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[AMPS] HV Power Supply for 3-500Z

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Subject: [AMPS] HV Power Supply for 3-500Z
From: (Radio WC6W)
Date: Thu, 25 Feb 1999 00:36:00 EST
>What taps can I use??
>Have a like new!!! but old United Transformer Company Type S47 hv
>transformer  115 vas primary secondary taps at 2000, 2500, and 3000 vac
>center tap. 32 mf 4500 vdc cap and GE commercial full wave bridge. The
>transformer weighs in at 25 lbs. No current rating but according to the
>Twenty-Third Edition of the Radio Handbook should have an IVS of about
>1.5 KW. Actual AC checked at the line here in house is 128 vac.
>Again....what voltage taps recommended for a pair of 3-500Zs ...remember
>this is a  full wave power supply..

HI Jer,
   Use a different transformer!  :-)

   As noted by Rich, Dave and the UTC catalog the center tap of the S-47
is designed to be operated at ground potential.

   That transformer is also only rated at 300 mA with a choke input
filter at 1275 volts output,  which is the ICAS rating so... it is way
short of adequate for a pair of 3-500Z's   :-(

   & a note regarding Joe's post... I think you mistook the ratings.  The
numbers Jer quoted were across the full secondary.

   Marv  WC6W


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