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    My second ST-70 rebuild

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    richtp

    Posts : 31
    Join date : 2011-11-18
    Location : Sterling MI

    My second ST-70 rebuild

    Post by richtp on Sat Dec 03, 2011 11:04 am

    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.

    richtp

    Posts : 31
    Join date : 2011-11-18
    Location : Sterling MI

    Re: My second ST-70 rebuild

    Post by richtp on Sat Dec 03, 2011 11:24 am

    Stripping down the chassis








    richtp

    Posts : 31
    Join date : 2011-11-18
    Location : Sterling MI

    Re: My second ST-70 rebuild

    Post by richtp on Sun Dec 04, 2011 4:57 am

    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.














    Bob Latino
    Admin

    Posts : 2377
    Join date : 2008-11-26
    Location : Massachusetts

    Re: My second ST-70 rebuild

    Post by Bob Latino on Thu Dec 08, 2011 12:21 pm

    Nice job ... I love seeing Dynaco amps rescued from the scrap heap and redone. When you are done you should post a photo of the completed rebuild right next to the photo of yours below which shows the amp under a heavy layer of dust. Take the photo of the completed rebuild from the same angle as the photo below ...

    Bob



    richtp

    Posts : 31
    Join date : 2011-11-18
    Location : Sterling MI

    Re: My second ST-70 rebuild

    Post by richtp on Thu Nov 27, 2014 4:23 pm

    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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    MontanaWay

    Posts : 767
    Join date : 2014-02-06
    Age : 58
    Location : Cameron, Montana

    Re: My second ST-70 rebuild

    Post by MontanaWay on Thu Nov 27, 2014 9:40 pm

    very nice indeed, great job on the rebuild!

    richtp

    Posts : 31
    Join date : 2011-11-18
    Location : Sterling MI

    Re: My second ST-70 rebuild

    Post by richtp on Sun Nov 30, 2014 12:41 pm

    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.

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