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Hoffman Princeton Reverb Board Build |
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The Layout Diagram Schematic and BOM for this board are on this page You can ask questions about this board on my forum here I have some YouTube videos of this amp in action here |
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Note that Hoffman boards are not assembled by looking at my builds. I do test builds first and change the designs based on those builds. You assemble Hoffman boards using the documents listed below. The Layout Diagram, Schematic and BOM for this board are on this page |
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| This is the board with the Turret lugs swaged onto the board |
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| The lugs have been laced and soldered I had to modify the board, it was too long to fit into the chassis. I eliminated the 2 x 100 ohm resistors at the right end of the board. The resistors will be installed on the back of the Fender lamp assembly like vintage Fenders |
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| On the back of the board there are 3 jumper wires |
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| The blank Princeton Reverb Chassis with the face panel and parts installed |
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| The buss wire has been soldered down the back of the pots |
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| The rear panel and all the parts have been installed All bolt on parts have been installed Tube sockets, Transformers, Jacks, On/Off Switch, Fuse holder, Filter cap I blocked off the ground switch hole with a hole plug |
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| All bolt on parts have been installed Tube sockets, Transformers, Jacks, On/Off Switch, Fuse holder, Filter cap |
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| Top View: The board has been mounted This is the modifies board with the 2 x 100 ohm resistors removed The new boards will all look like this board |
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| Bottom View |
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| Bottom View |
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| Got a bunch of the infrastructure wiring completed |
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| Cloth wire has been installed from the board to the tube sockets The heater wires have been installed |
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| Cloth wire has been installed from the board to the tube sockets The heater wires have been installed |
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| The components have been installed |
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| The components have been installed |
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| All done and ready to be fired up for the first time |
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| Finished the pot wiring and fired it up Biased the EH 6V6's at 30ma as a general bias current for my first test Plugged it into a Marshal 4x12 cabinet set at 8 ohms It sounds great |
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