22 Sep
2006
22 Sep
'06
3:42 p.m.
Are they really
that common in the States? They are not at all common in
the UK any more, so don't think of that as being a source for 50Hz pulleys...
If you were her than 50hz pulleys are a non issue. ;)
Lifes rough. The solution I used once for a 50hz and later a 400hz motor
was a simple transformer output pushpull amp fed with a wein bridge osc,
Sure.
I am told (and probably have the service sheet for) there was an AC/DC
mains radiogram sold in the UK that had an AC motor for the record
turntable. There was a unit, only used on DC mains, that consisted of 3
valves, acting as an oscillator and push-pull output (the last 2 valves
were probably 50L6s.). Of course there was no HT rectifier, since it was
only used on DC mains (The radio/amplifier section was the normal
series-string heaters and half-wave rectifier type of thing).
-tony