Mr Trev
Headphoneus Supremus
Inane thought o the day…
We have 12AT7, 12AU7, 12AX7. What happened to 12AV7 & 12AW7?
We have 12AT7, 12AU7, 12AX7. What happened to 12AV7 & 12AW7?
Darkvoice 336i & 336SE Tuberolling PartII
- Thread starter HeatFan12
- Start date
bcowen
Headphoneus Supremus
There is a 12AV7, but more commonly talked about as a 5965. Gain kind of smack dab in between a 12AU7 and a 12AT7. I've never seen or heard of a 12AW7. There's also a 6SU7 and a 6SV7, but no 6SW7. Maybe folks back then didn't like W's or something (and George W. Bush wasn't even born yet).
https://tube-data.com/sheets/127/1/12AV7.pdf
Slade01
1000+ Head-Fier
There is a 12AV7, but more commonly talked about as a 5965. Gain kind of smack dab in between a 12AU7 and a 12AT7. I've never seen or heard of a 12AW7. There's also a 6SU7 and a 6SV7, but no 6SW7. Maybe folks back then didn't like W's or something (and George W. Bush wasn't even born yet).
https://tube-data.com/sheets/127/1/12AV7.pdf
Click the link and then you've seen all the heavenly glory that is the 12AW7
https://www.radiomuseum.org/tubes/tube_12aw7.html
bcowen
Headphoneus Supremus
ACCKKK!! A pentode! No wonder I've never seen one....I didn't want to scorch my eyes.
jonathan c
Headphoneus Supremus
…perhaps WW-I and WW-II sufficed to cause avoidance of the ‘W’Maybe folks back then didn't like W's or something (and George W. Bush wasn't even born yet).
…….(and the ‘world wide web’ being a half-century later…
)
jonathan c
Headphoneus Supremus
…I recall that, last October, Head-Fier @G0rt was successfully (enjoyably) rolling 5965s in his Schiit Valhalla II…
bcowen
Headphoneus Supremus
I've got some 5965's in the stash. Sylvanias I think. I bought them probably 25 years ago but don't remember if I ever listened to them. That's bad, I suppose.
Same pinout as the other 12A's....perhaps I should try one. The Incubus didn't like the (much) higher gain of the 12AT7, but perhaps the 5965 is just low(er) enough that it'll work.
Mr Trev
Headphoneus Supremus
Lemme know if you try em in your Vali and are any goodI've got some 5965's in the stash. Sylvanias I think. I bought them probably 25 years ago but don't remember if I ever listened to them. That's bad, I suppose.
Same pinout as the other 12A's....perhaps I should try one. The Incubus didn't like the (much) higher gain of the 12AT7, but perhaps the 5965 is just low(er) enough that it'll work.
bcowen
Headphoneus Supremus
Going to be hard to beat the Footscray in the Vali, but you never know. Then again, in a $150 amp a $10 tube makes a wee bit more sense than a $120 one.
sam6550a
Headphoneus Supremus
Incubus is apparently designed to utilize the gain area of the 6SN7, not the higher gain of the 12AT7. Kudos to @Paladin79 for a great design.I've got some 5965's in the stash. Sylvanias I think. I bought them probably 25 years ago but don't remember if I ever listened to them. That's bad, I suppose.
Same pinout as the other 12A's....perhaps I should try one. The Incubus didn't like the (much) higher gain of the 12AT7, but perhaps the 5965 is just low(er) enough that it'll work.
Ripper2860
Headphoneus Supremus
12AU7 works fabulously with Incubus. 
sam6550a
Headphoneus Supremus
12au7 gain is close to 6sn7.12AU7 works fabulously with Incubus.
Ripper2860
Headphoneus Supremus
Yes it is and provides another world of possibilities. 
bcowen
Headphoneus Supremus
Yup, and fortunately my memory sucks.
I have 5963's, not 5965's. The 5963 has a gain of 21 versus the 6SN7 gain of 20 and the 12AU7 gain of 19 - 20 (depending on which data sheet you look at) so these should work just fine in both the Incubus and Vali. I'll give one a whirl tomorrow.
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