Hoffman Amplifiers Tube Amplifier Forum
Amp Stuff => Tube Amp Building - Tweaks - Repairs => Topic started by: rockrink on August 31, 2022, 08:25:00 am
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I recently acquired a 1974 Silverface Princeton Reverb that had been significantly changed. The previous owner (R.I.P.) had removed the original board and installed one of this own design. The new configuration has a solid state rectifier and no Trem. I believe the PT is the original. It sounds good (though the reverb section is noisy) but I am leaning toward returning the amp to something closer to its original construction.
I am looking for opinions. Does my contemplated project make sense or am I better off just leaving the working amp alone? This would not be my first build.
Thanks all.
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a schematic as it currently lives might help
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I would read through this first:
https://el34world.com/schematics.htm#Hoffman_Princeton_Reverb_
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a schematic as it currently lives might help
I have not traced it out yet and the builder is now deceased.
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I would read through this first:
https://el34world.com/schematics.htm#Hoffman_Princeton_Reverb_
This would be my choice. The Hoffman PR is true to the original circuit, but it also includes an adjustable bias circuit.
However, if you want the original look visit the Eyelet Board Order Page (https://hoffmanamps.com/MyStore/perlshop.cgi?ACTION=enter&thispage=EyeletBoard.htm&ORDER_ID=!ORDERID!) and get the Princeton Reverb eyelet board and the Bias Board 1.
a schematic as it currently lives might help
I have not traced it out yet and the builder is now deceased.
No need to bother tracing the as is circuit if you're gonna replace the board(s).