[RFI] Electrical transfomer near shack, a problem?

[Paul Christensen]

> Virtually all audio transformers used by hams are unshielded -- shielded 
> transformers are used in pro audio (Jensen, of Burbank, CA is the Cadillac 
> brand), but they aren't cheap.

Adding to Jim's recommendation, I believe Cinemag is still producing 
high-end shielded audio transformers similar to the Jensen series.  Also, 
with some luck, UTC audio transformers can be had for less than the Jensen 
types and are more than good enough for our purposes.  There are many 
decades of these out there in old equipment and in parts bins.

Paul, W9AC