Hi William
I have the same problem caused by the switching voltage regulator inside
the LED spot
light in the cowling. One ferrite core was not enough to fix this problem.
I will test an EMI Suppression Filter, close to the LED, as next step
and will inform you about the result.
Ruedi Vogel
Am 28.10.2018 um 22:43 schrieb William Bliss:
>
> Hi all
>
> I have installed bright LED's into the cowling for improved visual
> conspicuity. When the engine is not running I now have audible
> breakthrough white noise through the headsets in time with the
> Skyflash strobe light (which is mounted on the tail). I have had no
> problems with the strobe system up until now. While flying the white
> noise was continuous but I was able to partially stop it by altering
> the intercom squelch. I then found I had no interference on one
> frequency but still had lots on another frequency. Radio
> communications do not seem to be affected. The LED and Strobe
> circuits run off separate contact breaker switches. Radio and
> Transponder are Trig which work ok up to now.
>
> There is no high frequency noise suppresion in the LED wiring. I will
> try running the power cable through a ferrite ring close to the LED
> unit. Any suggestions?
>
> William Bliss G-WUFF Mono
>
>
--
Ruedi Vogel, 3380 Wangen a.A.
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