[GCARC] Signals Interference Question

[Al KB2AYU]

Yes, "grow" lights and cheap LED lights are know to be interference 
creators.


On 8/26/2018 12:13 AM, David Wade wrote:
>
> Thanks very much for your reply, and the info and suggestions. This is 
> probably the most specific info (57 kHz and temp. changes causing 
> frequency sweeping) that I have received so far.  Unfortunately, I am 
> a renter and am unable to shut off house power as it would affect 
> other residents.  However, there is usually a power failure or two 
> during the year, due to storms, and, if circumstances allow, I will 
> use that opportunity to test the internal interference source theory.  
> The neighborhood in which I live has closely spaced houses, and a next 
> door neighbor appears to be a horticultural enthusiast.  Maybe the 
> interference is due to horticultural lamps.  I may just have to live 
> with it. Thanks, again, very much for the reply and info.
>
> David Wade (KD2NZS)
>
> Pitman, N.J.
>
> *From: *Al KB2AYU <mailto:kb2ayu at comcast.net>
> *Sent: *Saturday, August 25, 2018 11:47 PM
> *To: *gcarc at mailman.qth.net <mailto:gcarc at mailman.qth.net>
> *Subject: *Re: [GCARC] Signals Interference Question
>
> Most likely a close by piece of crap consumer electronic device.
>
> It could be in your own house, but could also be several houses away.
>
> 57 Khz is in the range of the typical switching frequency of a power
> supply/wall wart.
>
> As the temperature changes, the frequency of the device changes too,
> thus the slow sweep.
>
> You have to shut off your main breaker and have a battery powered
> receiver to make sure it isn't in your house.
>
> If it's not, good luck finding the device in someone elses house.
>
> Man made electronic noise is the biggest problem hams face today.
>
> Lots of cheap, poorly engineered, chinese junk being sold.
>
> Al
>