Tubes Asylum

RE: Least fatiguing 12AX7

38.15.201.120

SoundMann

In Reply to: RE: Least fatiguing 12AX7 posted by 70537 on May 23, 2024 at 13:51:57

My initial findings on these GE's is that they are neutral and extended, but lack a little harmonic texture. They have good air, space and imaging with exceptional rendering of high frequencies.

What I would like to do now is to find a tube that will warm things up a bit, and provide fuller harmonic detail (Mullard?).

Follow Ups:

RE: Least fatiguing 12AX7 - SoundMann 18:27:57 06/04/24 (3)
I have now found the ideal match by using the Hammond labeled GE in V1, the stock Psvane in V2, and a later GE short grey plate with round halo getter in V3.

The sound is now more neutral and balanced, with nothing added, subtracted or calling attention to itself, and has just the right amount of air, space, imaging and transparency to satisfy.
- RE: Least fatiguing 12AX7 - DaveV 08:13:57 06/05/24 (2)
  Changing parameters can alter sonics so there are many variables for sure.
  The debate about rectifier tubes may be partly due to voltage drop characteristics changing the operating parameters.
  Using a 5751 in place of a 12AX7 seems to be fairly common lately but why focus on tubes as if capacitors in use are the be all end all?
  My experience has been with vintage equipment and I've found that changing capacitors can alter the sound from the moment you turn the piece of equipment on with no so called breakin and sometimes a $2 cap just sounds better than a $30 "audiophile" cap and it's far less expensive than chasing NOS tubes. Not that tubes don't make a difference but why be restricted to them.
  
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  - RE: Least fatiguing 12AX7 - SoundMann 13:21:42 06/05/24 (1)
    I have been thinking about adding a few oil caps in a couple of critical places.
    - RE: Least fatiguing 12AX7 - DaveV 15:10:27 06/05/24 (0)
      Paper in oil caps may produce a warmer presentation but don't overlook NOS or new polyester film and foil capacitors.
      Sometimes an under $2 Illinois Capacitor Polyester Cap seems just right and placement in the circuit can matter when you start changing caps.
RCA blackplate nt - Tre' 14:45:03 05/28/24 (0)
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