Hi...
Sorry for asking this....again. I have searched this forum and tha internet without finding a solid answer so I feel that I need to ask again since I have uncompromising info.
I like DC on the heaters and since I also like SRPP topolgy there is sometimes a need for elevated heater DC
I know how to get this from a voltage divider and a cap. Lets assume that I place this voltage divider at the B+ of lets say 250 volts...
I use a 150k and a 100k resistor and achording to the formula it would give me 100 volts for the "elevation"
Now... I have heard and read that this 100V should be connected to the 0 volts of the heater supply...But also heard that if I do so it would be shorted to ground.... But I have also read that the heater won't draw any current from the elevated heater supply so.... I am getting confused here.
What I would like to know, and surely some other people in the sam situation, is ... Where do I connect my divided 100 volts as in the example? On the 0 volts (ground) or on the positive, 12,6 or 6,3 volts, side of the heater supply?
Sincerely
/John
Sorry for asking this....again. I have searched this forum and tha internet without finding a solid answer so I feel that I need to ask again since I have uncompromising info.
I like DC on the heaters and since I also like SRPP topolgy there is sometimes a need for elevated heater DC
I know how to get this from a voltage divider and a cap. Lets assume that I place this voltage divider at the B+ of lets say 250 volts...
I use a 150k and a 100k resistor and achording to the formula it would give me 100 volts for the "elevation"
Now... I have heard and read that this 100V should be connected to the 0 volts of the heater supply...But also heard that if I do so it would be shorted to ground.... But I have also read that the heater won't draw any current from the elevated heater supply so.... I am getting confused here.
What I would like to know, and surely some other people in the sam situation, is ... Where do I connect my divided 100 volts as in the example? On the 0 volts (ground) or on the positive, 12,6 or 6,3 volts, side of the heater supply?
Sincerely
/John