[R-390] New Owner

[Tim Shoppa]

Tom Norris wrote about single-stage IEC line filters:
> No asbestos underwear needed, that's the best and most sane  
> solution.  Since we aren't running these things off generators and  
> other "unclean" power sources or around high power transmitters (for  
> the most part), there isn't such a need for the brute force filtering 

> they were originally spec'd for. (IMHO)

And if you still want really good line filtering, you can sink some
bigger bucks (more than $30 last time I checked) into a two-stage
IEC line filter. It won't trip a GFCI, and it will be superior to the
original single-stage filter.

Probably overkill. You will note that if you look into the catalogs
most of these modern filters are intended not to stop noise from
coming into the device, but to stop noise from coming out! I think
there's somebody's theorem that says that if it stops it coming in
it will stop it coming out. (reciprocity theorem?)

Tim.