[RFI] FM Wireless Mic on 144.160MHz

[Hare, Ed W1RFI]

It should be easy enough to look at the unit itself and see what frequency it uses.  If it is not FCC certificated, then it could be high powered operating on any frequency.

________________________________
From: RFI <rfi-bounces+w1rfi=arrl.org at contesting.com> on behalf of Alex <alex at kr1st.com>
Sent: Saturday, August 29, 2020 12:14 PM
To: Don <kb5kwv at gmail.com>
Cc: rfi at contesting.com <rfi at contesting.com>
Subject: Re: [RFI] FM Wireless Mic on 144.160MHz

That would explain why my signals never bothered them. I'll check 72.08
as soon a it comes back on. Thanks for the suggestion!

73,
--Alex KR1ST

On 2020-08-28 22:25, Don wrote:
> Check 72.08 to see if it is the second harmonic of a 72Mhz mic or
> auditory hearing device. I had one they put in the top of the church,
> and it could be heard for a long ways around on the harmonic.
>
> A quick talk to the pastor, and I helped him change the frequency to
> something where the second harmonic would not bother.
>
>
> On 8/28/2020 7:43 PM, Alex wrote:
>> Hi there,
>>
>> A local church has a FM microphone that is transmitting on 144.160MHz,
>> and I can also hear it 20kHz above and below that frequency. I'm not
>> sure if 144.160MHz is the principal signal or if it's some mixing
>> product. Would anyone know what brand/model wireless microphone would
>> cause this?
>>
>> It wasn't much of a problem when they only used it on Sunday mornings,
>> but they have a ton of activities now and they use that microphone a
>> lot more. Tonight is movie night and the mic is on...
>>
>> 73,
>> --Alex KR1ST
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