2. amps-preamps
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Help me identify an amp

My father, who recently passed away, was an avid audiophile and very proud of his stereo. I’ve been taking inventory of his gear, and while most things are easy to identify, I can’t find any distinguishing marks on this power amp. Can anyone help me identify it? The power tubes are 8417s. Thank you!
https://imgur.com/a/A2cJAFq

dungen
kr4's avatar
kr4
3,688 posts
 

The ST70 was sold as a kit and also fully assembled.  The tape labels suggest DIY.

The PCB is not a Dyna but may offer a clue.

dungen OP
4 posts
 

While I’m at it, I may as well ask my next question: what is it gonna need to get up and running again? It certainly hasn’t been used since 2012, probably even longer.  I know electrolytics fail with time. Given the usefulness (not to mention sentimental value!) of the gear, I will definitely want to take it to an amp tech for restoration. What should I anticipate needing to do?

srinisr
39 posts
 

The best person to ask would be Will Vincent. Search the name on USAM to see some of his modified amps and to get his contact info.

carlsbad2's avatar
carlsbad2
1,667 posts
 

I'd start by plugging it in and seeing if it makes music.  If it doesn't, the smoke will help you identify the parts that need replacement.

Jerry

dungen OP
4 posts
 

Mystery solved: the PCB says GSI on it; however there appear to be different versions, so I will keep digging around. It’s likely my dad saved the documentation somewhere.

I will look up Will Vincent. Thanks for the recommendation. 

Jerry, thanks for giving me a chuckle. Everything is shoved in different parts of the house ever since Hurricane Sandy. I’ll get around to hooking it up and testing it out one of these visits!

Thanks again to the community  

 

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