[RFI] Peculiar Noise & detection

[bill steffey ny9h]

*IF THAT WAS ME *...   it was not from the wireless mic receiver; BUT 
unbelievably it was coming from an audio mixer that had a dc-dc 
converter gone wild.... I remember it well....   We (you and I sniffed 
it with my then crude SA)  and then the factory flew up 2 guys with the 
legit spectrum analyzer.   ...and no one could believe it...till they 
saw it .. sweeping across the input of the wireless receiver..That 
sounded great on the NEW churches PA system.

  still have two of those auto-mixers from 30 years ago...


On 12/23/2023 5:05 PM, Jim Brown wrote:


> On 12/23/2023 1:28 PM, k1ttt.dave at gmail.com wrote:

> ........, we traced that sort of issue to instability in the preamp 
> for wireless microphone receivers. It helped that the contractor on 
> the project was a ham.
>
> 73, Jim K9YC
>
>
>
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