So I'm designing this power supply for a tube amp and have a dedicated PT to supply the power tube screens and the preamp tubes. Adding it up I should get ~110 ma at full tilt and about half that at idle.
Using 2 0D3s in series and starting with 380vdc, looking to get 300vdc regulated.
The question comes with the dropping resistor. By my calcs, ~700 ohms is needed to pull all 110ma down to 300vdc. Do I want to pull all of it here or should I lighten up the resistance *lean* on the regulator a bit? Hard to find good examples of this on the web: bit of a lost art.
Thanks in advance.
Using 2 0D3s in series and starting with 380vdc, looking to get 300vdc regulated.
The question comes with the dropping resistor. By my calcs, ~700 ohms is needed to pull all 110ma down to 300vdc. Do I want to pull all of it here or should I lighten up the resistance *lean* on the regulator a bit? Hard to find good examples of this on the web: bit of a lost art.
Thanks in advance.