Hoffman Amplifiers Tube Amplifier Forum
Amp Stuff => Hoffman Turret and Eyelet Boards => Topic started by: EL34 on July 29, 2014, 01:45:24 pm
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The 5E1-5F1 Champ and 5F2A Princeton have the exact same board layout
So the 5F1 board can make either amp
The only difference is that the 5F2A princeton has a 1ma tone pot, a .0047 and a 500p tone cap, 1 more 22/50v cap and a 33/450v main filter cap instead of a 16/475v
The tone control parts are all on the front panel attached to the pots, so the board layout is the same as the 5F1
The layout Diagram, Schematic and BOMs for the 5F1 and the 5F2A can be found on the library page here
http://el34world.com/schematics.htm (http://el34world.com/schematics.htm)
I built a 5F1 board and took some pictures of the build here
http://el34world.com/Hoffman/5F1ChampBoard.htm (http://el34world.com/Hoffman/5F1ChampBoard.htm)
Layout and Schematic for the 5F1
http://el34world.com/Hoffman/files/Hoffman_5F1.pdf (http://el34world.com/Hoffman/files/Hoffman_5F1.pdf)
5F1 BOM
http://el34world.com/Hoffman/files/Hoffman_5F1_BOM.pdf (http://el34world.com/Hoffman/files/Hoffman_5F1_BOM.pdf)
Layout and Schematic for the 5F2A
http://el34world.com/Hoffman/files/Hoffman_5F2A.pdf (http://el34world.com/Hoffman/files/Hoffman_5F2A.pdf)
5F2A BOM
http://el34world.com/Hoffman/files/Hoffman_5F2A_BOM.pdf (http://el34world.com/Hoffman/files/Hoffman_5F2A_BOM.pdf)
Hoffman Board install instructions (http://el34world.com/Hoffman/instructions.htm)
Hoffman Turret Boards are on this page
http://hoffmanamps.com/MyStore/catalog/TurretBoard.htm (http://hoffmanamps.com/MyStore/catalog/TurretBoard.htm)
Hoffman amps Public parts list page is here
http://hoffmanamps.com/MyStore/catalog/PartsListIndex.htm (http://hoffmanamps.com/MyStore/catalog/PartsListIndex.htm)
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I updated the Layout/Schematic and BOM files and uploaded new copies