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Re: [Amps] Source for plate xfrmer

To: Steve Bookout <>
Subject: Re: [Amps] Source for plate xfrmer
From: Rob Atkinson <>
Date: Tue, 14 Feb 2012 10:38:57 -0600
List-post: <">>
Steve:  It looks like you are in pretty good shape with the caps.

>I guess there is some electrical code that forbids connecting the 120vac 
>blower between one side of the 240ac >line and neutral?

You typically have two hots and ground no neutral return.  You connect
a 120 v. fan across one hot and CT on the plate iron primary.  that's
okay to do.

>You can get more benefit with primary taps and not bothering with a pair of 
>120V windings; use a seperate 120V >line for blowers, LV supplies, etc.

Good point about the multiple primary taps--that's a better idea.  I
do the separate line thing for my rf deck fan also.

>Tapping the secondary limits your KVA as you go to lower voltages and who the 
>heck needs a CT in a big amp?

CT on secondary may never be used but more taps usually means faster
easier sale if it is ever listed.   Extra 6A10s good idea they're
cheap insurance.  Also tnx vy much for the description of the choke
input setup--i have been looking for some brief easy to follow
description like that minus 3 pages of impenetrable engineering.

Steve I forget what this thing is you need iron for but don't let a
cabinet box you in.  Throw away part of the cover, put the thing on a
rack shelf in a 4 foot tall rack and put your big stuff, iron, caps
what have you in the bottom.

BTW I have Electro mod iron and big chokes--they are well made.
Electro supplied iron for Sparta bc rigs.



On Tue, Feb 14, 2012 at 10:00 AM, Steve Bookout <> wrote:
> Hello again, Rob,
> Caps are Nippon Chemicon KMH series 470 mf @ 450v  About 1 1/2 inch dia by 2 
> inch height.  Actually, there were 12 of them, not 10 like I said before.
> Steve, NR4M
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