[Elecraft] QRM and filtering

[Nick-WA5BDU]

Quite a coincidence.

In 1978 I had horrible RFI that blanketed HF and 2 meters and also 
affected TVs and even people's stereo systems. Naturally, my neighbor 
asked if it could be my ham radio.  At one point I looked out and saw 
another guy walking up and down the street with a portable radio, the 
same thing I'd been doing.  But it was impossible to localize the noise 
- it seemed to come from every power pole and every circuit.  Finally 
the power company was called in and they found that the source was my 
neighbor's doorbell transformer.

A couple years later I'd bought a house was seriously chasing DX with 
the great sunspot peak when the same kind of noise came back. Again, 
neighbors up the street wondered if it was my ham radio.  And again, 
attempts to trace the noise were futile.  I finally walked up to the 
neighbors' house, which did seem pretty hot, and pressed the doorbell 
button.  The noise stopped momentarily.  So I told them their doorbell 
transformer was likely at fault and they replaced it.  Problem solved.

73-

Nick, WA5BDU

On 10/22/2010 6:08 PM, Dick Williams wrote:
>
> After a little "detective work", I traced the source of the interference to
> the doorbell transformer.  Disconnected it, and told him to go buy a new
> one.  Of course we were both "happy campers".
>
> Dick  K8ZTT
>