[Elecraft] QRM and filtering

[Phil Kane]

On 10/22/2010 7:49 PM, Jim Miller wrote:

> What is there about a transformer that causes so much grief? Curious...

  If you mean the doorbell transformer, the insulation dries out
  and turns start shorting, leading to excessive heating and
  internal arcing.  They usually have an internal thermostat to
  cut it off when hot, and after it cools down it starts all
  over again.

  If you mean the big black can on the pole, it's rarely the
  transformer's problem, usually it's loose hardware or arcing
  over the insulators.

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