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NOS RCA 5Y3's

Discussion in 'Glowing Bottle Tube Amp Forum' started by spayne99, Jan 10, 2014.

  1. spayne99

    spayne99 Tele-Holic

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    NOS tubes are something new to me. Can anyone tell me the difference between these RCA's? The one on the left came in a used Swart that I just got but sadly the plastic pin broke off in transit. The one on the right I just got off eBay. I see they're constructed a bit differently from each other.
     

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  2. Glen Smith

    Glen Smith RIP

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    Bump !!
     
  3. Telenut62

    Telenut62 Poster Extraordinaire

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  4. uriah1

    uriah1 Telefied Gold Supporter

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    Just bottom getter vs top getter?

    Not sure that would matter a whole lot, but, I not sure.

    .
     
  5. CoolBlueGlow

    CoolBlueGlow Tele-Afflicted

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    There are slip on repair adapters to subatitute for the missing indexing pin. Or, if you really want a snazzy repair, rob a pin from the base off a low value/worn out octal and carefully epoxy it onto your good tube. Make sure you get the index in the right orientation. :)
     
  6. CoolBlueGlow

    CoolBlueGlow Tele-Afflicted

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    The one on the left in pic 1 is from the late 50's or early 60's. the one on the right is mid 70's

    Speaking of 5Y3 "RCA" Check out these on eBay.

    http://www.ebay.com/itm/2-Pcs-NOS-RCA-Black-Plate-5Y3GT-Audio-Radio-Vacuum-Tubes-NIB-/251437023905

    Maybe Im being too persnickety, but they look like fakes to me. IME, RCA brands their bases, and the construction for this logo era looks all wrong to me as well. Besides, that is some really crummy logo work. Never seen a real RCA tube with such sloppy silk screen...

    But maybe I'm wrong?
     
  7. dan1952

    dan1952 Friend of Leo's

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    Why bother faking a rectifier tube?
     
  8. muchxs

    muchxs Doctor of Teleocity

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    Like you said, the lettering looks chubby and malformed.

    FAKE!!!!

    Time to fire up th' 'ol WayBack Machine. Toss a couple banana peels in the reactor on th' 'ol DeLorean and take a trip back in time...

    ...to the '80s. Vacuum tubes had been "obsolete" for 20 years. U.S. production was winding down. There was still modest demand. What to do?

    Buy tubes somewhere they were still made. Like... like behind the Iron Curtain. Except we weren't supposed to trade with the Soviet Union. Easy fix! Just print RCA logos on the tubes and stick 'em in bootleg RCA boxes.

    Wanna buy some Beats headphones or a Gucci bag?! :D
     
  9. BiggerJohn

    BiggerJohn Friend of Leo's

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    The one on the left is genuine RCA manufactured. The one on the right is either a GE or a Sylvania. Once RCA stopped making those models they bought them from others and relabeled. So i would say RCA did the relabel themselves.

    They are both real genuine 5Y3 dont worry.
     
  10. muchxs

    muchxs Doctor of Teleocity

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  11. kbee

    kbee TDPRI Member

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    Much,

    Your PM box is full.......
     
  12. 6942

    6942 Poster Extraordinaire

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    Back during the tube era, re-branding of tubes was VERY common.
    You even had a few 'shady' outfits, that would clean USED tubes, put their logo on them, box them up, and sell them as NEW tubes!!

    Back then, just as today......buyer beware!
     
  13. OaklandA

    OaklandA Friend of Leo's Platinum Supporter

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    Well, they sold for $59.99. Probably over double cost. Do that enough times...
     
  14. Riffraff12571

    Riffraff12571 Tele-Holic

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    The tube on the right does look like a rebrand. I just ordered some myself for a poweramp in a '41 Capehart console someone gave me. The logo looks like the '70s logo but the plates look like your earlier tube.

    [​IMG]
     
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