I have an old isolation transformer, with a two prong secondary receptacle, one side being larger to accept a polarized two prong plug. I have a newer B eliminator (where B volatge comes off the line direct)with a 3 prong plug. With the secondary of the isolation transformer being isolated how can I accomodate the green wire on the 3 prong plug if I modify the tranformer?

:I have an old isolation transformer, with a two prong secondary receptacle, one side being larger to accept a polarized two prong plug. I have a newer B eliminator (where B volatge comes off the line direct)with a 3 prong plug. With the secondary of the isolation transformer being isolated how can I accomodate the green wire on the 3 prong plug if I modify the tranformer?
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::I have an old isolation transformer, with a two prong secondary receptacle, one side being larger to accept a polarized two prong plug. I have a newer B eliminator (where B volatge comes off the line direct)with a 3 prong plug. With the secondary of the isolation transformer being isolated how can I accomodate the green wire on the 3 prong plug if I modify the tranformer?

Dang! hit enter again instead of tab.
Once you hae the unit under test isolated from the AC mains. grounding is no longer necessary, and in fact might be a hazard, providing a ground for other ungrounded test equipment, etc. I installed a three pin chassis jack and left the ground pin unconnected. Since the purpose of the isolaation transformer is to isolate the AC from ground, I feel it is perfectly safe to leave the green wire (ground connection) back with all the grounded AC. After isolation, Hot, Neutral and Ground have no meaning anymore.
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Use a 3 to 2 pin AC adapter. (hardware store item) Leave the Green earth ground float, or cut it off. No need to modify the isolation transformer.

:Use a 3 to 2 pin AC adapter. (hardware store item) Leave the Green earth ground float, or cut it off. No need to modify the isolation transformer.

You are correct. I was building mine from scratch, so I bought a three prong.

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Does it matter which one of the plug prongs on the radio or test equipment, goes into the isolation transformer outlet? I hope I worded that properly.
Vinny A.

Does not matter at all. The only reason the there may be a polarized receptacle on the isolation transformer is, so you can fit a polarized plug into it.

Thanks Warren,
I ask because I finally bought one and want to make sure.
Thanks again,
Vinny A.

Just one thing more to consider, if you are, say, working on a guitar amp, and have removed the "death capacitors" and therefore are counting on the chassis being grounded via the "green wire" you could have a hum issue when testing.

:Thanks Warren,
:I ask because I finally bought one and want to make sure.
:Thanks again,
:Vinny A.
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