I'm designing a PCB for a tube compressor , the tube filament supply is 6,3AC 1.6A
Initially I thought to make the supply DC , but the power transformer becomes too big.
I have seen many projects where the filaments are wired in twisted pairs off the board, which certainly is a feasible solution, but I have also seen some commercial units that seemingly run the heaters AC on the PCB.
Perhaps if the AC lines are kept on the edge of the board and away from grid circuits it's possible to avoid noise ?
Also heater elevation could help ?
I might just try a prototype pcb but I was wondering if anybody has experience with this
Initially I thought to make the supply DC , but the power transformer becomes too big.
I have seen many projects where the filaments are wired in twisted pairs off the board, which certainly is a feasible solution, but I have also seen some commercial units that seemingly run the heaters AC on the PCB.
Perhaps if the AC lines are kept on the edge of the board and away from grid circuits it's possible to avoid noise ?
Also heater elevation could help ?
I might just try a prototype pcb but I was wondering if anybody has experience with this