Dear drake lovers,

I am in the process of building a simple PS for TR4.
Judging from the circuit of AC4, I need a transformer
that can supply HV (~ 750V) and MV (~250V) and
LV(~ -70V).

I got a transformer with the following 2nd AC terminals:

- 289V/200mA: this can supply around 750V with
voltage doubling rectifying scheme.

- 207V/200mA: this can make a 250V.

The transformer had a 120/230V selection.  I wondered
if I could use one of the 120V primary as a AC source
for providing this voltage.

Also, for a 110V operation, do I need to connect the
two primary coils  in parallel or I can leave one as is.

Thanks for you answers and helps.

73,

Jonathan


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