I have observed a 60 Hz buzz when receiving a local UHF repeater and
traced it to several fluorescent fixtures. The ionized column of
gas is modulated at 60 hertz and they can reflect VHF/UHF signals.
Try cycling the power to any fluorescent lights.
Bruce WB6ARE
On Nov 21, 2005, at 5:43 PM, n60sb wrote:
> I am using two Icom IC-2AT hand held radios as a low power "one way"
> repeater system. This system provides a full quieting signal into a
> local repeater whenever I use another HT around the house. The one
> way transmitter uses a yagi antenna in the attic and the frequency is
> set to a local repeater input frequency. The one way receiver uses a
> simple rubber duck antenna (high sensitivity is not an issue here) and
> listens to an offset frequency opposite that of the local repeater
> thus allowing me to listen to the local repeater directly on my HT.
> Everything works great with one exception. Whenever I stand in a few
> specific locations around the house, an irritating buzz is transmitted
> from the one way repeater.
>
> I did some additional testing and discovered that several other two
> meter receivers (various brands) in my home will receive a buzzing
> sound whenever I transmit from several specific locations within my
> home using various brands of hand held radios. The exact location
> where the HT produces the buzz varies with different receivers that
> are located in different places in my home. Incidently, it makes no
> difference if the output power of the HT is increased or decreased.
>
> This problem may be obvious to others, but my friends and I are unable
> to figure it out. If I knew what was causing this buzz, I may be able
> to resolve same. Any comments or help would be welcomed!
>
> 73!
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> Yahoo! Groups Links
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Yahoo! Groups Links
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