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Workman-like make of valve/tube sockets?

Discussion in 'Electronic Repair' started by N_Cook, Mar 1, 2013.

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  1. N_Cook

    N_Cook Guest

    That last more than 5 years before the gap in the socket pin opens up enough
    to break contact on the grid pin?
    octal EL34 type valves seem to have pins about 2.2/2.3 mm diameter. Failing
    socket pins , measured cold , a gap in the Y as large as 2.1mm.
    Luckily I've found a NOS McMurdo , British made socket that I will rob 4 of
    the pins from, for the 4 grids, as physically compatible in the base matrix.
    These unused ones measure 1.7/1.8mm in the active part of the Y gap.
    The failed ones from 2007 have reduced metal in the region where its
    required , the 2 prongs , except for a swelling at the contact point ,
    measure in cross-section .7x.9mm down to the 2to1 middle of the pin . The
    older ones measure .55 x 1.4mm , the 1.4mm dimension in the sense that you
    want it , for long-term/hot-cold cycling strength.
    Any modern makes have engineering drawings disclosing these pin dimensions ?
    has the metal composition changed/ trade secret formulation lost?
     
  2. Baron

    Baron Guest

    N_Cook Inscribed thus:
    Didn't you see my post a while ago where I said I had found a brand new
    pack of five !
     
  3. N_Cook

    N_Cook Guest

    A sustainable source of robust sockets?

    Or even a source of pins of part spiral type perhaps , scaled up to 2mm of
    turned pin socket type say or even scaled up QM. I've only once come across
    bent pins on octal valves (owner bent them for easier access) . Just to
    replace the grid pins of modern sockets, if not the remainder.
    What else uese 2 to2.2mm size pins these days that has mating sockets?
     
  4. N_Cook

    N_Cook Guest

    all the octal relay bases I've laying around have the simple Y fork type of
    pin and they may not be suitable for high temperature use. I did find some
    more NOS octal valve bases mixed in with them though
     
  5. Baron

    Baron Guest

    N_Cook Inscribed thus:
    I'll mail you.
     
  6. Wond

    Wond Guest

    It occurs to me, Heathkit gear used good quality components, mounted
    with nuts and bolts. Lots of good hardware there, if you can find it.
     
  7. Baron

    Baron Guest

    Baron Inscribed thus:
    Did you get my Email ?
     
  8. N_Cook

    N_Cook Guest


    Ignore any unmunged email addresses you find on Usenet, a matter of putting
    any apparent such adresses in Google for references to related proper
    addresses
     
  9. Baron

    Baron Guest

    N_Cook Inscribed thus:
    In that case, my addy is good !
     
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