PSU Designer II questions

[deiseldave]

I been playing around with Duncan's PSU2 program, and have a few questions.

1) Should the node voltages read a little higher than what I want to actually hit the tube's plate to account for drops of plate resistors, etc. ?
If so, from your experience, what percentage higher voltage (at a PS node) looks about right to you ?

2) Do you plug in your plate current's & screen currents as "current taps" ?

3) On the final resistor (load), what would be a realistic value for a standard 18 Watt ?

4) Does anyone have a few (known working) PSU2 design files saved that I could use for reference ?

Thanks,

Dave

[morcey2]

I been playing around with Duncan's PSU2 program, and have a few questions.

1) Should the node voltages read a little higher than what I want to actually hit the tube's plate to account for drops of plate resistors, etc. ?
If so, from your experience, what percentage higher voltage (at a PS node) looks about right to you ?

The node voltage you see will be the voltage at the top of the plate resistors.

2) Do you plug in your plate current's & screen currents as "current taps" ?

I do. I usually figure the plate current and make the screen current about 10% of the plate current.

3) On the final resistor (load), what would be a realistic value for a standard 18 Watt ?

I usually do that as current taps also. I figure about 1ma per triode section for 12ax7's, unless something in the design tells me otherwise.

4) Does anyone have a few (known working) PSU2 design files saved that I could use for reference ?

I can. I've got to grab it from work but I've got an 18 watt psu2 file that works dandy. I'll get it as soon as the network there is back up. should be about an hour.



Matt

[deiseldave]

Thanks Matt.

[morcey2]

Here you go. I hope this works.

Matt

[morcey2]

That's the basic supply that I'm building into my current 18watt. I've got the plate and screen current increasing after about 10 seconds to see what type of sag I would get out of the 100ohm resistor.

Matt

[deiseldave]

Thanks again.