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6av6 = 12AX7?

Posted on March 14, 2017 at 06:41:19

Posts: 204
Joined: May 11, 2004
Is 6av6 equal to half the 12AX7?

If they are thesame other than the filament characteristics. Are they sound the same?


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RE: 6av6 = 12AX7?, posted on March 14, 2017 at 07:23:55

Posts: 9704
Location: East of Kansas City
Joined: January 10, 2005
No, the 6AV6, a seven pin miniature, has two diodes, that must be grounded. The 6AV6 has a round plate and grid structure. This symmetry of construction should be an advantage. No one "I" know of, has A-Bed these two tubes yet. If someone has, speak up !!

I have designed a 6AV6 DCed to the grid of a Type 46, DH amp, coming up soon !!

Jeff Medwin


RE: 6av6 = 12AX7?, posted on March 14, 2017 at 08:13:17

Posts: 495
Joined: December 17, 2010
It would be fun to compare your 46 design with Eli's new 46 design.. both subjectively and with measurements.

I realize of course his will be push pull... still I'd think that would be a good comparison of two very different philosophies.


RE: 6av6 = 12AX7?, posted on March 14, 2017 at 08:35:09

Posts: 261
Location: New Mexico
Joined: April 5, 2014
I built a small bargain-basement 6AQ5 SE integrated amplifier, using a pair of RCA 6AV6s as driver tubes.
Sounds pretty decent to me despite the little AES OPTs used.



RE: 6av6 = 12AX7?, posted on March 14, 2017 at 09:08:21
Steve O

Posts: 6654
Location: SE MI
Joined: September 6, 2001
The triode section of 6AV6 is functionally equivalent to each triode in 12AX7. Obviously pkg is different. Diodes will usually be grounded. Practically speaking, sound will be mostly a function of surrounding circuitry AND of personal expectations. Microphonics may also be an issue compared to a good 12AX7.


No, won't sound the same, posted on March 15, 2017 at 06:47:07

Posts: 5808
Location: Texas
Joined: September 24, 2006
The 6AV6 is known for being microphonic. Plus, it doesn't have the hum-reducing filament structure available in the 'AX7. Might be OK in a guitar amp, but even then, only if cost is critical. I wouldn't use it for hi-fi.

Buy Chinese. Bury freedom.


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