[RFI] RFI Noise Problems

Tom Thompson tlthompson at qwest.net
Fri Jun 28 15:56:46 EDT 2013

Hi Tom,

Any number of things could be causing that kind of noise, but my grow 
light noise sounds very similar to that.  It is usually on a timer and 
has a different sound when the grow light is first turned on.  It is not 
the light but the switching electronic ballast that causes the RFI.

Good luck and 73,

Tom   W0IVJ

On 6/28/2013 12:12 PM, t.izak wrote:
> Hi Gang,
> Been having this RFI noise issue now for the past few months. Comes on at
> different times since it is on a timer type system. We lost power a few
> times and this dis-rupted the timer so it came on later, etc.
> It was off for a few days and thought whatever it was, finally burned out.
> Then it came back on 24 hrs for about three days straight then finally went
> back to the 12-16/hr stint.
> I got it on tape yday aftn as it now comes on @ 6:00p.m.  At first, I can
> hear a "click" sound (all was recorded in AM mode on a K3), then came the
> igniting of something or other and then it had a "whirring" sound like a
> motor spinning. This was for about 5-10 secs then it sounded like it finally
> came up to speed and had a "buzzing" sound for the noise issu but you could
> still hear the whinning thru the buzzing. I only recorded about 2-3 mins of
> it.
> My next door neighbor has an in-ground pool and I asked him to turn off the
> main breaker to see if it was his house the RFI was coming from...still had
> the noise issue but don't know if he understood what I was telling him to do
> about turning off the "main breaker". I have my 6m yagi pointed in the peak
> direction of the RFI noise and seems to be centered over his house.  There
> are two other houses I can check later but does anybody have any idea what
> type of apparatus this might be creating this RFI?
> HELP !
> Many thanks,
> 73
> Tom/k1tl...
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