Hoffman Amplifiers Tube Amplifier Forum
Amp Stuff => Tube Amp Building - Tweaks - Repairs => Topic started by: PetePalumbo on December 12, 2025, 08:22:16 am
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Hello, my Peavey Classic 50 has horrible high pitched ghost notes, and folded circuit boards, pushes parts past ratings etc. If it’s a bad preamp tube I might continue with it, but would you:
1) Repair and sell, build whole new kit.
2) Repurpose the cabinet and speakers to house a Hoffman chassis (assuming faceplate and chassis size issues are solveable.) Sell Classic 50 chassis on eBay with disclosures.
3) Repurpose a Hi Fi stereo tube (6BQ5 power) amp to exactly match target schematic. (Is output transformer “too good” to work? Candidate is Eico HF-32
https://www.electronica-pt.com/images/files/th_45337.jpg
I enjoy using knowledge and creativity to achieve amazing cost/benefit ratio. Excited to interact with those who would save me from the school of hard knocks or re-inventing the wheel.
Pete
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Years ago I bought a hot rod deluxe new .....For some naive reason I assumed it was a hand wired board (1989 or early 90's) I liked the sound and liked the weight as I was gigging. Years later it had a few of the expected failures. By then I had some experience with recapping biasing ect. and I repaired the failure and decided that I did not want to work on anything but point to point or early hand wired boards .....the early boards with heavt traces are OK ....Marshall JCM 800 verticle inputs and such . I sold the repaired HRD to a bandmate and told him it's flaws . That's what I did.
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Yes to 1 or 2. Whatever makes sense to you, but it sounds like you're considering 2 . . . which is probably what I would do.
Excited to interact with those who would save me from the school of hard knocks or re-inventing the wheel.
Happy to have you here! However, anyone who works with guitar amps will be both re-inventing the wheel, and going to the school of hard knocks, sometimes at the same time! And it's all good, all fun, and all electric. :icon_biggrin: