Id check out the primary circuit carefully in the Johnson David.
In the Thunderbolt II (aka Tempo 2000) they used the neutral as a ground on
120 & 240. In fact they tied the neutral and ground together for 120V
operation!
Carl
KM1H
----- Original Message -----
From: "David C. Hallam" <dhallam@rapidsys.com>
To: "AMPS List" <amps@contesting.com>
Sent: Sunday, August 09, 2009 12:00 PM
Subject: [Amps] 240V Outlet
>I need to put in a new 240V outlet at my operating position. Since one
> of my amp power supplies, a Johnson 2000 has the low voltage portion
> operating on 120V, I suppose I have to put in a 3 wire plus ground
> circuit.
>
> David
> KC2JD/4
>
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