[RFI] Electrical transfomer near shack, a problem?

[Jim Brown]

On 1/9/2013 7:34 PM, William Hein wrote:
> Should I be concerned about any RFI from the transformer's magnetic fields?

Not RFI, but don't overlook the possibility of baseband (power 
frequency) leakage magnetic fields around large transformers, or even 
from the ground wiring for those transformers.  Such fields are coupled 
to loops of wire, and to unshielded audio transformers. 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.

I wouldn't worry too much about a transformer serving only your home, 
but I might be concerned about one serving many homes.

73, Jim K9YC