My second ST-70 rebuild

Here is my second Dynaco ST-70 that I picked up a few weeks ago. I am going to do a rebuild on it.








Here it is with the cover off. It had about 1/4" of dust on it!









Here's a pic next to my othe ST-70 before I stripped it down to the chassis





I stripped it down to the Chassis and cleaned off all the rust and corrosion and I am painting the transformers now.

Stripping down the chassis

The Chassis cleaned up better than I had thought. I planned on powder coating it but I think I will use it as is. It still has some pitting.

Finally assembled the ST-70 after 3 years of it sitting on the shelf. I have yet to do any testing or plug it in. With luck I should be testing it tomorrow!


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very nice indeed, great job on the rebuild!

Thanks! It was a lot of fun! I am very happy with how it turned out! Sounds great! It's the first Tubes 4 HiFi driver board I have tried. I put some Russian PIO caps in it as well. Haven't had much opportunity to play it yet but I am very happy with it.

I wanted to replace the chassis because of pitting on the top. I polished it up good but the pitting just returned. I tried polishing it and clear coating it but it looked pretty bad. I ended up painting the top with a brown hammered paint. Didn't think I'd like that, but I think it looks pretty cool. I hope to build a wood base out of mahogany at some point as well.

Still running strong after 8 years! Thinking about making some changes though.

Hey, man; That is one more cool job. Nice going. But we all have to ask: what's in the glass in your 2cd post?? Happy New Year. Dale

Haha, I honestly don’t remember what was in the glass! Must have been good, I emptied it. Happy new year.

More pics of what I’m running right now.