The purpose of the ground wire in a 120v/240v branch circuit is to blow the
fuse if a hot wire touches the metal cabinet. The RF grounding system is a
horse of another color and usually has it's own ground rod seperate from the
service main.
Jim
N7FCF
----- Original Message -----
From: "David C. Hallam" <dhallam@rapidsys.com>
To: "AMPS List" <amps@contesting.com>
Sent: Sunday, December 13, 2009 3:42 PM
Subject: [Amps] Isolation Transformer
>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
> --
> National Health Insurance
> * Compassion of the IRS
> * Efficiency of the Post Office
> * Cost Control of the Pentagon
>
>
> _______________________________________________
> Amps mailing list
> Amps@contesting.com
> http://lists.contesting.com/mailman/listinfo/amps
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