What are these tubes?

cokewithvanilla
cokewithvanilla Posts: 1,777
edited August 2010 in The Clubhouse
Anyone recognize any of this? I know that's a broad question, but I am toob-stoopid.

tubes.jpg
Post edited by cokewithvanilla on
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  • doctorcilantro
    doctorcilantro Posts: 2,028
    edited August 2010
    I recognize the 6U8, and if I zoom in it looks like the mil-spec boxes of 6AU6?

    There is one 12AU7 there too.

    Radio and TV tubes mostly.
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  • heiney9
    heiney9 Posts: 25,164
    edited August 2010
    I see a couple Raytheon 12AT7's in the back.
    "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 Labs XA25 | EE Avant Pre | EE Mini Max Supreme DAC | MIT Shotgun S1 | Pangea AC14SE MKII | Legend L600 | BlueSound Node 3 - Tubes add soul!
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  • doctorcilantro
    doctorcilantro Posts: 2,028
    edited August 2010
    ha! good eye! Wonder what those Mullards are?
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  • heiney9
    heiney9 Posts: 25,164
    edited August 2010
    Cokewithvanilla,

    It's rare (but it does happen) that when buying a "lot" of tubes you find too many used for your typical tube amplifier. Many tube "lots" that are liquidated have mostly old TV signal tubes in the mix. Certainly there might be a few keepers in the "lot" but mostly they are obsolete and unusable.

    But, the hunt is half the fun and you never know when you'll discover a few hidden gems or many highly useable tubes in a typical auction "lot". Just don;t pay too much if you're not sure what's in the "lot".

    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 Labs XA25 | EE Avant Pre | EE Mini Max Supreme DAC | MIT Shotgun S1 | Pangea AC14SE MKII | Legend L600 | BlueSound Node 3 - Tubes add soul!
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  • cokewithvanilla
    cokewithvanilla Posts: 1,777
    edited August 2010
    heiney9 wrote: »
    Cokewithvanilla,

    It's rare (but it does happen) that when buying a "lot" of tubes you find too many used for your typical tube amplifier. Many tube "lots" that are liquidated have mostly old TV signal tubes in the mix. Certainly there might be a few keepers in the "lot" but mostly they are obsolete and unusable.

    But, the hunt is half the fun and you never know when you'll discover a few hidden gems or many highly useable tubes in a typical auction "lot". Just don;t pay too much if you're not sure what's in the "lot".

    H9

    Ah. I didn't know anything about them, but the price was right so I figured it couldn't hurt. I thought someone here might have a use for a few of em.
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  • heiney9
    heiney9 Posts: 25,164
    edited August 2010
    I'd be interested in the Raytheon 12AT7's possibly. Have any photos of the tubes or can you describe them.

    Color of the plates, any date codes, shape/type of getter, test results, etc. Untested tubes w/ no way to test them usually sell for less.

    Let me know. I am curious, what are the Mullard labeled tubes? What are the white boxed tubes in the very back? Looking for 12AX7 same as ECC83 or 12AT7 same as ECC81 or 6AQ8 same as ECC85. 5751 or 6201 also.

    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 Labs XA25 | EE Avant Pre | EE Mini Max Supreme DAC | MIT Shotgun S1 | Pangea AC14SE MKII | Legend L600 | BlueSound Node 3 - Tubes add soul!
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  • cokewithvanilla
    cokewithvanilla Posts: 1,777
    edited August 2010
    heiney9 wrote: »
    I'd be interested in the Raytheon 12AT7's possibly. Have any photos of the tubes or can you describe them.

    Color of the plates, any date codes, shape/type of getter, test results, etc. Untested tubes w/ no way to test them usually sell for less.

    Let me know. I am curious, what are the Mullard labeled tubes? What are the white boxed tubes in the very back? Looking for 12AX7 same as ECC83 or 12AT7 same as ECC81 or 6AQ8 same as ECC85. 5751 or 6201 also.

    H9

    tube1.jpg
    tubes2.jpg
    tubes3.jpg


    I don't see any mullards,,, what am I missing?
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  • mhardy6647
    mhardy6647 Posts: 33,734
    edited August 2010
    You'll find 6AU6s in the IF sections of almost every old FM tuner or receiver. The 12AT7 is a close relative of the 12AU7; used in preamps and cathode follower outputs in things like tuners and tape recorder preamps.;
    There's more to life than Mullard, Amperex and Telefunken :-) Raytheon, TungSol, and the big gun US consumer electronics manufacturers of the day (GE, Sylvania, and RCA) all made some fine tubes.

    Most of the odd-lot tubes you'll find are TV and or radio (as oppposed to hifi) tubes.
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  • doctorcilantro
    doctorcilantro Posts: 2,028
    edited August 2010
    I might be interested in the Tung Sol 6x4. Do you have a way to test them? My tester needs a $300 adapter for that and similar rectifiers.
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  • doctorcilantro
    doctorcilantro Posts: 2,028
    edited August 2010
    Next to the 12AX4 are "Mullard-esque" boxes (IEC?)
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  • heiney9
    heiney9 Posts: 25,164
    edited August 2010
    Mullards are towards the left next to the Yellow Sylvania boxes in your original pics.

    About the Raytheon tubes. Can you name them off? I can barely see the writing on the tubes in the photo's. I see maybe 5963 at the far left and then moving right I have no idea of that one, contiuning left to right it looks like a 12AX7 which I am interested in, then I see a JG-12AT7 and then all the way to the right I see what looks to be an RCA but I have no idea what it is then in the front it the other JG 12AT7

    H9

    P.s. It seems the raytheon's are just boxes with other tubes in them. I am interested in all the "raytheon" pictured tubes but I need to know what they are.
    "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 Labs XA25 | EE Avant Pre | EE Mini Max Supreme DAC | MIT Shotgun S1 | Pangea AC14SE MKII | Legend L600 | BlueSound Node 3 - Tubes add soul!
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  • doctorcilantro
    doctorcilantro Posts: 2,028
    edited August 2010
    That 12AX7 might be a Telefunken smooth plate. One is a Tung Sol 12AT7WA, another is an RCA 5963, and maybe a clear top RCA 12AU7 there too?
    For Sale 2019:
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  • heiney9
    heiney9 Posts: 25,164
    edited August 2010
    doctorcilantro wrote: »
    That 12AX7 might be a Telefunken smooth plate. One is a Tung Sol 12AT7WA, another is an RCA 5963, and maybe a clear top RCA 12AU7 there too?

    Good eye on the possible clear top just noticed it. ;) The RCA to the far right has either a D getter or Square getter
    "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 Labs XA25 | EE Avant Pre | EE Mini Max Supreme DAC | MIT Shotgun S1 | Pangea AC14SE MKII | Legend L600 | BlueSound Node 3 - Tubes add soul!
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  • cokewithvanilla
    cokewithvanilla Posts: 1,777
    edited August 2010
    tubes4.jpg
    tubes5.jpg

    Let me look for you H9, gimme a second. That is a clear top in there. The far right is an RCA 5963, 4th i jg-12at7wa, 3rd -12ax7, 2nd clear top no idea,first rca 5963

    man, looks like I gotta open al lthese boxes lol
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  • heiney9
    heiney9 Posts: 25,164
    edited August 2010
    cokewithvanilla wrote: »
    tubes4.jpg
    tubes5.jpg

    Let me look for you H9, gimme a second. That is a clear top in there. The far right is an RCA 5963, 4th i jg-12at7wa, 3rd -12ax7, 2nd clear top no idea,first rca 5963

    man, looks like I gotta open al lthese boxes lol

    Yes, it looks like you'll have to open all boxes. I am interested in the 12AX7 but again I need to know what it is or a better pic of the innerds.

    The Mullard box doesn't seem to have a Mullard tube in it as you can see on the left part of the tube in your pic has an octagon with 12AT7 in black lettering. True Mullards never had that.............so it appears the tubes and boxes don't go together.

    I am interested in all 12AT7's and 12AX7's so if you get yourself organized and shoot better photo's of the innerds for those that have little to no print we can help you out with identification. ALso many time there is acid etching of tube codes (epseically Euro tubes) down towards the bottom and maby times you need to hold the tube under a strong light to read them. Those help identify too.

    Have any of these been tested? If not, I'm not willing to pay top $$$ for them but maybe we can work something out for mutiples, etc. Take your time no rush.

    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 Labs XA25 | EE Avant Pre | EE Mini Max Supreme DAC | MIT Shotgun S1 | Pangea AC14SE MKII | Legend L600 | BlueSound Node 3 - Tubes add soul!
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  • cokewithvanilla
    cokewithvanilla Posts: 1,777
    edited August 2010
    H9, I have my doubts that I will finds anywhere local that I could test these. I'll take a bunch of pictures of the 12AT7's... I have 4 so far. I started opening all the boxes, so far, most of them match... we'll see.
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  • heiney9
    heiney9 Posts: 25,164
    edited August 2010
    12AT7's are the same as ECC81

    12AX7's are the same as ECC83

    look for 5751 or 6201.

    Also looking for 6V6 or 6SL7, but that's a long shot based on your photo.

    Thanks
    "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 Labs XA25 | EE Avant Pre | EE Mini Max Supreme DAC | MIT Shotgun S1 | Pangea AC14SE MKII | Legend L600 | BlueSound Node 3 - Tubes add soul!
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  • sucks2beme
    sucks2beme Posts: 5,601
    edited August 2010
    The 6s4a's are a tube used in DIY electrostatic headphone amps(exstata).
    It's kid of a different animal. If you have any sets, they might be a go for someone.
    "The legitimate powers of government extend to such acts only as are injurious to others. But it does me no injury for my neighbour to say there are twenty gods, or no god. It neither picks my pocket nor breaks my leg." --Thomas Jefferson
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  • mhardy6647
    mhardy6647 Posts: 33,734
    edited August 2010
    sucks2beme wrote: »
    The 6s4a's are a tube used in DIY electrostatic headphone amps(exstata).
    It's kid of a different animal. If you have any sets, they might be a go for someone.

    6S4A = 6S4 One may build a nice little SE amp from the latter; as did Gary Kaufman.
    http://www.the-planet.org/6S4.html
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  • cokewithvanilla
    cokewithvanilla Posts: 1,777
    edited August 2010
    Interesting. I'm trying to figure out what I am going to do with these tubes. Are there any that are completely useless that I should just throw away?
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