DIY Front End 2022

[Nelson Pass]

Greetings.

I present the DIY FRONT END 2022.




EDIT: For current boards marked "V0R1" please find the changes and additional information in post #686 of this thread
https://www.diyaudio.com/community/threads/diy-front-end-2022.394339/page-35#post-7323986

 

[Adams_Leo]

WOW,thanks Pa

 

[Adams_Leo]

does the kit ready?

 

[mgb1965]

Thank you! 👍
I am looking forward for the little power amplifiers projects! I hope I will be able use my pair of Tokin THF-51S with those.🙂

 

[von Ah]

Excellent! Thanks, Nelson! Can’t wait to try this out with some low/no-gain amps.

 

[codyt]

 

[wwwtttwww]

So nice!

 

[Nelson Pass]

The essentials kits are packed up and will ship to the store this week.

 

[codyt]

The flexibility of the circuit is pretty fantastic. I like the option of single rail supply, and the phase inversion trick will be handy for single stage common source amps.

 

[ClaudeG]

Another incredible gift for the community : many thanks Pa!

With this excellent "platform" enabling so many configurations you should be able to walk out safely "for a long time" without having to meet villagers with torches ;-)

 

[Mark Johnson]

The schematic seems to be revised; compare to the version shown in the BAF-2022 video. The biggest surprise, to me anyway, is the disappearance of PNP's emitter resistor. In Nelson's article "DIY Opamps" on his PassDIY site (link), his opamp circuits that used a PNP for the second gain stage, did have a 10 ohm emitter resistor like the one shown in the BAF-2022 video. But now, poof, gone.

_

 

[inyashd]

WOW ,Thank you!

 

[Nelson Pass]

Compensation caps too - Poof! Gone!

 

[ra7]

Nicely!

 

[Zen Mod]

Baaaad Pa!

 

[Aleph5]

Very nice, and simple! Looks like Q3 is set for 2mA; what about for Q4?

 

[twitchie]

It's Christmas again already!!! Thank you Papa!

 

[wwwtttwww]

Mr. Pass, could you tell us the rough current of the first and second stage CCS?

 

[dantwomey]

Another gift from Pa!

 

[Nelson Pass]

A little under 3 ma and 9 ma. Approximate, but not at all critical.