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    Building, troubleshooting and testing of these amplifiers should only be
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Aikido tube choice

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dave dove said:
if the 6H6pi you refer to
is a 6n6p
then 6n1p position 1
and 6n6p position 2
sounds very good
you can sub 12au7 or 5687
in position 2

dave

Hi Dave,

I'm going to build Aikido with 6N1P>6N6P.

Would you please to share all values of resistors that successed with your amp?

R2, R4 =?
R15=?
R16=?
R8, R11 =?

Thank you in advance,
Bebong.
 
I have another (probably very 'noobe' -ish) question [apologies]:

How critical is it that the tubes within the Aikido circuit proper are the same?

e.g. If I wanted to use 7193/2C22's in a balanced Aikido line stage, I'd have 8 tubes, meaning 16 top-cap cables :bigeyes: -- which strikes me as a bit of a mess to wire up without mistakes. Could I replace a quad of those with an electrically similar tube type like the 6/12SN7 ??
 
grubyhalo said:
Hi,
Any thoughts/comments on what family of tubes would be better suited on the Aikido if it has to drive an F5 clone? Thanks in advance.
Cheers!


Do you know how much gain you need? Broskie has tables at the end of the user manual here:

For nine pin tubes:

http://www.tubecad.com/Nine-Pin_Aikido_PCB.pdf

For Octal tubes:

http://www.tubecad.com/Octal_Aikido_PCB.pdf

These tables list gain, output impedance, etc. for a given B+ and R values. The gain of the Aikido is roughly half the mu of the first tube, so pick an input tube to get the gain that you need and pick an output tube for low Zout that will play together well for a given B+
 
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