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I own 2 AcousTech phono pre's that were design and manufactured by Ron Sutherland. Unfortunately both have developed some issues and need repair. I have reached out to Ron but have not heard back yet. Yes, sometimes he is a bit slow to respond but he is always a gentleman and very helpful.
What I am looking for are the schematics for these pieces. If you have used these, or currently own one, then you understand why I want to keep these running and in use. They are terrific phono pre's.
If you have a copy and would share it with me I would be greatly appreciative.
Thank you!
Follow Ups:
Hi, raya,I had my AcousTech PH-1P rebuilt (upgraded opamps, new caps) by Sutherland Engineering and it sounds better than new. Ron directed me to his main electronics guy and he was able to source parts and get the job done surprisingly fast. I can send you his email address via your AudioAsylum email if you'd like. I don't think he'd mind and he might be able to send you a schematic.
Tom
Edits: 06/09/22 06/09/22
Awesome. Send it to ackermanr@gjrmail.com
Thank you!
You're welcome. I sent you his Sutherland Engineering email address.
Good luck!
Tom
Looking at pics of the guts of these AcousTech phono stages, they look exceedingly simple with a multiple repeated RC filter and op amps.
My first thought is what could possibly go wrong with such a simple circuit? They should really last almost forever.
Is the P(Premium) a different animal?
P is upgraded transformers and pure copper traces.
Yes, it is laid our fabulously and basically a dual mono design. I can roll any resistor value I want for perfect match with cartridge.
Components do go. So, with one it sounds like a cap that is spitting. The other has a diode and trace go. It is hard to read the values on some of the components.
Anyway, I have a friend who is an EE and helping with this. Schematics always help and a good thing.
You must have electrical phenomena happening. The higher the voltage, the more that can go wrong. Low voltage stuff should be bulletproof. Motors sometimes need to be current limited, but there are no motors in a phono stage other than in the cartridge!
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