- Jan 1, 1970
[email protected] said:I'm sorry. I didn't mean to upset anyone. This is a real question to
me since I need a high-voltage step-up transformer for an RF amplifier
and was planning to use a power distribution transformer backwards,
but it's expensive so I wanted to make sure it will do what I want
before I buy one. Again, sorry I'm being a pain. I won't ask any
more dumb questions. Robert
When I was in high school, I did exactly what you are suggesting to
generate the high voltage to power four 811A s in parallel, running
around 500 watts input. I used 866 mercury vapor rectifiers....
The transformer was a 5 kva pole pig that I bought from the power
company, taken out of service, for around $10 ( in 1960 )...
I drained the transformer oil out.....since I wasn't running it
anywhere max ratings, it didn't need the cooling.
I "think" the secondary was two 220 windings and the primary was
somewhere around a couple thousand volts..... I most likely ran
the primary from 110 and ended up with around 1200 volts for the
811A s .... I don't remember the voltages accurately anymore, but
it was very straighforward..... The idling current is not very high,
more than an amp or so maximum, so don't worry about blowing
out fuses since your 220 is probably at least a 20 amp circuit.
pole pigs are well made, and very efficient, since the power company
doesn't want to waste power on magnetizing current any more than
Andy in Eureka, Texas W4OAH since 1960