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Hoffman Amps Forum image Author Topic: AO-35 Schematics  (Read 356 times)

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Offline Texson

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AO-35 Schematics
« on: April 24, 2026, 12:36:50 am »
Does anyone know where I can find a list of schematics for the various ao-35 conversions? I'm not sure which conversion I want but would like to check out a few schems while I am deciding.
Never deprive someone of hope. It may be all they have left.

Offline sluckey

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Re: AO-35 Schematics
« Reply #1 on: April 24, 2026, 07:16:59 am »
I doubt you will directly find such a list. Google is your friend. Spend a day surfing google and you can put together an extensive list. Most of the conversions will be based on the Vox AC-15 and Marshall 1974 18 watt.

Lots of Hammond conversions (including AO-35) here...

     https://ampgarage.com/forum/viewtopic.php?f=6&t=24331
« Last Edit: April 24, 2026, 07:41:19 am by sluckey »

Offline Texson

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Re: AO-35 Schematics
« Reply #2 on: April 27, 2026, 12:45:31 am »
Thanks. That's way more than I had.
Never deprive someone of hope. It may be all they have left.

Offline bmccowan

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Re: AO-35 Schematics
« Reply #3 on: April 28, 2026, 08:55:51 am »
As Steve said, Google is your friend, or another search engine if you are anti-Google. You also might try Claude if you are not anti-AI. Everybody is anti-something these days.
Some thoughts about the AO-35. Dr. Z made the original Carmen Ghia from AO-35s. Clones and semi-clone schematics can be found under Charming Ghia and Phoenix Project and other.
Richard Goodsell also based his Goodsell 17 on the AO-35. I have searched for a schematic, without luck, for that amp. Owners love that amp. I have read that the power amp was kept and the preamp is based on the Fender 5F6a. Richard closed his business a while back and has been promising to start a DIY website or YouTube channel as he gets many info requests.
Another amp easily made from AO-35 bones is the Matchless Spitfire.
After toying with converting AO-35s, retaining the original chassis and board. I said F-it and robbed the iron and a few other parts for projects. The chassis and board were too crowded for my old eyes and arthritic fingers. I could get the amps to work but they were always too noisy. The AO-39 is easier to work with.
I have not searched for AO-35 based schematics in a few years, so if you find some interesting stuff - please share.
Mac
“To my surprise, when I opened my eyes, I was the victim of a great compromise.”
John Prine

 


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