[Elecraft] QRM and filtering

[Phil Kane]

On 10/22/2010 4:08 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.

  When I was doing residential RFI-hunting in the 1970s-1990s,
  doorbell transformers were the number one source of intermittent
  buzzing radio noise.

--  73 de K2ASP - Phil Kane
    Elecraft K2/100   s/n 5402