How would you simulate just this portion of the power source (from a tube guitar amp). I tried using AC sources into the diodes with 209 VAC 60Hz and 206VAC 60Hz respectively and I don't think I am getting the right results at the test points... any thoughts?
Last edited:
LTSpice's AC sources are specified by peak amplitude so with 209V you'd not get 264VDC, rather a bit under 209VDC due to the diodes' forward voltage drop. The B2 voltage is going to take a long time to reach equilibrium with such a large value as 22k feeding it. How long a time did you sim for (assuming you used transient simulation) ?
The voltages at B1 and B2 depend on the current that is drawn, which is not specified in your schematic. You will have to add a current source to each point, make it an active current source, and set a corresponding mA value.
Same thing in real-life: try building just the part of the circuit you have shown and measure the voltages at HV, B1 and B2. They will all read high and more-or-less the same.
Same thing in real-life: try building just the part of the circuit you have shown and measure the voltages at HV, B1 and B2. They will all read high and more-or-less the same.
Hi. Sorry it took me so long to respond. I am only doing 160ms as you can see below. Here is the LTSpice circuit and the 3 outputs. Am I totally off base with the values for the voltage sources and how long do you think I need to run the sim for?
Like I said, I am just trying to get "close". For the record, I am trying to sim the MOD 102 schematic for a learning exercise.