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    12AX7 Rarities...Believe it....or Not...

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    edgobb

    Posts : 60
    Join date : 2010-11-09
    Location : Texas

    12AX7 Rarities...Believe it....or Not...

    Post by edgobb on Sun Feb 07, 2016 10:18 pm

    Don't know if anyone has caught wind of these yet...

    I'll ask my in-laws for a loan.

    http://www.ebay.com/itm/MEGA-EXTREMELY-RARE-TUBES-NOS-PAIR-12AX7-SILVER-COPPER-FOIL-GETTER-TUNGSOL-/401065524996?hash=item5d615e3f04%3Ag%3ApooAAOSwoydWsdJA

    Cheers,
    Ed

    10-E-C

    Posts : 75
    Join date : 2014-02-12
    Age : 62
    Location : upper east tn

    Re: 12AX7 Rarities...Believe it....or Not...

    Post by 10-E-C on Sun Feb 07, 2016 11:07 pm

    edgobb wrote:Don't know if anyone has caught wind of these yet...

    I'll ask my in-laws for a loan.

    http://www.ebay.com/itm/MEGA-EXTREMELY-RARE-TUBES-NOS-PAIR-12AX7-SILVER-COPPER-FOIL-GETTER-TUNGSOL-/401065524996?hash=item5d615e3f04%3Ag%3ApooAAOSwoydWsdJA

    Cheers,
    Ed


    Don't forget the free shipping!!

    peterh

    Posts : 642
    Join date : 2012-12-25
    Location : gothenburg, sweden

    Re: 12AX7 Rarities...Believe it....or Not...

    Post by peterh on Mon Feb 08, 2016 4:59 am

    edgobb wrote:Don't know if anyone has caught wind of these yet...

    I'll ask my in-laws for a loan.

    http://www.ebay.com/itm/MEGA-EXTREMELY-RARE-TUBES-NOS-PAIR-12AX7-SILVER-COPPER-FOIL-GETTER-TUNGSOL-/401065524996?hash=item5d615e3f04%3Ag%3ApooAAOSwoydWsdJA

    Cheers,
    Ed
    I can smell the oil droppings from the snake(s)

    hansfob

    Posts : 18
    Join date : 2010-10-24
    Age : 52
    Location : Rickmansworth, England

    Re: 12AX7 Rarities...Believe it....or Not...

    Post by hansfob on Tue Feb 09, 2016 5:20 am

    When something is described as extremely rare, in this case the advert says possibly the only two in existence, one has to ask why. The advertisement says they were made in the 1950s so maybe many others have ceased to exist. In which case perhaps they were never any good in the first place or just not popular for most applications for some reason. Do I smell snake oil burning as well? Unless somebody can convince me otherwise, I think they are to be avoided.

    hansfob

    Posts : 18
    Join date : 2010-10-24
    Age : 52
    Location : Rickmansworth, England

    Re: 12AX7 Rarities...Believe it....or Not...

    Post by hansfob on Tue Feb 09, 2016 5:28 am

    Just had a google of the number stamped on the tube and it would appear that they may have been manufactured as computer tubes even possibly made by IBM

    http://www.computerhistory.org/collections/catalog/102735255

    peterh

    Posts : 642
    Join date : 2012-12-25
    Location : gothenburg, sweden

    Re: 12AX7 Rarities...Believe it....or Not...

    Post by peterh on Tue Feb 09, 2016 5:57 am

    There is ( as always ) a good explanation :
    One major factor leading to the overall decline in the quality of tubes since the late 50's has been the substitution of diminitive, sickly Metric Watts, in place of the full-bodied, robust Imperial Watts that had been the norm.

    Another problem, seldom mentioned even among tube manufacturers, is the increasing scarcity of Audiophile Grade Vacuum. Since the implosion of the Siberian Vacuum Mines (the sole worldwide source of audio grade vacuum) a few years ago, the price of premium vacuum has skyrocketed. Attempts to create a synthetic Audio Grade Vacuum have, so far, failed and production facilities have nothing to show for all their efforts. Not surprisingly, Blackmarket sources have often substituted Industrial Grade Vacuum (with all of it's impurities) in an effort to fool the unwary and reap enomous profits.

    Best Regards,
    TerryO
    ( from audiokarma )


    Kentley

    Posts : 299
    Join date : 2015-03-06
    Age : 64
    Location : Worcester, MA

    Re: 12AX7 Rarities...Believe it....or Not...

    Post by Kentley on Tue Feb 09, 2016 6:32 am

    peterh wrote:There is ( as always ) a good explanation :
       One major factor leading to the overall decline in the quality of tubes since the late 50's has been the substitution of diminitive, sickly Metric Watts, in place of the full-bodied, robust Imperial Watts that had been the norm.

       Another problem, seldom mentioned even among tube manufacturers, is the increasing scarcity of Audiophile Grade Vacuum. Since the implosion of the Siberian Vacuum Mines (the sole worldwide source of audio grade vacuum) a few years ago, the price of premium vacuum has skyrocketed. Attempts to create a synthetic Audio Grade Vacuum have, so far, failed and production facilities have nothing to show for all their efforts. Not surprisingly, Blackmarket sources have often substituted Industrial Grade Vacuum (with all of it's impurities) in an effort to fool the unwary and reap enomous profits.

       Best Regards,
       TerryO
     ( from audiokarma )


    If that be the case, oh Mr. TerryO, I have the ultimate inexpensive source, easily accessible, for The Perfect Vacuum -- the space between your ears. drunken


    Last edited by Kentley on Tue Feb 09, 2016 10:06 am; edited 1 time in total (Reason for editing : irony)

    Tom

    Posts : 166
    Join date : 2011-04-04

    Re: 12AX7 Rarities...Believe it....or Not...

    Post by Tom on Tue Feb 09, 2016 10:25 am

    You would think the $8500 price might just be a typo
    from a guy with 100% positive feedback
    but no,
    they're actually marked down from $10,000
    Shocked

    Gregg R.

    Posts : 80
    Join date : 2014-02-20
    Age : 71
    Location : Land of 11,842 Lakes

    Re:12AX7 Rarities..Believe it...or Not...

    Post by Gregg R. on Wed Feb 10, 2016 6:10 am

    Here is my favorite item from old_guy_radiola on eBay:

    Giant Tube

    Save 15%!! "new perfect" Act now!!

    GP49

    Posts : 718
    Join date : 2009-04-30
    Location : East of the sun and west of the moon

    Re: 12AX7 Rarities...Believe it....or Not...

    Post by GP49 on Wed Feb 10, 2016 11:10 am

    Gregg R. wrote:Here is my favorite item from old_guy_radiola on eBay:

    Giant Tube

    Save 15%!! "new perfect" Act now!!

    "Never used."

    "Fully tested." Tested how? LOOKED at it? "Yup. It's a toob!"

    Tom

    Posts : 166
    Join date : 2011-04-04

    Re: 12AX7 Rarities...Believe it....or Not...

    Post by Tom on Wed Feb 10, 2016 12:37 pm

    I've got a buddy who's owns a machine shop.

    He's got a vintage lathe in there, all DC motors,
    with a rectifier tube nearly that big.

    He is not at all impressed with tiny little GZ34's.

    Razz

    Sponsored content

    Re: 12AX7 Rarities...Believe it....or Not...

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