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In Reply to: RE: Half Wave Rectifier posted by timp on September 16, 2012 at 16:36:33
TRY to "input" into PSUD2 what is really going on, to the best of your knowledge.
Insert a current tap before R2 and assign 150 mA. as its value.
Change the current tap at the end of the filter to 50 mA. OR better yet, add current taps after R2 and R3 to accurately reflect actual current draws, at different locations along the filter.
If 83 Ohms is the DCR across the entire winding, use half of that ( 42 Ohms) as a ROUGH input figure in PSUD, which will be ( not exact but ) an improvement over the 20 Ohms and 83 Ohms you have inputed.
Follow Ups:
Hi Jeff
Thanks for helping me. I am extremely thankful. And I learned a lot in the process. I am still confused... I just read voltage on the plate and it says 377.
Somehow, Duncan's PSU says that the reading on C2 is 350ish. So, I may be doing something wrong?
To add more info,
I am using 2 12sn7gt as phase inverter
and 1 12sl7gt as a premp section.
Then 4 6bg6gs as power tubes.
In short, looking at my PSU, do you see any problem using it for a pp amp?
Thanks.
Tim,
That PSUD2 simulation above looks mighty fine to me, and WOW, you have come a long way on this in a very short time.
I would NOT worry about the difference in VDCs of 27 VDC on a 350 VDC supply, that is less than 10%. Is 377 VDC what you wanted ?
What you did is totally opposite of how I would approach the filter to the finals. See my NEW post above, " Pinging ...timp."
Cheers,
Jeff
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