PSUD Help Needed: What value do I enter for current?

[bluegti]

I'm using PSUD to model the power supply for a single ended stereo amp using one triode strapped 6V6 tube per channel.

To make the math simple, assume I want the bias point of each tube to be 250V / 50mA.

Here's my question... when entering the number of amps into PSUD do I enter 50mA or 100mA?



Also, I plan on using the same power supply for my driver section (not sure what that will be yet), but if I want the model to include the driver power requirement, would I insert a current tap?

[boywonder]

Originally Posted by bluegti

I'm using PSUD to model the power supply for a single ended stereo amp using one triode strapped 6V6 tube per channel.

To make the math simple, assume I want the bias point of each tube to be 250V / 50mA.

Here's my question... when entering the number of amps into PSUD do I enter 50mA or 100mA?



Also, I plan on using the same power supply for my driver section (not sure what that will be yet), but if I want the model to include the driver power requirement, would I insert a current tap?

Since it's a stereo amp, use 50ma x 2

Yes, insert a current tap for the 6V6 B+. If you are tapping B+ after C2 (CRC), then add the current tap there and make I1 the current draw of the driver.

If you are planning on CRCRC to get the 6V6 B+, then add your additional RC section(s) and put the current tap after C3

[bluegti]

Thanks for the reply. So is this correct?



A thought occurred to me, what if I was planning on isolating the two channels with an RC section. Sort of a R2' C3' section. Would I still enter 100mA for the current?



Does it make sense to isolate the channels this way?

P.S. I edited the PSUD diagram with Photoshop to make the parallel sections. I don't think you can actually do this with the tool.

[jrenkin]

Just a side question. How did you copy and attach your schematic from
PSUDII? I can't seem to do it and have a question for the forum.

[boywonder]

Originally Posted by jrenkin

Just a side question. How did you copy and attach your schematic from
PSUDII? I can't seem to do it and have a question for the forum.

Do a control/print screen (or control P) and control V to paste it in MS paint, etc. Then save as a JPG or BMP.

[boywonder]

Originally Posted by bluegti

Thanks for the reply. So is this correct?



A thought occurred to me, what if I was planning on isolating the two channels with an RC section. Sort of a R2' C3' section. Would I still enter 100mA for the current?



Does it make sense to isolate the channels this way?

P.S. I edited the PSUD diagram with Photoshop to make the parallel sections. I don't think you can actually do this with the tool.

Nifty photoshop work. Yes the first schematic looks OK (to me at least). You should check for ringing by editing the constant current box and applying a 20ma or so step after 5 seconds or so (some time after the voltages level out). You don't want any overshoot/ringing.

You can certainly parallel the output, you need to adjust the R values in PSUD since you are paralleling R's.

check out post #407 in this thread:

Poll..anyone interested in an Aikido linestage PCB group buy?

[bluegti]

Originally Posted by jrenkin

Just a side question. How did you copy and attach your schematic from
PSUDII? I can't seem to do it and have a question for the forum.

As boywonder said, I press the Alt-Print Screen buttons to capture the Window. Next, I open up a image editing tool (I use Photoshop, but MS Paint will work) and paste (ctrl-V) the image. Next, I save the file as a jpeg or gif and upload it to TinyPic - Free Image Hosting, Photo Sharing & Video Hosting. Once you have it there, they give you the code to use to reference the image in the message board.

[boywonder]

You can also save the image locally on your machine, and upload it directly to the forum. Use the "manage attachments" button, browse to your image and upload.

[jrenkin]

Thanks for the help!