Super Symmetric Cork Sniffers' PI

VacuumVoodoo · Post by **VacuumVoodoo** » Wed May 15, 2013 6:27 pm

Just fooling around with Spicy SW. It runs on 12AX7/ECC83 family.
Hope someone may like it enough to give it a go.

Blackburn · Post by **Blackburn** » Wed May 15, 2013 6:35 pm

Will you provide the mescaline?

VacuumVoodoo · Post by **VacuumVoodoo** » Wed May 15, 2013 8:42 pm

Blackburn wrote:
Will you provide the mescaline?

I'm counting on you

Blackburn · Post by **Blackburn** » Wed May 15, 2013 8:56 pm

You got it!

Been reading much about differential pair design the last half hour. Trying to figure best values for a circuit I've made using the 6SL7. 82K plate resistors with a supply of around 275v. I think I know what I'll do with the tail, but I don't know about the bias resistor specifically.

VacuumVoodoo · Post by **VacuumVoodoo** » Wed May 15, 2013 9:10 pm

Have a go: LTPI with 6SL7 step by step design tutorial courtesy Mr. Randall Aiken: http://www.aikenamps.com/LongTailPairDesign.htm

Blackburn · Post by **Blackburn** » Wed May 15, 2013 9:13 pm

Yeah, I read that. Guess I can start with his values, as mine are similar, and go from there.

Interesting file you got there.

VacuumVoodoo · Post by **VacuumVoodoo** » Fri May 17, 2013 6:50 am

Hmmm...170+ views, 65+ downloads. No questions

Reeltarded · Post by **Reeltarded** » Fri May 17, 2013 7:08 am

Can I bypass it with a B+ lift?

I looked at it for an hour but I can't read schematics. Will it work in a pedal enclosure?

JazzGuitarGimp · Post by **JazzGuitarGimp** » Fri May 17, 2013 7:57 am

Reeltarded wrote:Can I bypass it with a B+ lift?

I looked at it for an hour but I can't read schematics. Will it work in a pedal enclosure?

Pedal enclosure is good.... It's small enough that you should be able to your tongue across all the important points.

Reeltarded · Post by **Reeltarded** » Fri May 17, 2013 8:29 am

I lost part of my tongue in a scalding accident. This is very good news. I iwll try it out when I get the casts off, unless you think I could assemble it without arms?

Long story.

Post by **Colossal** » Fri May 17, 2013 11:23 am

Reeltarded wrote:I lost part of my tongue in a scalding accident. This is very good news. I iwll try it out when I get the casts off, unless you think I could assemble it without arms?

Long story.

Did any of this involve a blinding flash of blue/white light and the taste of bacon??

Very cool design on the paraPI Aleksander!

M Fowler · Post by **M Fowler** » Fri May 17, 2013 1:22 pm

VacuumVoodoo wrote:Have a go: LTPI with 6SL7 step by step design tutorial courtesy Mr. Randall Aiken: http://www.aikenamps.com/LongTailPairDesign.htm

I had run across Aiken's info and built this LTP PI in my 5b6 project.

Mark

Structo · Post by **Structo** » Fri May 17, 2013 1:37 pm

Is 6SL7 a vacuum tube?

David Root · Post by **David Root** » Fri May 17, 2013 4:44 pm

Is the pope Argentinian?

Alex's design looks so odd I didn't know where to start.....I need a play by play description of how it works. V1 appears to show 350V to ground??? Where is V1? V2 is the PI input but where is V2? I don't get it at all.

roberto · Post by **roberto** » Fri May 17, 2013 6:59 pm

Just seen this thread, thank you Aleksander!

A few questions that comes into my mind:
- why C2 is 3,3 times bigger than C1 (while load is the same)?
- why R11 is 4,3 times bigger than R10 (while miller cap seems the same)?

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Super Symmetric Cork Sniffers' PI

Super Symmetric Cork Sniffers' PI

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