On 5/22/2019 11:51 PM, geoff wrote:
If the mains transformer can't be jumpered for 220vac, I will get a
replacement (available) and find the Rs and Cs to change for 50Hz. And
may as well change all those old resistors with 1% all around, and recap
for good measure.
If yours is like the schematic, the transformer has two primary windings
connected in parallel. Rewire them in series and it should work on 220v.
There's "magnetic polarity" so be sure maintain that when rewiring. Pay
attention to the wire colors and connect it up so that it looks like
there's an unused center tap on the primary.
Before you change the oscillator components, see if you can get a 50 Hz
strobe disk. Somebody who gets it after you're bored with it might want
it "vintage."
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