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In Reply to: 12AU7 as a buffer - suggestion of brand/model. posted by beppe61 on February 13, 2007 at 23:42:41:
Hi ,
If it's just for a buffer a higher transconductance , higher mu valve such as 12AT7 , 5965 or E80CC should be a much better option to a 12AU7cheers
Follow Ups:
Thanks a lot Sir.
Are they perfectly equivalent to a 12au7 ?
I am not able to mod the circuit I am afraid.
Kind regards,
Hi ,
Not a perfect equivalent but the same pinout and worth a try . 5965 is probably a good start as these are very cheap . Good luck :)ps 6211 is another
cheers
Thank you very much Sir.
Please excuse me again but, from a safety point of view, I should not have any problem I hope.
I mean, no flames no tube burn-out etc.
I am very ignorant in the field.
Do you think that the sound out of a 5965 or a ps6211 tube could be characterized as energetic, aggressive ?
My present tube is too soft and flat.
I like a more aggressive sound even if this could imply some loss in musicality.Thank you very much indeed.
Kind regards,beppe
Hi ,
I very much doubt there will be any flames . Have you consulted the manufacturer of this unit regarding the use of alternate valves ? I am not too familiar with the sonics of 5965 or 6211 unfortunatelycheers
Thank you very much Sir.
I will look for those tubes then.Kindest regards,
I agree but don't you think the circuit will need some re-working assuming it was designed for a 12au7?Tre'
Have Fun and Enjoy the Music
"Still Working the Problem"
Hi ,
It worked with a 12AX7 so should be ok with the suggested valves which are a lot closer in specs .cheers
Both of the first two are available in the EU. They are pretty nice-sounding tubes. See: http://www.artsandmedia.com/5965.html for more info on these tubes.
Please excuse me Sir.
Are the mentioned tubes perfectly equivalent to a 12au7 ?
I understand that I was stressing the 12ax7 tube, that is not equivalent.
By the way, what a bass !Kind regards,
But as fatbottle pointed out that might not matter if it is just a buffer. I just gave you a wider range of tubes to try than he did - all of which are higher mu.
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