Howdy again, all. General question regarding the above. I've got a tube project I'm working on. I'm fleshing out the schematic, and will ultimately be putting this on PCBs. That said, DC-heated tubes is going to be the way to go. Power supply-wise, I had a few things in mind:
1.) Hammond 370CAX (500V B+, 5V @ 2.5A, 6.3V @ 2.0A) as power trafo. I was going to use the 5V secondary for indicator LEDs, and rectify and voltage-double the 6.3V secondary for heaters.
2.) Same trafo as above, only buy a separate, purpose-built trafo just to spit out 12.6V for the heaters. Hammond makes a suitable one for about $20 from Digikey.
Any opinions on which would be the "better" approach? And any good references for the voltage doubler? I have a general understanding of how they work and I've seen them implemented in various circuits, but I'm unsure of the "proper" way of approaching one myself.
1.) Hammond 370CAX (500V B+, 5V @ 2.5A, 6.3V @ 2.0A) as power trafo. I was going to use the 5V secondary for indicator LEDs, and rectify and voltage-double the 6.3V secondary for heaters.
2.) Same trafo as above, only buy a separate, purpose-built trafo just to spit out 12.6V for the heaters. Hammond makes a suitable one for about $20 from Digikey.
Any opinions on which would be the "better" approach? And any good references for the voltage doubler? I have a general understanding of how they work and I've seen them implemented in various circuits, but I'm unsure of the "proper" way of approaching one myself.