You are thinking power xfrmr, where an isolation xfrmr is isolating from
ground loops, or possibly even dc.
A 1:1 unun is isolating from rf, the "choke" is implied!

Regards,
John

"John Smith" wrote in message
...
You are thinking power xfrmr, where an isolation xfrmr is isolating from
ground loops, or possibly even dc.
A 1:1 unun is isolating from rf, the "choke" is implied!


we-yell ah reckon the only time I ever heard of - or seen one of dem-there
isolation transformers was in the context of power xfmrs. They were usually
shielded as well. The applications were usually 'computer-rooms'.

Wonder if we could use a 240 primary to 120v secondary as a 4-to-1 balun ?

Hey, you could, but "220v-110v HF power transformers" are rare... unless you
buy "Baluns", or, "RF Auto-Transformers" (I made up that name grin) then
they are plentiful!!!!

Regards,
John