NOS Sola 1.5kv ferro-resonant transformers?

A couple of the above were gifted to me...worth running my dedicated lines through?
Do they create a physical noise?
Junk them?
Thankyou in advance for any input.
ditch em..

are they the voltage correction one's??

as long as the filter caps are good.. try them...

My gear was never quite with the ones I had.. transformers hummed like crazy!!