[Elecraft] OT Local QRN what is it? UPDATE!

[Steven Pituch]

Hi All,
I had mentioned previously that I just ordered a nice treadmill after a lot
of research.  When I read about this possible interference I sent an email
to the company.  Within an hour I got a phone call from a very knowledgeable
person.  He stated that as far as he knows all treadmills except Precor and
Woodway use PWM to regulate the DC motor.  He said RFI could emanate from
the motor along the AC plug, or radiate from the PWM circuit.  He said that
if it was from the PWM it would be very difficult to resolve, as it would be
picked up by the antenna.  He said both types of interference were
definitely possible.  He also stated that if I wanted to buy a Precor or
Woodway I would be talking about $4500 for an entry level machine.

I talked it over with my wife and since I doubt I will be on my K3 while on
the treadmill we decided to keep the treadmill we ordered.  I feel sorry for
any ham who is suffering RFI from a neighbor's treadmill.  Better to work
with them than to call the FCC on them.

Steve, W2MY