ST70 chassis with random transformers

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ST70 chassis with random transformers

Postby Blair » Fri Aug 14, 2015 9:15 am

This is a butchered ST70 I bought a while ago in case I got a restoration beyond repair. The chassis is in pretty good condition with intact lettering and I think it would clean up fine. It looks like the person that installed these other transformers intended to do minimally invasive surgery on it because the cutting that was done is around the output transformers and he did it in the rear area. I think a standard A470 would really cover almost all of it. Unknown power and output transformers. The PT comes back with an Eico number to a color TV. It is very robust and would be great for another project. I cannot identify the outputs at all, but they were used with 6l6, so I assume they are 6.6K pri. it might not be easily seen in the images, but the bottom cover is also included with this amp. It is not functional because I was starting to tear it down when I realized that I have too much going on already with about five amps in my office.

Asking $150obo plus shipping.

Thanks!
Attachments
ST704.JPG
ST704.JPG (99.96 KiB) Viewed 2472 times
ST703.JPG
ST703.JPG (103.15 KiB) Viewed 2472 times
ST702.JPG
ST702.JPG (109.82 KiB) Viewed 2472 times
ST701.JPG
ST701.JPG (115 KiB) Viewed 2472 times
Blair
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Re: ST70 chassis with random transformers

Postby Blair » Fri Aug 14, 2015 1:44 pm

Fired up the power transformer to see what I got. 166V unloaded. I assume that will be around 150V loaded, so doubler to get ~400VDC.

Al also assessed my need for space. How about $120 shipped in CONUS.
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Re: ST70 chassis with random transformers

Postby DeathRex » Sun Aug 16, 2015 6:47 am

Are those output transformers the same?
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Re: ST70 chassis with random transformers

Postby Blair » Sun Aug 16, 2015 8:10 am

Hi,

Yes, they ohm the same. If you like, I can take a few images with my meter on them. They are also built identically with the same materials. They have a single secondary, but I am unsure of the impedance.

Also, this is an OBO deal. I need to get gear out of my office.

Thanks!
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Re: ST70 chassis with random transformers

Postby DeathRex » Sun Aug 16, 2015 9:08 am

That left one in the ST703 picture looks taller, might be an optical allusion. Are their measurements the same? Can you give me the dimensions of the outputs?
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Re: ST70 chassis with random transformers

Postby Blair » Sun Aug 16, 2015 9:32 am

Good eye! It's in my possession and I didn't see that. The left one is about 1mm taller. They both measure .8ohms on the secondary, and within 2 ohm'd of each other on the primaries across the whole winding.
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Re: ST70 chassis with random transformers

Postby DeathRex » Sun Aug 16, 2015 10:05 am

Just one more question, so they are about 3" X 4" X 3 1/2" or so?
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Re: ST70 chassis with random transformers

Postby Blair » Sun Aug 16, 2015 10:15 am

3 3/4 X 3 1/8 X ~3" (including the top bell)
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Re: ST70 chassis with random transformers

Postby DeathRex » Sun Aug 16, 2015 10:22 am

OK I'll take it Blair. Is paypal OK?
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Re: ST70 chassis with random transformers

Postby Blair » Sun Aug 16, 2015 10:44 am

PM sent.
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