I am using a regulated power supply based on an LM317 to provide 6.3V DC for heating the filament of a 12AU7 tube.
Currently, I have wired it as follows:
I would appreciate any confirmation or suggestions to improve the connection. Additionally, should I consider anything else to minimize noise or extend tube life?
Currently, I have wired it as follows:
- Pin 4 and Pin 5 together → +6.3V
- Pin 9 → GND (ground of the regulated power supply)
I would appreciate any confirmation or suggestions to improve the connection. Additionally, should I consider anything else to minimize noise or extend tube life?
And polarity could be reversed - doesn't matter. One side of the heater supply should be grounded to prevent common mode noise on the cathode.
Looks good.
However, if strapped for 12Volt then the hum residuals would be reduced and the PSU might be easier to make. All depend
if all tubes can use 12Volt.
However, if strapped for 12Volt then the hum residuals would be reduced and the PSU might be easier to make. All depend
if all tubes can use 12Volt.
rayma said it.
In addition : less currect close to the tube, less losses in the PSU and easier work for the 7812 regulator.
But it all depends on 2 things : 1/ is 15 V AC avaliable from transformer 2/will all tubes be able to use 12Volt
In addition : less currect close to the tube, less losses in the PSU and easier work for the 7812 regulator.
But it all depends on 2 things : 1/ is 15 V AC avaliable from transformer 2/will all tubes be able to use 12Volt