Bob Cain wrote:
Scott Dorsey wrote:

The reason it can be a problem (aside from mikes
with center ground taps on the transformer secondary) is that sometimes
those resistors are not very equal values.

How does this cause a problem (other than the rejection
issue)? If the same supply is presented to each side, and 1
is open, then current won't flow between 2 and 3 regardless
of the mismatch.

I didn't word that very well at all. If there _are_ center ground taps,
there is a ground path to pin 1, and therefore the imbalance is an issue.

In fact, even with the ground tap, if there are precise enough resistors
and a good enough transformer, it's a non-issue.
--scott

--
"C'est un Nagra. C'est suisse, et tres, tres precis."