My "Stupendous" PPP 6P1P build

[zintolo]

@Chris Hornbeck
Thank you!!

 

[jcalvarez]

@jcalvarez is there a double triode tube with mu=100 but at least twice as powerful as the 12AX7? First option is parallel both section, but I’m curious to know if there’s another solution.

Thanks!

I'm not aware, I've been looking for one, but so far nothing.

 

[kodabmx]

There is no "western" equivelent...
I can't even find any other tube with the same pinout.
Some people say ECF80 is close but I don't agree based on the datasheets...

 

[jcalvarez]

ECF80 is not remotely close. That's what they usually put on e-Bay, "6F12P (ECF80)".

 

[zintolo]

I think they mean “equivalent” based on the fact that the triode, if used as concertina, can have a mu = 20 without affecting the circuit so much. But they are certainly not.

 

[zintolo]

12BZ7?

I've searched some datasheets, and the curves look uglier than 12AX7, and probably easier to parallel two triodes of a 12AX7.

 

[Bas Horneman]

This size power transformer does not have endbells. So I made this.

 

[Bas Horneman]

PSU and output transformer section taking shape.

 

[Kay Pirinha]

Where's this company called TBT located, please?

Best regards!

 

[Bas Horneman]

Unfortunately they stopped last year. They were based in Troisdorf.

 

[Kay Pirinha]

Thanks, now I see, why I couldn't find them at the WWW 🙁.

Best regards!

 

[Bas Horneman]

back done

 

[Bas Horneman]

 

[Francois G]

😁👍 Good to see some progress!

 

[Bas Horneman]

Yeah...It is starting to itch again. But as usual I want to build SE amps. But then I thought...I have to do this one first.

 

[Bas Horneman]

 

[Lingwendil]

Very clean! Nice Work!

 

[HeyBill]

Will you look at that. Nice work Bas. Your steadfastness is admirable. Bill

 

[kodabmx]

Very nice.
Also nice to see those boards put to use in a build I didn't create!

Koda

 

[Bas Horneman]

Also nice to see those boards put to use in a build I didn't create!

I would not have built it without the boards. Reduces the chance of a mistake by big margins. Also the build in the relatively small package would have been so much easier had I used your phase splitter pcb. O well.