Need help learning - Conn StroboTUNER ST-2

[nickb]

Household ground at the wall outlet. I suspect it is just ghost voltage that will disappear when 3prong cord installed and chassis grounded.

Thx.

Duh! He did say that, didn't he! Yes, well all you are seeing the effect of stray capacitance. It's (almost) meaningless.

[Enzo]

The multitap transformer has a lamination gap that can be closed or opened by a set screw. This is used to get your operation in range. You still calibrate against mains freq each session.