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Author Topic: Tube Picture Guide  (Read 15750 times)

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Offline cheshirecat

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Re: Tube Picture Guide
« Reply #30 on: March 21, 2005, 09:26:24 PM »
German Made "Siemans" 6CA7/EL34 notice the slimmer glass envelope, single halo getter.  This one labeled for International Servicemaster.  No hole in guide pin on these and all 8 pins present, crimped pates.
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SB2 / Rega P1 > Modified Dynaco PAS2 > Modified Dynaco MK-IV monoblocks> Axiom M22 v2

Offline cheshirecat

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Re: Tube Picture Guide
« Reply #31 on: March 21, 2005, 09:31:15 PM »
Mullard "Shield" logo 5AR4/GZ34 rectifier, the holy grail of GZ34s.  Again, these have the guide pin holes and etched date codes common to Mullard tubes.
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SB2 / Rega P1 > Modified Dynaco PAS2 > Modified Dynaco MK-IV monoblocks> Axiom M22 v2

Offline cheshirecat

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Re: Tube Picture Guide
« Reply #32 on: March 21, 2005, 09:38:01 PM »
Telefunken EL84/6BQ5, like other TFK tubes, this has the <> between the pins on the bottom.

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SB2 / Rega P1 > Modified Dynaco PAS2 > Modified Dynaco MK-IV monoblocks> Axiom M22 v2

Offline cheshirecat

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Re: Tube Picture Guide
« Reply #33 on: March 21, 2005, 09:49:56 PM »
Mullard XF2 Single Halo with welded plates.  This one labeled for Amprex with the orange "world" logo.
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SB2 / Rega P1 > Modified Dynaco PAS2 > Modified Dynaco MK-IV monoblocks> Axiom M22 v2

Offline Nick Culbreth

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Tung Sol 6SN7GT
« Reply #34 on: December 13, 2005, 12:14:39 AM »
This Tungsol 6SN7 dates from 1954.  This tube isn't quite as highly regarded as the earlier VT-231 roundplates but they are still very refined with a clear fast sound.
« Last Edit: December 14, 2005, 03:23:51 PM by Nick Culbreth »
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Offline Nick Culbreth

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Ken Rad 6SN7GT
« Reply #35 on: December 13, 2005, 12:23:27 AM »
I'm not sure on the exact date on this but I believe it dates from the mid 1940s - 1950s.  This version has staggered plates and from what I can tell it is identical to the Ken Rad VT-231.  Overall this tube doesn't have a ton of warmth but it is fairly clean and has wonderfully extended bass.
« Last Edit: December 13, 2005, 11:51:42 PM by Nick Culbreth »
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Offline Nick Culbreth

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Sylvania 6SN7GTA
« Reply #36 on: December 13, 2005, 12:28:17 AM »
I believe this tube dates from the 1950s but I don't have an exact year.  I haven't had a chance to listen to this tube very much so I can't really comment on its sound.
« Last Edit: December 13, 2005, 11:52:34 PM by Nick Culbreth »
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Offline Nick Culbreth

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RCA 6SN7GTB
« Reply #37 on: December 13, 2005, 11:58:18 PM »
I'm not exactly sure what year this tube was made but I belive it dates from the mid 1950s.  Overall it's a pretty decent tube with a nice warm midrange, though the highs are a bit rolled off.
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Offline Nick Culbreth

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Ken Rad VT-231
« Reply #38 on: December 14, 2005, 12:04:47 AM »
This tube dates from 1945-1950.  It is the same as the Ken Rad 6SN7GT, the only difference is this tube was manufactured for the US military so it was labeled VT-231 which is the military equivalent of the 6SN7.
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Offline Brian Skalinder

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Re: Tube Picture Guide
« Reply #39 on: December 14, 2005, 12:08:05 AM »
Nick - do you actually own and/or run all these tubes?!?
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Milab VM-44 Links > Fostex FR-2LE or
Naiant IPA (tinybox format) >
Roland R-05

Offline Nick Culbreth

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Electro Harmonix 6SN7
« Reply #40 on: December 14, 2005, 12:09:21 AM »
This is a current production tube made in Russia.  Overall it's a pretty decent tube, it sounds a little bit cold but it is very quiet.  This tube would be a good option for high gain applications but wouldn't be as good for tone control.
« Last Edit: December 14, 2005, 12:11:15 AM by Nick Culbreth »
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Offline Nick Culbreth

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Re: Tube Picture Guide
« Reply #41 on: December 14, 2005, 12:10:13 AM »
Quote from: Brian Skalinder on December 14, 2005, 12:08:05 AM
Nick - do you actually own and/or run all these tubes?!?

Yes these tubes are all from my personal stash.  :)
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Offline Brian Skalinder

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Re: Tube Picture Guide
« Reply #42 on: December 14, 2005, 12:11:29 AM »
Quote from: Nick Culbreth on December 14, 2005, 12:10:13 AM
Yes these tubes are all from my personal stash.  :)

Good God, man!!   :o
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Milab VM-44 Links > Fostex FR-2LE or
Naiant IPA (tinybox format) >
Roland R-05

Offline Nick Culbreth

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Sylvania 12AU7A Short Plate
« Reply #43 on: December 14, 2005, 12:18:47 AM »
This guy is a bit of a mystery to me, it shares a similar structure with the other Sylvania 12AU7A tube I have but the plates are significantly shorter and it has some sort of code under the acid etch.  This tube has a D shaped getter which can be seen in the second picture.  I only have one of these right now so I can't really comment on the sound until I track down a mate for it.
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Offline Nick Culbreth

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Re: Tube Picture Guide
« Reply #44 on: December 14, 2005, 12:23:45 AM »
Quote from: Brian Skalinder on December 14, 2005, 12:11:29 AM
Good God, man!!   :o

I like to keep my options open.  :)

Really I don't have a ton of tubes, just a few of each variety I need.  As far as I'm concerned it's easier to roll in different tubes than it is to buy new gear when you get tired of the sound.
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