45 Volt DC Power Supply | Electronics Forums - Maker Pro
Mar 16, 2008 · You might consider a switching boost power supply such as LT1268 which can provide a regulated 45 VDC supply from 3 volt batteries, which can also be your filament supply if you drop it down with a diode to 2.3 VDC. The LT1268 is $8 from www.linear.com, but it will be cheaper in the long run
I need some help building a filament power supply
Feb 1, 2017 · I suspect the easiest solution is to use a 5V filament transformer and just connect each tube filament across the 5V winding with an individually selected series resistor. It's not efficient, but the filaments will last a very long time if they're always started up …
Fun With Tubes - 8 Simple Power Supplies. - The Trek BBS
Feb 12, 2007 · The circuits that use a 5Y3 rectifier tube require a transformer with a 5 volt 2 amp winding for the tube's filament. If you can't find or don't have a transformer with a 5 volt winding one of the 6AX5 circuits may be for you.
Filament voltage amperage question - el34world.com
Dec 27, 2022 · According to the datasheet, 12V6GT tube heater filaments draw .225 amps per tube. The datasheet for 6VGT tubes indicate a current dray of .45 amps per tube. The 12AX7 datasheet indicates filament current draw to be .15 amps at 12 volt series operation and .3 amps at 6 volt parallel operation.
5.2 Power supply for the vacuum tube filaments - VTADIY
Here we will discuss only this heating method and we will consider the use AC voltage to supply power to the filaments. Many vacuum tubes require a filament voltage of 6.3V, which can be obtained by connecting the filament to a step-down transformer, as shown in Figure 43 a).
Regulated DC power supply or filament supply - pmillett.com
Basically just add a transformer to get a regulated DC voltage in the 1.25V to ~25V range, at up to 5 amps. You can connect two modules to get a bipolar supply (for opamps, for example) - see below. Here is the schematic (click on the image for a full PDF schematic):
Running tubes' filament on DC - diyAudio
Sep 24, 2015 · A DC power supply only gives 1.414 times the AC RMS input voltage when it isn't loaded, or with a lossless transformer and infinite value smoothing capacitor and zero voltage drop diodes. I think I read somewhere that heaters may last slightly longer on AC, as DC can cause metal migration.
Universal Filament Regulator - Neurochrome
The Universal Filament Regulator is a power supply that features ultra-low output noise. It is intended for powering heaters and filaments in vacuum tube amplifiers but it also serves in other applications where a low-noise power supply is needed.
Using an unused filament winding to buck voltage on power ... - diyAudio
Jun 20, 2023 · The power transformer has three separate filament windings. A 6.3 Volt, which will be used for the 6P15P-EV preamp tubes, a 5 Volt, which will be used for the rectifier tube, and the extra 12.6 Volt winding.
Vacuum Tube Power Supply Design - diyaudioprojects.com
Apr 17, 2016 · Unless your designs are pushing the tubes right to their limits, most tube amplifier circuits operate equally well with power supply variations as large as +/- 20%. For our transformer that means somewhere between 192v and 287v.