• Disclaimer: This Vendor's Forum is a paid-for commercial area. Unlike the rest of diyAudio, the Vendor has complete control of what may or may not be posted in this forum. If you wish to discuss technical matters outside the bounds of what is permitted by the Vendor, please use the non-commercial areas of diyAudio to do so.

TubeLab SE Power Supply in PSUD2

Status
This old topic is closed. If you want to reopen this topic, contact a moderator using the "Report Post" button.
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! ;^)
 

Attachments

  • tube-SE board.jpg
    tube-SE board.jpg
    61.3 KB · Views: 118
Status
This old topic is closed. If you want to reopen this topic, contact a moderator using the "Report Post" button.