u/Interesting_Dirt7269

Have four tubes each with 2.5v heaters. I have 2.5VCT and 10VCT transformers both with sufficient current ratings. For aesthetic reasons, I'd like to use the 10VCT and wire the heaters in series. I don't see where this would be an issue, and may even be better since I'm running one wire circumnavigating the chassis. For size constraints the PSU is on a separate chassis. I'm assuming either way I ground the center tap. TIA

Came across this schematic on a quick search for 2A5 circuits and it seems easy enough. After some input at DIYAudio, I edited the original. I plan to use a bluetooth receiver with it. Anyone see anything that doesn't make sense or won't work? The PSU board I'm referring to is one from eBay, 100-380/300mA DC and a 78xx regaulted filament supply, with the words Magic Eye and Nixie.

https://preview.redd.it/ojscqf36khfh1.png?width=1942&format=png&auto=webp&s=270cdcf08d2c858a765616dda15de05e611459c6

Came across this schematic on a quick search for 2A5 circuits and it seems easy enough. After some input at DIYAudio, I edited the original. I plan to use a bluetooth receiver with it. Anyone see anything that doesn't make sense or won't work? The PSU board I'm referring to is one from eBay https://www.ebay.com/itm/285734692836

https://preview.redd.it/ojscqf36khfh1.png?width=1942&format=png&auto=webp&s=270cdcf08d2c858a765616dda15de05e611459c6

I have bunch of 6BE6. I did come across a voltage controlled volume control. https://www.wa2ise.com/netcom/6BE6%20volume%20control.html but requires between -14 to -75v on the grid #3.

I have bunch of 6BE6. I did come across a voltage controlled volume control. https://www.wa2ise.com/netcom/6BE6%20volume%20control.html but requires between -14 to -75v on the grid #3.

I picked up a transformer with basically 4:1 step up. Surplus place said it was designed for a 500v primary. The manufacturer won't release the specs as it's "propreitary to the OEM." I figure with a nominal 117v primary I'll get around 500v unloaded. Add a full wave bridge and I'm around 700 unloaded. The only filtering I can see would be a choke? for something like 807s 811As that can handle that high a B+, is a single resistor-choke acceptable somewhere between 7-14H?