[RFI] FM Wireless Mic on 144.160MHz

[Michael Aust]

Don Here a wireless Mic transmitter 72MHz to 75MHz x2 2nd Harmonic in the 2meter Ham Band 
https://www.listentech.com/shop/product/portable-display-rf-transmitter-lt-700-072/
73MikeWB6DJI 

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 On Friday, August 28, 2020, Don <kb5kwv at gmail.com> 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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