Transformer Help

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Major Sparky
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Transformer Help

Post by Major Sparky » Wed Nov 21, 2012 10:27 am

Hey, I'm looking for a power transformer for a matchless clone I'm building. Would this power transformer work with this layout?

http://www.tubesandmore.com/products/P-T270HX" onclick="window.open(this.href);return false;

http://www.ceriatone.com/images/layoutP ... iatone.jpg" onclick="window.open(this.href);return false;

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neikeel
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Re: Transformer Help

Post by neikeel » Wed Nov 21, 2012 1:04 pm

In most respects it looks ok although the voltage it delivers is a little lower (275/0/275 vs 290/0/290 specced). The heater taps for the rectifier and rest looks up to scratch. You may end up with a little less clean headroom.
Neil

Major Sparky
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Re: Transformer Help

Post by Major Sparky » Wed Nov 21, 2012 2:57 pm

I can deal with the loss of headroom. I'm just confused about how the wires match up to the layout. I can see the 275 0 275 match up, as well as the 120v and 3.15 wires match up but not the rest. Can you help me out here?

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neikeel
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Re: Transformer Help

Post by neikeel » Wed Nov 21, 2012 5:23 pm

You have 0 - 115 -125 primary inputs

On secondaries 0-5v for GZ 34 heaters (do not use centre tap)

3.15 - 0 -3.15 other heaters (centre tap to ground)

275 - 0 - 275 secondaries to rectifier

earth
Neil

mark enger
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Re: Transformer Help

Post by mark enger » Sat Nov 24, 2012 10:35 pm

That one will work, GDS offers a 36watt pt thats 290-0-290 there heyboer, edcore would have something also
they have some real great prices but there like a 3 or 4 week wait i guess they wind to order there also westlab you could call they may have a exact pt, good luck mark

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