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03-29-2026, 07:55 PM
Hi Guys
The heater load in the TUT3 Custom Special is fine for the specified PT. No worries.
The standard Hammond PT and OT are the same as the custom-labelled units used in the Yorkville Sound amps.
As far as DC-ing the preamp tube heaters, you really want more than a 6Vac winding to produce 6Vdc. And actually, if you are intent on DC-ing, use the 12V wiring and then you can use a 12Vac PT, bridge and simple discrete regulator. The 12V wiring (AC or DC) allows all of the audio wiring to never have to cross the heater wiring, provided the sockets are turned the correct way.
Since you have TUT3, note that the DC-stand-off provides the same hum-reduction from heater-line-bourne noise as does a regulator.
Have fun
The heater load in the TUT3 Custom Special is fine for the specified PT. No worries.
The standard Hammond PT and OT are the same as the custom-labelled units used in the Yorkville Sound amps.
As far as DC-ing the preamp tube heaters, you really want more than a 6Vac winding to produce 6Vdc. And actually, if you are intent on DC-ing, use the 12V wiring and then you can use a 12Vac PT, bridge and simple discrete regulator. The 12V wiring (AC or DC) allows all of the audio wiring to never have to cross the heater wiring, provided the sockets are turned the correct way.
Since you have TUT3, note that the DC-stand-off provides the same hum-reduction from heater-line-bourne noise as does a regulator.
Have fun
