Crosspost: Finding A Replacement Tube Socket For A 69 Super Pa.

Discussion in 'Let's Talk Vintage' started by RevJamie, Jan 30, 2018.

  1. RevJamie

    RevJamie Active Member

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    Sorry to cross post, but the guys in the workbench said someone here might know.

    So I bought a 69 Super PA a few months ago, and I’ve been trying to tune it up a bit. One of the issues we it had a wonky replacement power tube socket.

    So I bought one that I thought was more correct for the amp.
    Socket - Belton, Micalex, 8 pin octal, MIP
    https://www.amplifiedparts.com/products/socket-belton-micalex-8-pin-octal-mip

    But there seems to be a little plastic lip with a diameter of about 30MM.
    [​IMG]

    The inside hole in the amp is 28.2mm.
    [​IMG]
    About a 2mm difference. Did i just buy the wrong tube socket? Everything on amplified parts seems to say "1 3/16" to 1 ¼" chassis hole diameter.

    So I'm guessing this is the wrong tube socket. Does anyone know where I could get a replacement for my 69 SuperPA?
     
  2. neikeel

    neikeel Well-Known Member

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    Show a pic of your existing ones you are matching to.
     
  3. RevJamie

    RevJamie Active Member

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    The one on the far left is the one that's not fitting.

    [​IMG]
     
  4. London John

    London John Active Member

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    I've probably got some old brown octals around. Will check, and if so I'll post.
     
  5. Micky

    Micky Well-Known Member VIP Member

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    You could bottom-mount it, or try to find an older period-correct NOS socket
     
  6. ampmadscientist

    ampmadscientist Well-Known Member

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    Start the reactor... Free Mars!
    The socket had the wrong measurement in the catalog...CED does this all the time.
    You have the wrong sized socket.

    I keep asking them to post better measurements and drawings.
    Vendors are not doing a very good job with measurements.
     
  7. neikeel

    neikeel Well-Known Member

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    I can help you out with a used one but you might prefer a new one the correct ones are the mcmurdo brown ones this guy in the UK has these:
    http://r.ebay.com/IYGuqT
    There is a guy in US selling them at a steeper price but obviously cheaper postage.
    They are good quality sockets and will last if not abused.
     
  8. RevJamie

    RevJamie Active Member

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    Hey Neil,
    I did a search on ebay for "McMurdo Octal Valve" but didn't see anything in the US. Do you have a link?
    Also, did you get my PM?
     
  9. RevJamie

    RevJamie Active Member

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    It won't mount from the bottom unfortunately.
     
  10. neikeel

    neikeel Well-Known Member

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  11. RevJamie

    RevJamie Active Member

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    No worries! Thanks for always helping me out! I've got the tube socket on order WOOT!
     
  12. danfrank

    danfrank Well-Known Member

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    $26 for a socket... Wow!
     
  13. Gunner64

    Gunner64 Well-Known Member Premium Member

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    Wow is right. Should be able to replace all the opt sockets for that.. If I wasn't trying to restore the amp to total collector stock condition, and it was just going to be a player I personally wouldn't pay that for one socket. I would replace them all with good quality, but maybe not period correct sockets..others may say blasphemy, but thats what I would do if it were mine..you may feel differently.
     
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  14. neikeel

    neikeel Well-Known Member

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    As I said steep price (certainly no affiliation on my part). I have bought ones from the UK seller which, whilst not cheap, are appropriate for my restoration purposes.

    The issue he has is having to file or Dremel the holes out to fit other sockets, which rarely looks good. Afraid I only have a quad of Ceramic versions and quad of Amphenols spare which look just like the ones in the pics. I have some vintage Cinches for pre 65 restos and a box of old phenolic sockets of different types that I would not trust. Also have a few 2-piece ceramic types that would almost certainly be good.
     
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  15. danfrank

    danfrank Well-Known Member

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    I'd get the used McMurdos that the UK seller is selling and clean them up myself. The sockets on the amp are "used" so adding a "new" one will look off. There's nothing wrong with the used ones that the UK guy is selling. They just need a little work done to them and they will be as good as the other 3 on the amp...

    Ooops they're different:

    https://www.ebay.co.uk/itm/Vintage-...m=172775836286&_trksid=p2047675.c100009.m1982

    Actually, the 2 for 10 pounds sockets linked above isn't too bad a price...
     
  16. coldengray

    coldengray Active Member VIP Member

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    2 for 10 pounds is a good price, most US sellers want $20-25 per socket, from what I've seen.
     

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