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Old PT question
#1
I’m back to tinkering and hopefully building a couple more amps.  The first thing I’m doing is replacing a PT and converting a modified pig nose to 6v6’s

My PT has the following secondary taps
350-0-350
7-0-7
2 wires that measure 4 v across them

Forgive me if I should remember this stuff but I’ve been away for 5-6 years and I think I forgot most of what I learned.

What would a 4v tap be used for?
Is there a way to leverage both sides if the 7v to provide additional heater current.

Thanks for looking
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#2
(01-11-2020, 01:46 PM)Sdp123 Wrote: My PT has the following secondary taps
350-0-350
7-0-7
2 wires that measure 4 v across them

What does the PT come out of ?
These are no load measurements, or voltages printed on the transformer ?
The 4V wires, are they thickish, or as thin as the 350V wires? My guess would be that they are for heating an AZ++ series tube rectifier.
And are those 7-0-7V supply wires also thick ?
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#3
All no load readings  The wires all seem about the same thickness.  I’ve forgotten what I removed it from.  Used to salvage whatever I could and in most cases kept the original schematic.  This one I can’t remember although I probably have it somewhere in my pages and pages of notes.

The 4v wires are coming out the same side of the transformer as the primary?
Every thing else comes out the other side.  I was thinking maybe pilot light.  


If I figure out how I’ll post a picture


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