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Survey: Aikido distortion
Survey: Aikido distortion
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Old 27th February 2006, 11:40 PM   #1
SY is offline SY  United States
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Survey: Aikido distortion
Default Survey: Aikido distortion

I'm curious if anyone who's built an Aikido has done any distortion measurements, especially harmonic distribution. Some circuit particulars, too, please.
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Old 28th February 2006, 03:17 AM   #2
SY is offline SY  United States
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My goodness, all that interest, all those boards, all those builders, and nobody has put the thing on the bench???
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Old 28th February 2006, 06:30 AM   #3
Andypairo is offline Andypairo  Italy
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One should have a suitable bench ;-)

Me not, at least for the moment.

Cheers

Andrea
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Old 28th February 2006, 09:21 AM   #4
Tubes4e4 is offline Tubes4e4  Germany
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Hi SY,

Quote:
Originally posted by SY
My goodness, all that interest, all those boards, all those builders...
That was yesterday. Like with all fashions, yesterday means yesteryear.

What might be the next fashion? Maybe using pentodes as pentodes in small signal circuits? Oh, what a truly shocking alta moda that would be

Yawning, Tom
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Old 28th February 2006, 10:25 AM   #5
Bas Horneman is offline Bas Horneman  Netherlands
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Quote:
My goodness, all that interest, all those boards, all those builders, and nobody has put the thing on the bench???
If people knew how to do proper distortion measurements. They would not be ordering boards but would do point to point. The boards just make it that much easier (and neater).

The only distortion measurements I know of are on John Broskie's site.

http://www.tubecad.com/2005/January/blog0032.htm
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Old 28th February 2006, 10:38 AM   #6
Gluca is offline Gluca  Italy
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OK measurements are measurements ... maybe some O/Scope shots ...

Or just listening impressions ... do ya prefer it or the now-classical-outoffashion CF/SRPP/etc... ?

Ciao
Gianluca
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Old 28th February 2006, 11:09 AM   #7
maynardg is offline maynardg  United States
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Mine is P-to-P, 220V B+ circuit in Blog 30. 6CG7 into 5687. CLCRCRC PS with regulated 12V DC heaters. I built it on a chassis from a AES AE3 preamp using mostly the existing power supply.

Sound is better than the AE3, which was a typical voltage amp-cathode follower 6SN7 affair. Better in every way. Dead quiet, more dynamic and detailed. More true to life for lack of a better term. Piano sounds like piano - nothing soft or muddled, nothing edgy.

No measurements except the one that counts - listening pleasure.

MG
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Old 28th February 2006, 11:40 AM   #8
Geek is offline Geek
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I was asked by the creator of the Aikido PCB's to do a test between 1.25mA and 2mA Ia. Sonically irellevent. Because of that, I never 'scoped it.

I agree with maynardg - "No measurements except the one that counts - listening pleasure."
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Old 28th February 2006, 11:41 AM   #9
SY is offline SY  United States
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Survey: Aikido distortion
Quote:
Originally posted by Bas Horneman

If people knew how to do proper distortion measurements. They would not be ordering boards but would do point to point. The boards just make it that much easier (and neater).

The only distortion measurements I know of are on John Broskie's site.

http://www.tubecad.com/2005/January/blog0032.htm
Yeah, I saw those, and that was a good starting point. I'm quite interested in the effects of tubes, operating point, and circuit trimming.

BTW, I'm an exception to your rule- I have it built on a board (one of Broskie's- it is a heroic PCB), yet I know how to do proper distortion measurements...
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Old 28th February 2006, 11:52 AM   #10
Bas Horneman is offline Bas Horneman  Netherlands
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Quote:
BTW, I'm an exception to your rule - I have it built on a board (one of Broskie's- it is a heroic PCB), yet I know how to do proper distortion measurements...
There are always exceptions to the rule.
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