The simplistic Salas low voltage shunt regulator

[spartan]

Salas, thanks for the picture. I believe it would be easier if I put it on a picture too.
Here's what I meant (see attachment).
How would I connect, on the one side, the batteries, on the other, the phono stage?

 

[spartan]

attachment

 

[noSmoking]

are boards available

You can still use C105, C205 even if having a smooth battery DC input I mean. It can do good bypassing the battery feed. Your preferred quality 1000uF type will suffice.

Hi Salas,
Can these boards be purchased ?
Thanks,
NS

 

[Salas]

Salas, thanks for the picture. I believe it would be easier if I put it on a picture too.
Here's what I meant (see attachment).
How would I connect, on the one side, the batteries, on the other, the phono stage?

 

[Salas]

Hi Salas,
Can these boards be purchased ?
Thanks,
NS

There was a very recent conclusive GB but it ended. Ask Tea-Bag in case he had ordered any spares.

 

[spartan]

Thanks, Salas. Good thing I have asked you.
Alternatively, would it be ok to use only one battery for both boards with the same phono stage?

 

[Salas]

You mean 2 common batteries for +0- between two channels?

 

[noSmoking]

There was a very recent conclusive GB but it ended. Ask Tea-Bag in case he had ordered any spares.

Hi Salas ,
Thanks for the reply,I found 2 boards or 8 ps boards they are the RED v 1.0 do I need any mods to them or just put them together,I forgot I had them,LOL.
Thanks again,
NS

 

[Salas]

I don't remember them buggy. The 1.1 is better but they will do decently.

 

[spartan]

I meant using just one 36V battery for the whole system, instead of using two (see attachment).

 

[Salas]

I meant using just one 36V battery for the whole system, instead of using two (see attachment).

No

 

[AndrewT]

post6204,
Salas, keep the two 36V battery packs separate.
The Zero Volts connect at the other end.

 

[spartan]

Adrew,
Do you mean this would be better?
Salas, can you confirm?

 

[AndrewT]

Yes.
The right hand ends of the two PSU connect to create the Zero Volts to feed to the DCB1

 

[spartan]

thank you, andrew.

 

[PreSapian]

i accidentally put the op-amp in backwards in a 15+- shunt and the leds only came on for one side. when i corrected the opamp's orientation the circuit operated again but i wonder if something has been damaged. because though i don't know since when, the amp has developed a hum+ channel bleed.

 

[Salas]

Change the op amp first to see if it fixes.

 

[PreSapian]

tried various ones since then but the problem remains...

 

[Salas]

Do other checks then. Use a DMM in AC mV and see if there is ripple in the rails.
If there is, check if something went out. The transistors and Mosfets in the regs must show about 0.6V VBE and about 4V VGS when they are OK.

 

[AndrewT]

The original 741 was designed to tolerate reverse insertion.
I have not seen a comment that any other opamp can match this very valuable damage limitation characteristic.