[Lowfer] Strange QRM here on SAQ frequency

[Bill Cromwell]

Hi,

I'm late to post here because the example I have that sounds identical 
to this is intermittent. On for a half second or so and then back maybe 
15 or 20 seconds later. Mine was an outdoor electronic anti-mole device 
(that didn't discourage moles) in the next door neighbors yard. Since it 
didn't discoutage moles and they knew it caused radio interference the 
devices (two of them) went to the landfill. With DSP I was able to copy 
CW signals that were in between the 'horns' of those gizmos..supposed 
filter BW under 90 Hz.

Good luck getting this sorted.

73,

Bill  KU8H

On 07/06/2014 09:32 PM, Graham wrote:
> Bill,
>
> Got to thinking some more on your strange RFI / EMI.
>
> I don't think I have ever heard the type of emi/rfi that an electric 
> fence or invisible dog fence might generate so I have no point of 
> reference with those.
>
> However, the types of emi/rfi that I do see are aside from furnaces 
> and airconditioners and is on and off during the day is that from 
> dimmer switches, outdoor sensored lights, hair dryers, and networks 
> but they don't seem to bother me too much  and except for networks are 
> short lived and are on and off fairly quickly. Network emi/rfi tends 
> to be more HF.
>
> If what you have is on nearly all the time and is it possible that 
> someone local has started to use a home network using broadband over 
> power line?  I have never heard or am familiar with the spectrum of 
> this this type of emi/rfi maker.
>
> In Embrun we have both smart power meters and remote reading water and 
> gas meters. I think the water and gas meters use some sort of VHF 
> frequency but have been unable to verify; I don't know about the 
> "smart power meter" however.  I didn't notice any new emi/rfi suddenly 
> appear when any of those devices were installed
>
> do let us know if you ever figure out the source of your strange QRM.
>
>
> cheers, Graham ve3gtc
>
>