[Amps] Isolation Transformer

[David C. Hallam]

I recently picked up a medical grade 3KVA toroidal isolation 
transformer.  It has dual primaries and secondaries so in addition to 
being a isolation transformer it can be used as a step up/down 
transformer.  I had two ideas in mind.  One was to use it as a 1:1 
isolation transformer when working on radios with a hot chassis.  The 
other was to use it as a 2:1 step down transformer for a linear map I 
have with a 120V primary transformer.  This thing draws too much current 
to use on 120V unless you have a special dedicated line.  With this 
transformer I could step down a 240V line to 120V.  Since this is an 
isolation transformer, I am assuming I would need to have a direct 
ground connection for the amp.  I am I correct or is something else needed?

David
KW4DH
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