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Old 23rd July 2009, 11:29 AM   #11
sajti is offline sajti  Hungary
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The advantages of the second solution:
- higher load impedance for the cathode follower, makes less distortion
- no DC current, and less AC current flow into the ground point

But maybe I'm wrong.

Sajti
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Old 23rd July 2009, 02:11 PM   #12
jmbee is offline jmbee  France
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you are not wrong but distorsion mainly comes from the first stage with medium high
impédance loads.
If each stage mainly generates second harmonic distorsion, say first satge DH1, second stages DH2 , total distorsion is ( DH1 - DH2) because phase turns.

crd
jmb
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Old 24th July 2009, 12:54 PM   #13
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Hi Cedus,
you might want to stay clear form tail current sources, as me experiments have shown, see
SE to Balanced tube preamp idea
I think Satji has got the idea.
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Old 24th July 2009, 01:02 PM   #14
sajti is offline sajti  Hungary
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I want to avoid to use any ccs. The psu will be unregulated.

Sajti
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Old 24th July 2009, 01:28 PM   #15
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...and it will sound better!
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