Help with TR-751A Vol/SQL control

Discussion in 'General Technical Questions and Answers' started by KE6YMA, Nov 7, 2017.

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  1. KE6YMA

    KE6YMA Ham Member QRZ Page

    Hello, I have just bought a Kenwood TR-751A 2 meter and the Volume/Squelch knob in Volume cuts in/Out and the Squelch never breaks to static.
    I've pulled the potentiometer Out of the unit but looks like I'll distroy it attempting to repair it.
    Anybody know of a good solid repair or somewhere I can send it.
     
  2. W1VT

    W1VT Ham Member QRZ Page

    Last edited: Nov 7, 2017
  3. N5MOA

    N5MOA Subscriber QRZ Page

    The replacements from rrcom, I forget the p.n., work. You will need to tweak the legs a bit to fit on the board.

    And it will be twist on/off, not push like the original.
     
  4. KA9JLM

    KA9JLM Ham Member QRZ Page

    I would try to stand it on end and apply alcohol to the control shaft, Rotate it so the alcohol gets to the carbon.

    I have done this and it can work, With nothing to lose, Unless you use Everclear. :oops:

    Good Luck.
     
  5. W9GB

    W9GB Ham Member QRZ Page

    ALPS was the OEM supplier of this Dual-unit potentiometer.
    The original model is likely discontinued, but you can check current production models.
    http://www.alps.com/prod/info/E/HTM...otentiometers/RotaryPotentiometers_list1.html

    STATE Electronics, contact Thomas Sutcliffe for potential replacements / substitutions.
    http://potentiometers.com/

    Mod-Pot SERIES OPTIONS
    http://potentiometers.com/PDF/ModPotSelector.pdf

    STATE ELECTRONICS PARTS CORP

    36 STATE ROUTE 10 STE 6
    PO BOX 436
    EAST HANOVER NJ 07936-0436
    (800) 631-8083
    Local: (973) 887-2550
    Fax: (973) 887-1940
     
    Last edited: Nov 8, 2017
  6. KE6YMA

    KE6YMA Ham Member QRZ Page

     
  7. KE6YMA

    KE6YMA Ham Member QRZ Page

    Thanks Everyone,
    Great info
    Gary
    Ke6yma
     
  8. W9GB

    W9GB Ham Member QRZ Page

  9. AA3EE

    AA3EE Ham Member QRZ Page

    One of the guys on a microwave related mailing list has detailed how he's been trying to salvage the original pot. I think the problem, once you disassemble it by drilling out the tiny rivets, is finding something to hold it back together.
    GL
    Dave AA3EE
     
  10. KA9JLM

    KA9JLM Ham Member QRZ Page

    I would just replace it if has been removed.

    Yes that can be done, I have done it. But cleaning can be done without disassembly.
     

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