First of all some small context: I am attempting to design and build a clock with old electricial components, without silicon components. This question is about the power supply circuit. Note that I have no degree in electronics whatsoever, I have just been learning it as a hobby for a few weeks now.
For my circuit I will use a tube rectifier, e.g. the 6C4P rectifier. I will connect this, after smoothing, to voltage regulator tubes. I've picked the following, as I need the following DC voltage outputs:
- At least 450 V for dekatron anodes;
- Around 170 V for Nixie anodes;
- Negative 150 V for dekatron pulse (I can build this later on, but recommendations are welcome).
After doing some research, I am aware that one can connect voltage regulator tubes in series, to obtain different stable voltage outputs. I've picked the following voltage regulator tubes:
- 2x SG-16P (each around 85 V stabilised voltage, 150 V ignition voltage) = 170 V out
- 2x SG-1P (each around 150 V stabilised voltage, 175 V ignition voltage) = 300 V out
If connecting them in series and counting the output voltages, I should be able to get 170 V and 470 V if I am correct.
Now - if using the full-wave rectifier and a capacitor, what AC R.M.S. full load output voltage transformer should I pick? Do I need to count all the ignition voltages for the voltage regulator tubes as minimal DC input after the rectifier circuit? If so, I come up with the following calculation:
Voltage regulator tubes ignition voltages = (175 + 175 + 150 + 150) = 650 VDC needed after rectification and smoothing.
Currently I don't know the voltage drop of the rectifier tube and voltage regulator tubes, so I will just call them X and Y for now.
If 650 VDC after the rectifier/smoothing is correct, would this mean I need at least a full load AC R.M.S. voltage output of (650 + X + Y) / √2 on the transformer for max. efficiency?