Found an RCA CTC5

[Kevin Kuehn]

Originally Posted by cbenham

The CTC5 25Hz power transformer will run perfectly well on 60 Hz. In fact it will probably run as cool as a cucumber. It doesn't need replacing as long as it checks OK.

I have an Admiral 7 inch 19A11 set that was built in Canada with a HUGE!!! 25 Hz power transformer and it runs very cool on 60 Hz here in PA.

Cliff

That's what I was thinking. You can always go up in frequency, but you need the larger core size to pass 25Hz and stay cool. No need to change the primary voltage, that is always primary to secondary turns ratio dependent.