other uses for toroid output autoformers?

[Zero Cool]

I have at least 4 if not more autoformers removed from junked PA power amps. 2 are Crown and 2 are QSC and both were 200wpch so these are pretty hefty toroids.

These were used to convert the standard amp output to a high impedance output for driving 70V or 100V distributed line systems. so these have an 8ohm rated input and a 4ohm/70V/100V output typically. I have no idea what they actual specs are but they would be pretty wide bandwidth typically.

should i scrap these or do they have a use??

 

[dave_gerecke]

Hey ZC, if nothing else you can wind your own coils or transformers with them. I would suspect that they have a pretty hefty core.

Peace,

Dave

 

[BudP]

You could make high voltage lateral Fet SE amps with them. Gary Pimm has made some excellent SS amps using higher than normal voltages, Fets and transformers. Don't ask me for more than this, as I know not how to. Nelson Pass may be willing to help though.

Bud

 

[Zen Mod]

only parafeed

look for Nemezis - Hiraga

 

[Speedskater]

From time to time on the various audio forums, people have problems with 70V systems and those transformers are a perfect solution.

 

[PeteMcK]

used 'backwards', they can be used as valve op transformers, there's an Aussie site that does that, can't find it at the moment

edit: found it:
http://home.alphalink.com.au/~cambie/6AN8amp/6an8amp.htm