Punch cards

[Les]

On Tue, 2008-04-08 at 21:11 +0930, Tim wrote:
> didn't expect - if you ground one side or the other of a floating
Most likely you have 60Hz pickup.  Since the transformer is not
grounded, it is a great 60 hz inductor, but the ungrounded balanced
condition makes it common mode so no response on the VU meter.
Grounding one side adds 60hz becuase it is no longer common mode.  Try
the Oscilloscope on it.

Regards,
Les H