Nice Eico ST70 power transformer

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Nice Eico ST70 power transformer

Postby danf » Mon May 20, 2013 6:12 am

This is a nice EICO ST70 power transformer, nominally 360-0-360 VAC at 300 mA, one 5V at 2 A winding, two 6.3 V windings at ~3.5 A each, and a 80V bias tap. The transformer came out of a working amp and tests good. The transformer was cleaned and sprayed flat black for the body and gloss black for the cover.
This is much beefier than the stock Dynaco ST-70 transformer. Plenty of power for a stereo amp producing ~35W per channel.

For transformer specialists the primary resistance is 0.98 ohms, and the HV winding is 46 ohms (across the full winding). The turns ratio is 6.32. The transformer will produce about about 460 VDC with the specified GZ34 and 480 VDC with SS full wave rectification.

Asking $85 shipped priority mail to continental US. The transformer weighs 10 lbs and is about 3.5 by 4 by 4.5 inches.

Note: revised specifications (Don't trust SAMS!)

Make an offer or will trade for good 600VCT power transformer producing at least 180 ma.

Best,
Dan
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Last edited by danf on Tue Aug 20, 2013 4:24 am, edited 7 times in total.
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Re: Nice Eico ST70 power transformer

Postby rsumperl » Sun Jun 09, 2013 2:22 pm

Good afternoon,
Is this transformer still available?

Thanks,
Ray
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Re: Nice Eico ST70 power transformer

Postby danf » Tue Jun 11, 2013 5:53 am

Yes, this transformer is still available.

Best,
Dan
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Posts: 49
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Re: Nice Eico ST70 power transformer

Postby rsumperl » Tue Jun 11, 2013 7:49 am

If you take paypal, please send your email address and I will get a paypal done
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Re: Nice Eico ST70 power transformer

Postby danf » Tue Jun 11, 2013 10:07 am

Hi Ray,

I sent PM - post here if you don't find it.

Best,
Dan
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Re: Nice Eico ST70 power transformer

Postby danf » Fri Jun 14, 2013 5:40 am

The transformer is still available. Note revised specifications (SAMS was way off on current capacity). This is much larger than a stock Dynaco ST-70 transformer.
danf
 
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Re: Nice Eico ST70 power transformer

Postby jgf » Sun Jun 30, 2013 2:17 pm

PM sent.
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Re: Nice Eico ST70 power transformer

Postby danf » Mon Jul 01, 2013 6:00 pm

Still available
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Re: Nice Eico ST70 power transformer

Postby danf » Sat Aug 17, 2013 3:57 pm

Will trade for a 600VCT at 180 ma (or higher) transformer.
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