorn <[EMAIL PROTECTED]> wrote:
>
>
> Two VHF repeaters in town have been bothered by this from time to
> time.. The first, which only occasionally gets it, but gets it LOUD
> when it happens, is 146.730- The second (mine) at 146.850- is
> getting it almost continuously now, but weak, ranging from "will
> open squelch" (even with PL!) to "Will hold squelch but won't open
> it" Unfortunately, it's putting enough energy out at low
> frequencies that the PL board is seeing a tone, so PL won't save me.
>
>
> The noise has an echoing quality that I think is VERY distinctive,
> but I can't figure where it's coming from.
>
> It's not happening in either repeater, we've had the opportunity to
> completely shut down the machines when it's happening.
>
> The two repeaters are maybe 1000' apart.
>
> I've only started having a problem with it since replacing my
> antenna so that I'm no longer stone deaf.
>
> I have a 5M wav file of the noise, if anyone's interested.
> It sounds like broadband noise at first, but then you notice
> the "feedback-ish" sound in it. At times we've heard what seems
> like bits of audio in the noise.
>
>
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>
> Yahoo! Groups Links
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Yahoo! Groups Links
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