Joe,
Because the separation (about 45 MHz) is significant, you might consider
installing a cavity filter on your receiver input. A less expensive
solution might be to order up a helical resonator filter from DCI.
Don't forget that the FM station operator has an obligation to not
interfere with other licensed stations, so he/she must step up to the
plate and be a part of the solution. Write a letter to the station
manager explaining the interference problem, and ask for his/her
assistance in reaching a solution. Don't wait to do this!
73, Eric Lemmon WB6FLY
Joe wrote:
> I just got a new neighbor at my 6 meter repeater site, a low power (30
> watt) FM broadcast station on 94.9 MHz. I now have low level
> interference on my MastrII repeater input frequency.
>
> As a simple troubleshooting tool, I thought about putting a low pass
> filter on the receiver or the antenna connection to the duplexer. This
> would attenuate any 94.9 MHz signal coming down the coax. My thoughts
> are to take the low pass filter out of a MastrII PA, but I don't know
> what the input impedance to it is. Does anyone know if the final PA of
> a MasterII is 50 ohms into the low pass filter? I believe that it is,
> but not sure.
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