Tube ID help

Discussion in 'The Squawk Box' started by Matt_21, Sep 6, 2017.

  1. Matt_21

    Matt_21 Senior Member

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    Hey guys,
    I'm a rookie when it comes to old tubes and really amps in general. I can hear what I like but, all the wiring and components and physics of it all stumps me.
    Anyways, I have some tubes that I got tossed into a trade a while back and they're supposed to be NOS 12a_7s
    If I posted pics here are there any members who could help me identify them?
    Or if anyone would prefer I could PM pics.
    Just wondering if there are any knowledgeable tube guys hanging around.
    Thanks.
     
  2. irocdave12

    irocdave12 Senior Member

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    Yes I can help you out if you post pics of them. They have to be good pics showing the internal construction as much as possible though
     
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  3. yamariv

    yamariv Senior Member

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    :photos::photos::photos::photos:
     
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  4. Matt_21

    Matt_21 Senior Member

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    Awesome! Thanks Dave. It'll have to be tomorrow after work but, I'll do my best to get good shots.
     
  5. chasenblues

    chasenblues Senior Member

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    They are gettin old ain't they..:laugh2:


    494.jpg
     
  6. Matt_21

    Matt_21 Senior Member

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    Hey,
    So I snapped some pics. Some had names written on them some didn't.
    I'll just post pics I snapped and maybe you guys can educate me a little on what's there.
    Thanks 20170907_192827.jpg 20170907_192816.jpg
     

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  7. Matt_21

    Matt_21 Senior Member

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    20170907_192226.jpg 2 more
     

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  8. Matt_21

    Matt_21 Senior Member

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    Any ideas guys?
     
  9. irocdave12

    irocdave12 Senior Member

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    They are some nice tubes particularly the ones with gold pins. Unfortunately they look to be all 12at7 tubes which are primarily driver tubes or used in reverb circuits. They are not very well liked it pre amp positions because of the affect they have on tone. Most feel it thins the sound but you could certainly try them in the v1 position and see if you like the tone. You wouldn't be the first to like what most people pass on doing. Just an FYI 12at7, ecc81, e81cc are all the same tube basically. Would have been nice if they turned out to be 12ax7 tubes
     
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  10. Matt_21

    Matt_21 Senior Member

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    Thanks for the info Dave!
    Very much appreciated.
    These things need to be tested to be sold or can I just sell them?
     
  11. irocdave12

    irocdave12 Senior Member

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    They should be tested otherwise nobody will pay much of anything for them taking a risk on if they are good. The gold pins will bring a few bucks but the market for 12 at7 tubes isn't very strong compared to 12ax7/ecc83
     
  12. Matt_21

    Matt_21 Senior Member

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    Ok. next step...find a tester haha.
    Thanks for the info brother. I really appreciate it.
     
  13. hamerfan

    hamerfan Senior Member

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    The Siemens is a East German rebrand like the RFT. The E180CC and the 5965 is not compatible with 12ax7 family. The 6201 is nice industrial type of 12at7 and works great in audio amps.
     
    Last edited: Sep 16, 2017

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