Hoffman Amplifiers Tube Amplifier Forum
Amp Stuff => Tube Amp Building - Tweaks - Repairs => Topic started by: jaster55 on July 29, 2025, 03:06:23 pm
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I want remove the PC boards from my 65 deluxe reverb reissue, and install Eyelet boards and small parts from Hoffman...
Can I use existing transformers for this project.
Thanks in advance
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Yes. Duplicate the dual stage filtering on the bias supply shown in the reissue schematic, though.
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Hi Jaster
Ive done a few of these. The Fender DRRI makes a FANTASTIC donor amp. Proved to be very stable rebuilds.As requested by my friends, I've kept the Transformers, Tubes+Sockets and heater wiring, Speaker and reverb tank. Double check all the tubes sockets as I have found "dags" of solder which flowed touching chassis and poor joints in heater wiring. REMOVE C31/R65 and fit s/c! Very unreliable PS section. Fit 47u 600V or 500V F&T Electro, you won't be sorry. Check C33 and C34, be vigilant and replace if req, esp C33.
Good luck and keep us posted
Regards
Mirek
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Thank-you so much... This a big help... Very Encouraging
I'll probably have more questions once I get started
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If you're planning on using full size 3/8" shaft potentiometers all the holes on the faceplate and chassis behind it will have to be enlarged (drilled out). I just left the faceplate on while doing it.
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Thanks... I always use CTS pots