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Tubelab Discussion and support of Tubelab products, prototypes and experiments

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Old 23rd May 2016, 02:32 PM   #1
thewwwall is offline thewwwall  United States
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Join Date: Jan 2013
Default TubeLab SE Power Supply in PSUD2

Hey -

I'm finishing up my first TSE board, I'll attach a pix - but i'm doing this for a 300b build. Right now i have 2 EH 300b's from earlier JE/WALTON build that i'm converting to new guitar chassis/functions so for these 300's I'm trying a stereo using the one Electron BFT1 i bought on sale way back and shelved... anyway, it's a 385-0-385 and when i model the normal TSE power supply spec'd caps, i'm getting way more than 450vdc.

So, to get this into the 380vdc-ish range, my current PSUD2 is saying to use a 1 - 1.2UF cap for C4 - I'm going into a Hammond 193J choke for R4, 150uf 450vdc low ESR electrolytic for C5. 130k for bleeder... so, that low of uF basically or almost makes it a choke loaded PSU? Does this sound about right?

I have decent motor run caps i had planned to use, values 5uF - 50uF 440vac but the only other caps for that value i had on hand are polyesters rated at 630vdc which i could parallel with a .22uf small polyprop rated same... anyway, the 1uf wil be a squeeze, planned to use a motor run on chassis but 5uf is still too much B+? Maybe i'm missing some voltage drop resulting from the bias tap take off, which i'm not quite sure how to model in PSUD2. Anyway, unless anyone chimes in - i'm going to give the 1-1.2uf a try on breadboard next. waiting for the 15000uf's to show up, my 16vdc's i had on hand are too big...

Thanks in advance! ;^)
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