Good suggestion Tim and thanks to others for their suggestions too.
I'll give this a try and see how it pans out. I can sure test the
theory with a VARIAC. The original transformer is rated at 7.25V @
10A so I think the current capability is sufficient-- just too low of
a secondary voltage.
If I had a penny for every time I 'thought it was sufficient/OK/not the
fault/,,,' I would have no problem attending a VCF in the States :-)
More seriously, I much prefer to make mesaurements and do tests before
changing anything. That way you know what is going on, you know what the
problem really is, and you can correct it. Not do something that seems to
work now and whcih will cause problems later.
Since in this case the first test is an easy one to do (namely measuring
the AC voltage from the transformer secondary winding), I wouldn't even
think of not doing it.
-tony