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

[David Christ]

Very interesting.  I own a Precor treadmill.  I just went down and 
tested it.  No interference at all on 20.  Didn't check anything else.

Didn't pay $4500 for it either.  Got it from a dealer friend of mine. 
It was a new one that never worked so it sat in the warehouse.  He 
said I could have it if I could fix it.  In 10 minutes I found a bad 
RJ-45 connector.  Works great now.

Maybe I should put a small shelf on it so I can work treadmill mobile.

Any lawyers out there?  In a situation like this where a device's 
design and construction creates interference, does the owner have all 
the abatement responsibility or does the manufacturer retain the 
responsibility as they manufactured a defective device incapable of 
being operated legally?

David K0LUM

At 10:20 AM -0600 1/20/10, Steven Pituch wrote:
><snip>



>   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.