5965 tube help

[Arnie Shechtman]

Can anyone tell me about this tube? Is it a direct sub for a 12ax7?
Anyone know how they sound? Thanks.

[Max Jakobsen]

12ax7 is sub for ecc83 and it is not even near

Max

[F. Gagliano, A. Walker]

Hello Arnie- According to my books, 5965 is a computer rated 12AV7.
12AV7 has the same pin connections as a 12AX7, but requires more (.45A)
filament current, plate dissipation 2.7W, about twice that of a 12AX7,
and gain of around 40. (12AX7=100)

I hope this helps. Write if you need more info.

Allen Walker

[JAMES MCSHANE]

Arnie Shechtman <linn...@attglobal.net> wrote in message
news:38A71065...@attglobal.net...

> Can anyone tell me about this tube? Is it a direct sub for a 12ax7?
> Anyone know how they sound? Thanks.

This tube is a twin triode with the same pinout as the other 12**7 tubes, mu
in the low 40s, and it is not a direct sub for a 12AX7, although it is pin
and heater voltage compatible. The closest 12 volt tube is the 12AV7.

I use 5965s as driver tubes, and I like the sound a lot. They are very
neutral sounding to me, they have very little sound of their own IMHO. I use
a set of GE 5965s in my own all triode Citation II. I think conrad-johnson
uses them also.

There are two things I think are key to making 5965s sing:

1. Plate current should be 5 ma. per triode section or higher, and

2. Use DC on the heaters, as there is clear evidence of heater-cathode
coupling.

This tube is a real bargain too.

Jim McShane
Need NOS or Current Production Tubes? Got a Harman-Kardon Citation Amp?
See my web pages at http://pages.prodigy.net/jimmcshane

[TROOBKA]

>
>This tube is a twin triode with the same pinout as the other 12**7 tubes, mu
>in the low 40s, and it is not a direct sub for a 12AX7, although it is pin
>and heater voltage compatible. The closest 12 volt tube is the 12AV7.
>
>I use 5965s as driver tubes, and I like the sound a lot. They are very
>neutral sounding to me, they have very little sound of their own IMHO. I use
>a set of GE 5965s in my own all triode Citation II. I think conrad-johnson
>uses them also.
>
>There are two things I think are key to making 5965s sing:
>
>1. Plate current should be 5 ma. per triode section or higher, and
>
>2. Use DC on the heaters, as there is clear evidence of heater-cathode
>coupling.
>
>This tube is a real bargain too.
>
>Jim McShane
>Need NOS or Current Production Tubes? Got a Harman-Kardon Citation Amp?
>See my web pages at http://pages.prodigy.net/jimmcshane
>

HI Jim,
I like this tube a great deal and use it in guitar amps as well. I wonder if
the coupling could be the reason why with AC heating the lot I have is so
microphonic.
All the best,
Mark

[gkau...@the-planet.org]

John -

Although the 5693 wasn't spec'd for noise etc most I've seen are very
quiet and work quite nicely. Don't pass them up if the price is right. I
have a case of RCA 5693's from the late 1950's that are wonderful both for
audio and boatanchor use. 5814A's are also fine in most cases.

Audionote and others make use of the 5687 for audio use - another
"computer" tube.

I'm currently listening to a small amp based on the 6384/6AR6 wired in
triode mode. I'm sure the designer of this military beam power tube never
envisioned it's use for audio!

- Gary

Web: http://www.the-planet.org

<wb0...@prodigy.net> wrote in message
news:88a4r8$1ivq$1...@newssvr04-int.news.prodigy.com...
>
> Per Lud Sibley's "Tube Lore", 5963 = computer rated 12AU7. "Not intended
> for conventional amplifiers as to noise, microphonics, or plate-current
> imbalance."
>
> Good for a flip-flop in a prehistoric computer, but not great for audio.
>
> 73 John