Re Stewart and Variacs:

- apologies here, it appears my Variac is an autoformer, I had presumed it was
an isolation transformer. This leaves the question, why does it appear to have
a beneficial effect? And, of course, what better effect could be achieved with
a similar size isolation transformer? Has anybody tried putting two toroids in
series with their highest secondaries tied together? This has been recommended
elsewhere. Andy

=== Andy Evans ===
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