>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..
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.
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