SSLV1.1 builds & fairytales

[Salas]

P.S. I hope that your dummy load is not 75R again like in the -5V. That would mean -200mA demand @ -15V.

[roger57]

Originally Posted by Salas

See if there is continuity between all the Vref series components. If there is, check if one or both Leds there are not correctly oriented. Q203 should be conducting the Iref there, make sure its healthy if all other checks pass.

I have replaced Q203 with no luck.
I traced the Vref chain back from both SENSE (-S and 0) terminals to all components and everything checks out. I made the -15 from the same schematic as the -5, and the same layout. The board should be OK.

[roger57]

Originally Posted by Salas

P.S. I hope that your dummy load is not 75R again like in the -5V. That would mean -200mA demand @ -15V.

Salas,

sometimes the obvious isn't so obvious. That's all it was, wrong load.


Oops. Thanks again

[Salas]

No worries, I do worse all the time. Post a picture of your self made boards shunts at work if able.

[roger57]

Originally Posted by Salas

No worries, I do worse all the time. Post a picture of your self made boards shunts at work if able.

Here's a picture. Excuse the messy boards, haven't cleaned them with flux remover yet. Also, ran out of green LEDs and had to use 1 yellow. As you can see I used a lot of layout space; I don't like components squeezed together.

I haven't listened yet, but confident that they'll "walk the talk". I'm using your HV shunt (PCB from group buy) in the tube stage and it's great compared to the linear I was using before.

Gary

[Salas]

What value are those VISHAY? Polyprop?
What kind of tube stage, line, phono? You mean the SSHV2 reg I guess.

[Salas]

Or some I/V tube stage?

[roger57]

Originally Posted by Salas

Or some I/V tube stage?

It's powering a TDA1541A , and your SSHV2 is powering a single 6SN7 tube stage.
I'm just completing a 4-layer PCB for the DAC and tube stage. Right now they're on separate PCB's while I test and tweak. Now that all components have been finalized, I'll combine boards.

Those are nice caps. 10uF at 500V. Here's a link:

MKP1848S61050JP2C Vishay BC Components | BC2788-ND | DigiKey

[Salas]

500V capacitors on low voltage regs... For the looks?

[roger57]

Originally Posted by Salas

500V capacitors on low voltage regs... For the looks?

yeah, they do like nice, eh?
They were cheaper than boutique caps (under $6 each), they're MKP and they're Vishay. Seems that most film caps in that range are 300V and higher. I thought that in spite of these being a bit bigger and higher in voltage, the "cool" factor won out. You like them?