word of caution to those who have their transformers converted: make sure the replacement transformers produce the same secondary voltage and current as the originals. some unscrupulous techs replace only with the nearest value, say 9 or 12 volts for a 10 volt secondary. that would be synonymous to using a 90 or 120 volt supply to your 100 volt equipment.
Oops, this gets me a bit confused. I'm not a technician, just a hifi enthusiast willing to learn from those properly trained in this field. I don't understand why the output on 100v transformer becomes relevant again after conversion.
What if I do this:
1. Remove the old 100v transformer and put voltage labels -- say, 6v, 9v and 12v -- on the wires cut using the transformer tap values as basis.
2. I plug in the replacement 220v transformer (same same size and wattage) and test if the corresponding taps -- 6v, 9v, 12v -- produce accurate values. I'd probably do it immediately after plugging and after 2 hours to see and hear if the voltages vary or the transformer hums when it gets hot.
3. If I get the desired results, I install the new 220v transformer in my equipment.
My question is, would there be a problem with that?
It's that simple to me but I could be wrong. BTW, this is not OT since this could apply to smaller surplus 100v amps where conversion cost could be practical.