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Thread: Anyone know what these tubes are?

  1. #1
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    Anyone know what these tubes are?

    We've recently come into possession of a lot of valves at work. I've managed to find at least a little info on just about all of them, but I can't find anything on these 2, and we have a bunch of each of them. Anyone know what they are, and maybe even what they'd sell for?
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  2. #2
    [WBF Founding Member] Addicted to Best! JackD201's Avatar
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    6-pin , grid at top, a 75 tube perhaps?
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  3. #3
    [WBF Founding Member] Addicted to Best! JackD201's Avatar
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    strange 4311 are supposed to be 5 Pins

    http://www.radiomuseum.org/tubes/tube_4311b.html
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    Co-Founder and Managing Director PureSound PH - Exclusive Distributor (Philippines only) of Lamm, Von Schweikert Audio, CH Precision, Light Harmonic, Valvet, Townshend, Critical Mass Systems, EERA, KR Audio, Ambience SS, TechDAS, Master Built

  4. #4
    Addicted to Best! Diapason's Avatar
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    Photo looks like the 4311B has 5 pins and the 4310A has 6, so it checks out.
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