[Sneap] 400 cycle transformers

[Jones, Paul]

Does anybody know a good, reasonably priced source of 400 Hz transformers ? I need both step down and step-up.
The specific one we are using now is a 70 VAC input with 1700 VAC output for our probe voltage power supply, but we are looking for a similar secondary voltage with a capacity of 1 Amp to drive a more powerful ion source oscillator.
Any ideas would be appreciated and should be sent to pwjones at unt.edu
Thanks.