C12 with 6S6B-v triode, we are launching the project.

[Papa Tango Charly]

Hello, Here is my new schematic for C12 with a 6S6B-V i will probably use the original Apex 460 transformer + capsule C12 "CTS3 omni from taskar".sold buy Vami.
Tbone Black PSU.
Do you have any suggestions, or advises?
I was wondering if C4 1uf would be a good choice for the 6S6B-V
Thank you all for your cooperation!

 

[Drosselmeier]

R9 = 10 K

 

[Khron]

And you might want to add a 100n or so from the R4/R5/R6 node to ground.

PS. Looks way more like a 251 schematic than a C12, between the self-bias and the 100p coming off the plate.

PS2. And who is this "we" that are "launching the project"?

 

[Papa Tango Charly]

Hello guys thank you for your help I have 3 x 6S6B- V we are building 2 mics with a good friend in the old Apex 460 body’s We are about to build the pcb.

R9 = 10 K

Is 10k the original value? Not 10M? what will it change. TK best

And you might want to add a 100n or so from the R4/R5/R6 node to ground.

What will it change can you show where to place it. TK best

 

[Khron]

can you show where to place it.

from the R4/R5/R6 node to ground.

How much clearer of a description do you need? Or if even that's not clear enough, should you even be poking around dangerous-voltage circuits in the first place?

Is 10k the original value? Not 10M? what will it change.

Well, 10 MEGOHMS in series with the tube supply won't leave any voltage for the tube. Ohm's law, anyone? How did you arrive at that value, anyway?

 

[Papa Tango Charly]

How much clearer of a description do you need? Or if even that's not clear enough, should you even be poking around dangerous-voltage circuits in the first place?

Thank you for your concern Khron. That’s why I’m not doing it alone my friend is an engineer .
So the 100nf should be place after R6 before the ground right? Does the value of the condo has a impact on the sound. i can't see this condo on the original Schematic.

Well, 10 MEGOHMS in series with the tube supply won't leave any voltage for the tube. Ohm's law, anyone? How did you arrive at that value, anyway?

thank you

We are about to build the PCB there might be some mistake we need somme help.

 

[Khron]

We have made our schematic base on this schematic that uses a 6072A.

Ok, i see an R10 there, but with no value. How did you decide that should be 10 megohms?

And what makes that a "C12" (as i've already asked)?

So the 100nf should be place after R6 before the ground right?

How about putting that on the schematic you already have, to minimize the chance of verbal misunderstandings?

 

[Papa Tango Charly]

OK i Will do That.
This is the only Selfbias C12 version i found on internet. i can build it with a simple Tbone PSU. That why i choose this schematic. Thank you

 

[Khron]

This is the only Selfbias C12 version i found on internet.

Then "technically" it's not a "C12", is it? Maybe C12A, but without a nuvistor... That, plus that 100pF between plate and ground is why i said

PS. Looks way more like a 251 schematic than a C12, between the self-bias and the 100p coming off the plate.

Kinda like putting a Ferrari engine into a Jaguar and calling it a Chevrolet Corvette... It's still good, sure, but definitely not what it says "on the label"