Building a symmetrical psu B1 buffer

[Salas]

If a total preamplifier concept, with relay input switching, muting, control circuit psu etc. is the thing that understandably many people need, why not make it as a modules accepting motherboard. So someone can add a lightspeed volume, or a normal volume of several pot quality and size, or a different line stage with some gain just because it is needed in a certain system. Or just because something new came along and want to check it out. Space to play in other words. It could be made so to accept the current Crt B1 module with pins instead of short cable even. Anyway, for those that the current module is all they need as a one input standalone or a part of a wired up preamp with several inputs, switches, and everything, you can email me to send you the full files, to personally make or offer in a group buy even.

[Ryssen]

The current verision is enough for me.

2 leds. If the PCB had the extra pads for that. By using one led position for a Zener it scales higher more practically.

Would be nice.

[schro20]

Originally posted by jean-paul
I would like to see a complete solution including muting, volume potentiometer etc
Just a question: do you want such a PCB?

Yes!

May I suggest that the board contain multiple differently spaced holes for the big caps? That way individual people can try their favorite caps more easily.

Peter

[mac1963]

Salas

Greetings from a new guy.
I agree with the modular approach. While personally I would aim for the 'full monty', I think that it would be a monumental task to satisfy everyone as to the 'perfect' solution to input selection, volume control, gain/no gain, etc. Each one of these topics could well give rise to extensive forum topics on their own.
It would be great to get the full pics online from you, as this forum does not allow new guys to email the other members before 'burning in' with a few posts of our own.
Keep up the good (and interesting) work, guys.

[korben69]

My contribution to the topic.
Please tell me what is correct or not.
For the metal film R, I've suggested only .25W values, maye it's not enough...
Let me know, I'll post new versions.

Thanks for the great job !

[Salas]

Originally posted by mac1963
as this forum does not allow new guys to email the other members before 'burning in' with a few posts of our own.

I have mailed you.

Originally posted by korben69
Please tell me what is correct or not.

The BOM is correct. Thanks.

[ANADIGIT]

I have interested project as same as this topic.
Fully symetric power supply from CODA CLX.

Also buffer stage gain=1

http://www.diyaudio.com/forums/showt...31#post1868531

Thanks
Anadigit

[jean-paul]

That looks nice but I would advise to open a separate thread on that subject in order not to make confusion on the symmetrical B1 larger than it already is

[bakpaosiomay]

Originally posted by Salas


Green.

No, because you will need too many, the pads on the pcb aren't enough, and the noise will go up.

No special tips. Just use top quality 220R resistors.

Yes you can, but better keep it a TO-240 case if you want to avoid sinks.

salas do you mind send me the eagle files?

because i think i gonna make my own pcb at home.

thanks.

[Salas]

OK, you got mail.