Nice pair 1951-52 Tung Sol Black Plate 12AX7

Pretty rare to find these days. Long black plates, bent square getter. One of the best sounding BP 12AX7's around. These are the real deal, not rebranded RCA's like so many after 1952, These were made 1949-1952 by Tung Sol, anything after was rebranded and manufactured mostly by RCA.

This pretty much sums it up.

http://www.tubemaze.info/tung-sol-12ax7-black-plates/

I some how ended up with 4 pairs of these over the years and I don't need them all in my stash. These are well matched and very strong.

$155/pr. Shipped and insured - Paypal preferred.

Post interest here or PM.

Thanks for looking, I can take some photo's but they look like the one in the link.

H9
"Appreciation of audio is a completely subjective human experience. Measurements can provide a measure of insight, but are no substitute for human judgment. Why are we looking to reduce a subjective experience to objective criteria anyway? The subtleties of music and audio reproduction are for those who appreciate it. Differentiation by numbers is for those who do not".--Nelson Pass

Pass Aleph 30 | EE Avant Pre | EE Mini Max Plus DAC | MIT Shotgun S3 | MIT Z P/C's | updated SDA 1C| SQ Box Touch/Welbourne Labs P/S- Tubes add soul!

Comments

  • stretchlstretchl Posts: 1,295
    Interesting to see this and read about these tubes. I really don't have a need for them as the only amp I have that uses the 12AX7 is a Yaqin that I don't play much anymore. Just curious, though – Is it true that one would see less marginal sound improvement from high quality tubes like these if they're used in a pre-amp vs a power amp? Thanks and GLWTS -
    “Anti-intellectualism has been a constant thread winding its way through our political and cultural life, nurtured by the false notion that democracy means that 'my ignorance is just as good as your knowledge.'
    - Isaac Asimov

    Hi-Fi
    Apple Lossless --> Squeezebox Touch --> Joule Electra LA-100 Mark iii --> Yaqin MC-10t --> LSiM-705's
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    http://StretchPhotography.com
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  • GlennDogGlennDog Posts: 2,001
    Do these have the ...

    "The black plate TungSol 12AX7 with the “Bent rectangle” shaped getter is a fantastic 12AX7 "

    Think'n this might be my huckleberry . . .
    Power Rogue M180 monos & Adcom GFA 5802
    PS Audio PerfectWave Power Plant 10
    Rears Salk SuperCharged Surrounds
    Source PSA PWT into NSD Supremo
    Pre/Pro Integra DHC 40.1
    LCD Samsung LN46B750
    Mains Salk HT2-TL
    Center Salk HT2C
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  • heiney9heiney9 Posts: 24,109
    Yes, bent rectangle, I call it square but in reality it is rectangle.

    H9
    "Appreciation of audio is a completely subjective human experience. Measurements can provide a measure of insight, but are no substitute for human judgment. Why are we looking to reduce a subjective experience to objective criteria anyway? The subtleties of music and audio reproduction are for those who appreciate it. Differentiation by numbers is for those who do not".--Nelson Pass

    Pass Aleph 30 | EE Avant Pre | EE Mini Max Plus DAC | MIT Shotgun S3 | MIT Z P/C's | updated SDA 1C| SQ Box Touch/Welbourne Labs P/S- Tubes add soul!
  • heiney9heiney9 Posts: 24,109
    GlennDog wrote: »

    Think'n this might be my huckleberry . . .

    They are fantastic tubes!

    H9

    "Appreciation of audio is a completely subjective human experience. Measurements can provide a measure of insight, but are no substitute for human judgment. Why are we looking to reduce a subjective experience to objective criteria anyway? The subtleties of music and audio reproduction are for those who appreciate it. Differentiation by numbers is for those who do not".--Nelson Pass

    Pass Aleph 30 | EE Avant Pre | EE Mini Max Plus DAC | MIT Shotgun S3 | MIT Z P/C's | updated SDA 1C| SQ Box Touch/Welbourne Labs P/S- Tubes add soul!
  • headrottheadrott Posts: 5,428
    Hmmmm. Don't have a pair of these. How do these compare to the Valvo long plate 45 degree halo getters? Sounds like a pretty different tube......

    Or how about the RCA 5751 black plates? I would be using these tung sol tubes in in my DAC, replacing the RCA 5751 tubes...... I would get a little more gain from these too.
    Relayer-Big-O-Poster.jpg
    Taken from a recent Audioholics reply regarding "Club Polk" and Polk speakers:
    "I'm yet to hear a Polk speaker that merits more than a sentence and 60 seconds discussion." :\
    My response is: If you need 60 seconds to respond in one sentence, you probably should't be evaluating Polk speakers.....


    "Green leaves reveal the heart spoken Khatru"- Jon Anderson

    "Have A Little Faith! And Everything You'll Face, Will Jump From Out Right On Into Place! Yeah! Take A Little Time! And Everything You'll Find, Will Move From Gloom Right On Into Shine!"- Arthur Lee
  • heiney9heiney9 Posts: 24,109
    A bit more transparent and articulate than the Valvo's and deeper bass. If anything the Valvo's can be a tad "polite" in the low bass region.

    More resolution and transparency than RCA 5751. The only other tube that comes to mind similar to the TS's are the 1956 RCA 12AX7 BP, Horseshoe (sometimes called fat D) getter on short post with double cross bar. Also a very hard to find tube. The TS's are smoother while still being articulate.

    H9
    "Appreciation of audio is a completely subjective human experience. Measurements can provide a measure of insight, but are no substitute for human judgment. Why are we looking to reduce a subjective experience to objective criteria anyway? The subtleties of music and audio reproduction are for those who appreciate it. Differentiation by numbers is for those who do not".--Nelson Pass

    Pass Aleph 30 | EE Avant Pre | EE Mini Max Plus DAC | MIT Shotgun S3 | MIT Z P/C's | updated SDA 1C| SQ Box Touch/Welbourne Labs P/S- Tubes add soul!
  • headrottheadrott Posts: 5,428
    Thanks for the description Brock.

    RCA 5751's can be a little muddy, I notice. But they have great bass as far how low they reach. If I can get a tube that has a combination of both (along with transparency and detail), that would be my ideal tube.

    I have a pair of RCA BP 12AX7's with the horseshoe getter. Should I stick with those? Or would upgrading to these be worth while?
    Relayer-Big-O-Poster.jpg
    Taken from a recent Audioholics reply regarding "Club Polk" and Polk speakers:
    "I'm yet to hear a Polk speaker that merits more than a sentence and 60 seconds discussion." :\
    My response is: If you need 60 seconds to respond in one sentence, you probably should't be evaluating Polk speakers.....


    "Green leaves reveal the heart spoken Khatru"- Jon Anderson

    "Have A Little Faith! And Everything You'll Face, Will Jump From Out Right On Into Place! Yeah! Take A Little Time! And Everything You'll Find, Will Move From Gloom Right On Into Shine!"- Arthur Lee
  • headrottheadrott Posts: 5,428
    Also Brock. How are the labels on these? Still there and easy to read?
    Relayer-Big-O-Poster.jpg
    Taken from a recent Audioholics reply regarding "Club Polk" and Polk speakers:
    "I'm yet to hear a Polk speaker that merits more than a sentence and 60 seconds discussion." :\
    My response is: If you need 60 seconds to respond in one sentence, you probably should't be evaluating Polk speakers.....


    "Green leaves reveal the heart spoken Khatru"- Jon Anderson

    "Have A Little Faith! And Everything You'll Face, Will Jump From Out Right On Into Place! Yeah! Take A Little Time! And Everything You'll Find, Will Move From Gloom Right On Into Shine!"- Arthur Lee
  • kharp1kharp1 Posts: 3,310
    Thinking...thinking...
    Main System:
    Joule-Electra LA 100 MKIII Upgraded by Rich Brkich Pre
    Butler Audio TBD 2250 Amp
    PS Audio DirectStream DAC and MemoryPlayer Transport
    LSA-1 Statement
    SVS SB4000 & SB2000
    Wireworld Equinox 7 bi-wire, Wireworld Silver Eclipse 7 IC

    Secondary Rig:
    Parasound P5, Audio Electronics by Cary Constellation
    Marsh a200s, Audio Elecrtonics by Cary Hercules
    Pioneer Elite DV-45a, Denon DVD-2910
    Klipsch Epic CF-1, Vandersteen 3CE sig
    Analysus Plus Oval

    Backup Gear:
    Pass Labs Aleph 30, McCormack DNA-125, Parasound A21
    Marantz SA-14S1
    Usher CP-6311/Tyler Acoustics Taylo Reference Monitor, LSA-1
  • headrottheadrott Posts: 5,428
    PM sent Brock.
    Relayer-Big-O-Poster.jpg
    Taken from a recent Audioholics reply regarding "Club Polk" and Polk speakers:
    "I'm yet to hear a Polk speaker that merits more than a sentence and 60 seconds discussion." :\
    My response is: If you need 60 seconds to respond in one sentence, you probably should't be evaluating Polk speakers.....


    "Green leaves reveal the heart spoken Khatru"- Jon Anderson

    "Have A Little Faith! And Everything You'll Face, Will Jump From Out Right On Into Place! Yeah! Take A Little Time! And Everything You'll Find, Will Move From Gloom Right On Into Shine!"- Arthur Lee
  • kharp1kharp1 Posts: 3,310
    I'll take them if headrott passes.
    Main System:
    Joule-Electra LA 100 MKIII Upgraded by Rich Brkich Pre
    Butler Audio TBD 2250 Amp
    PS Audio DirectStream DAC and MemoryPlayer Transport
    LSA-1 Statement
    SVS SB4000 & SB2000
    Wireworld Equinox 7 bi-wire, Wireworld Silver Eclipse 7 IC

    Secondary Rig:
    Parasound P5, Audio Electronics by Cary Constellation
    Marsh a200s, Audio Elecrtonics by Cary Hercules
    Pioneer Elite DV-45a, Denon DVD-2910
    Klipsch Epic CF-1, Vandersteen 3CE sig
    Analysus Plus Oval

    Backup Gear:
    Pass Labs Aleph 30, McCormack DNA-125, Parasound A21
    Marantz SA-14S1
    Usher CP-6311/Tyler Acoustics Taylo Reference Monitor, LSA-1
  • dromundsdromunds Posts: 8,181
    H9, could you please explicate on the sound diff b/t this tube and the Tung Sol long grey plate slant square getter? Thanks
  • muncybobmuncybob Posts: 2,121
    Put me 3rd in line please. Also, would love to try those 5751's in my pre.
    Yep, my name really is Bob.
    Parasound HCA1500, Dynaco PAS4, Denon DP1200 w/Shure V15 Type V and Jico SAS stylus, Oppo BDP93, Marantz UD7007, modded Polk SDA 2B.
  • headrottheadrott Posts: 5,428
    If I like the Tung Sol tubes, I would consider selling a pair of the 5751's. I have several. Mostly RCA's, but also a pair of virtually brand new (literally used about an hour, brought from Tube Maze, if I remember correctly) that I would consider selling.
    Relayer-Big-O-Poster.jpg
    Taken from a recent Audioholics reply regarding "Club Polk" and Polk speakers:
    "I'm yet to hear a Polk speaker that merits more than a sentence and 60 seconds discussion." :\
    My response is: If you need 60 seconds to respond in one sentence, you probably should't be evaluating Polk speakers.....


    "Green leaves reveal the heart spoken Khatru"- Jon Anderson

    "Have A Little Faith! And Everything You'll Face, Will Jump From Out Right On Into Place! Yeah! Take A Little Time! And Everything You'll Find, Will Move From Gloom Right On Into Shine!"- Arthur Lee
  • joecoulsonjoecoulson Posts: 3,347
    Newbie questions here:
    Can a 12ax7 be used on the same circuit as a 12au7 (in dual triode mode)?
    Will it produce more gain and potentially more noise into the system as stated above?
    Auralic Vega G1/Rega TT/Denon SACD - PS Audio SGC - PS Audio M700x2 - Elac Adante AF-61
  • heiney9heiney9 Posts: 24,109
    joecoulson wrote: »
    Newbie questions here:
    Can a 12ax7 be used on the same circuit as a 12au7 (in dual triode mode)?
    Will it produce more gain and potentially more noise into the system as stated above?

    Typically no. You'd have to check with the manufacturer. I'm sure in some cases it would work without hurting anything, but circuits are designed around one tube/tube type usually, so going way outside the parameters usually doesn't get you great of results.........but that's just the general rule.

    H9

    "Appreciation of audio is a completely subjective human experience. Measurements can provide a measure of insight, but are no substitute for human judgment. Why are we looking to reduce a subjective experience to objective criteria anyway? The subtleties of music and audio reproduction are for those who appreciate it. Differentiation by numbers is for those who do not".--Nelson Pass

    Pass Aleph 30 | EE Avant Pre | EE Mini Max Plus DAC | MIT Shotgun S3 | MIT Z P/C's | updated SDA 1C| SQ Box Touch/Welbourne Labs P/S- Tubes add soul!
  • joecoulsonjoecoulson Posts: 3,347
    Ok, thanks for that
    Auralic Vega G1/Rega TT/Denon SACD - PS Audio SGC - PS Audio M700x2 - Elac Adante AF-61
  • GlennDogGlennDog Posts: 2,001
    muncybob wrote: »
    Put me 3rd in line please. Also, would love to try those 5751's in my pre.

    Should this be marked SOLD ? ?
    Power Rogue M180 monos & Adcom GFA 5802
    PS Audio PerfectWave Power Plant 10
    Rears Salk SuperCharged Surrounds
    Source PSA PWT into NSD Supremo
    Pre/Pro Integra DHC 40.1
    LCD Samsung LN46B750
    Mains Salk HT2-TL
    Center Salk HT2C
    Pre Cary SLP-05
    Wires WW & MIT
  • heiney9heiney9 Posts: 24,109
    **BUMP**

    I've decided to sell another pair as I don't need all these sitting around not getting used. It's a great tube that other's need an opportunity to try.

    Same as the original post. I prefer Paypal friends and family.

    H9
    "Appreciation of audio is a completely subjective human experience. Measurements can provide a measure of insight, but are no substitute for human judgment. Why are we looking to reduce a subjective experience to objective criteria anyway? The subtleties of music and audio reproduction are for those who appreciate it. Differentiation by numbers is for those who do not".--Nelson Pass

    Pass Aleph 30 | EE Avant Pre | EE Mini Max Plus DAC | MIT Shotgun S3 | MIT Z P/C's | updated SDA 1C| SQ Box Touch/Welbourne Labs P/S- Tubes add soul!
  • jonicontjonicont Posts: 223
    Pm sent
    SDA 2BTL , DREADNAUGHT, REGA P3-24 (TT-PSU),Groovetracer sub platter, Delrin platter, Origin Live Encounter tonearm, DYNAVECTOR 20X2 LOMC, Rogue Ares Magnum, WYRED 4 SOUND DAC 1, McCormack DNA 0.5 Gold, ARC LS-17se, MIT AVT MA IC'S & SPEAKER CABLESSqueezebox Touch-Wellborne Power
  • heiney9heiney9 Posts: 24,109
    Pm sent
    "Appreciation of audio is a completely subjective human experience. Measurements can provide a measure of insight, but are no substitute for human judgment. Why are we looking to reduce a subjective experience to objective criteria anyway? The subtleties of music and audio reproduction are for those who appreciate it. Differentiation by numbers is for those who do not".--Nelson Pass

    Pass Aleph 30 | EE Avant Pre | EE Mini Max Plus DAC | MIT Shotgun S3 | MIT Z P/C's | updated SDA 1C| SQ Box Touch/Welbourne Labs P/S- Tubes add soul!
  • heiney9heiney9 Posts: 24,109
    $OLD
    "Appreciation of audio is a completely subjective human experience. Measurements can provide a measure of insight, but are no substitute for human judgment. Why are we looking to reduce a subjective experience to objective criteria anyway? The subtleties of music and audio reproduction are for those who appreciate it. Differentiation by numbers is for those who do not".--Nelson Pass

    Pass Aleph 30 | EE Avant Pre | EE Mini Max Plus DAC | MIT Shotgun S3 | MIT Z P/C's | updated SDA 1C| SQ Box Touch/Welbourne Labs P/S- Tubes add soul!
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