[R-390] Isolation Transformer

Mon, 04 Aug 2003 05:27:14 -0400

Dave,
This was on the Collins reflector.

Jim

Forwarded for W8ZR

John Page K4KWM
Hollow State since 1953
(ex W8PKU,N8BLB,NA8O)

>From: "James C. Garland" <[email protected]>
>Reply-To: [email protected]
>To: Old Tube Radios <[email protected]>
>Subject: FS: mother of all isolation transformers for boatanchors
>Date: Sat, 02 Aug 2003 11:44:41 -0400
>
>Hi Gang,
>I had hoped to wire this transformer into a dedicated hamshack circuit to
>reduce 120VAC to 110 VAC, but I'm not allowed to in this house. This is an
>amazing transformer. Here are the details:
>
>Model: Signal Transformer DU-7.5
>
>Primary Windings: dual primaries, each tapped at 104 VAC,  110 VAC and 120
>VAC. They may be wired in parallel or series.
>
>Secondary Windings: dual secondaries, each tapped at 104 VAC, 110 VAC, and
>120 VAC. These also may be wired in parallel or series.
>
>Frequency: 50 Hz - 400 Hz
>
>Current: 62 Amps parallel connected, 31 Amps series connected
>
>Power Capacity: 7.5 KVA
>
>Isolation: Electrostatic shield of 2 mil copper foil between priimary and
>secondary windings
>
>Weight: 105 lbs
>
>This is a new and unused transformer, current production. You can see the
>spec sheet at
>http://www.signaltransformer.com/signal/products/pdfs/pgs28_29.pdf
>
>Price: $125
>
>Now the bad news: this is pick up only in Oxford, OH, near Cincinnati.  I
>can't handle shipping this brute.
>
>Tnx and 73,
>
>Jim W8ZR
>

----- Original Message ----- 
From: "David Medley" <[email protected]>
To: <[email protected]>
Sent: Sunday, August 03, 2003 22:16
Subject: [R-390] Isolation Transformer

> I am being driven crazy by the earth leakage cutout thingies or whatever
> you call them. The leakage due to the line filters especially in older
> radios trips them all the time.
> Can anyone advise me where I can get an isolation transformer about
> 750-1000 watts.
> Thanks
> Dave