What's the worst that can happen?

Discussion in 'Amp Tech Center' started by jonrpick, Jul 1, 2014.

  1. jonrpick

    jonrpick Friend of Leo's

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    Got this old RCA 6V6 with a recent project purchase. The plastic post on the base is broken off. If the glass were compromised, what would happen once it was powered up? I don't know enough about power tube failure to know whether or not it could damage my Vibro Champ.
     

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  2. dsutton24

    dsutton24 Doctor of Teleocity Ad Free Member

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    If the tube has oxygen in it, the filament will burn out in a matter of seconds. I'd be more concerned about the possibility of getting it plugged in in the wrong orientation, that could damage something. Personally I'd scrap it.
     
  3. jonrpick

    jonrpick Friend of Leo's

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    I knew about the orientation. Assuming it's correct, could I try it without worrying about the amp?
     
  4. jonrpick

    jonrpick Friend of Leo's

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    Well... got ballsy and tried it. I double-triple-quadruple checked the orientation and then fired it up.

    Looks like I've got what appears to be a fully functional vintage RCA on my hands. :D
     
  5. muchxs

    muchxs Doctor of Teleocity

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    Use it but be aware... busted guide pins invoke Murphy. The filament connections are pins 2 and 7. Clock it one click and you provide a path from pin 3 to pin 8. Pin 8 is the cathode. The cathode cap makes a big bang when you hit it with 400v.
     
  6. andyfromdenver

    andyfromdenver Friend of Leo's

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    Good work :)
    Balls of steel :lol:
    Yeah I was gonna say, just watch it, and be prepared to pull the plug.

    *insert historical quote about risk and reward and adventure or something about Socrates*
     
  7. jipp

    jipp Friend of Leo's

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    so it should be safe as long as he puts a sticker inside to remind him self. in case it gets pulled?
    chris.
     
  8. andyfromdenver

    andyfromdenver Friend of Leo's

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    As long as it's snug in there, seems ok.
    A sticker or some mark seems like a good idea; and disclosure if you sell or trade etc.
     
  9. jonrpick

    jonrpick Friend of Leo's

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    I figure what I'll do it put a white dot using Liquid Paper or something similar, maybe use a lacquer paint pen, and mark the tube's base and the socket itself, just as a visual mark for alignment in case I pull it then want to reuse it.

    I couldn't crank it, because my wife's entire family was upstairs, so... Though on second thought, I was posting during the middle of the World Cup. Her family is Puerto Rican, and the way those people screamed at the TV, I probably could've cranked up an SVT and they wouldn't have heard it. :twisted:
     
  10. bparnell57

    bparnell57 Poster Extraordinaire

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    You can buy a little replacement pin that goes on the bottom for two dollars or so if it bothers you.
     
  11. jonrpick

    jonrpick Friend of Leo's

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    How would that work? Would you glue it on? Seems like the entire base would need to be replaced.

    Couldn't I just fill in pin 6 (???) on the tube socket as well, since that pin is delete on the 6V6's?
     
  12. Bill Moore

    Bill Moore Tele-Afflicted Silver Supporter

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  13. bparnell57

    bparnell57 Poster Extraordinaire

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  14. jonrpick

    jonrpick Friend of Leo's

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    Nice... :cool:
     
  15. Johnny Cache

    Johnny Cache Former Member

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    I guess you did okay. I've come across a few tubes with the center pin broken off sometimes I found it and re glued it on. The thing I always do before putting an unknown tube in any of my equipment is test it in my tube tester. That way I know if there are any issues such as a short or vacuum leak and the tubes strength/weakness. Gives me an idea if there is something that may blow the tube or damage the amp.
     
  16. jimbo735

    jimbo735 Tele-Afflicted

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    I still have a 6l6 running in a twin with the center broken off,not saying you should do it. Have it tested first and make darn sure of pins are in the proper location.A tech could hook you up.
    CHEERS! Have a good holiday.
     
  17. soldersucker

    soldersucker TDPRI Member

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    I've seen this on lots of old power tubes.
    Just figure out where the key is and trace a big old
    line up the base and up the glass to line it up.
    Use a permanet sharpie.
    no biggie.
     
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