filament wiring tube heaters on pcb's

[JoeAlders]

@MarcelvdG:


Thanks for the examples! Absolutely clear to me what the idea is.

 

[JoeAlders]

You can change the 6.3V from "tube" transformers from AC to 6.3V DC quite comfortably. No worries about hum here even with the 6B4G.

Thanks MelbB for supplying the circuit. Will build it as a breadboard and see how it behaves in practice for me.

 

[dhaen]

It's a good idea to put the components on the opposite side to the valves (tubes).
Also remember to add ventilation holes to allow airflow.

 

[trobbins]

Also worth including a hum dinger pot and dc elevation, as you are concerned about ac hum getting in to your signal path.

 

[Johan Potgieter]

For myself also, hard-wired away from the PC board; many advantages. I don't even provide pads for heater socket pins, just big holes for those and no contact with the board.