Viewing 8 posts - 1 through 8 (of 8 total)
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  • #18387
    Les Dickson
    CVRS Member

    I had to replace the volume pot on my Philco 64 and the shaft on the replacement isn’t long enough. Does anyone have some advice on how to extent this?

    Attachments:
    #18389
    Ralph Spracklin
    CVRS Member

    Hello Les

    If it were me I would cut the shaft and sand it clean. and coat it with flux. Then fabricate a collar/sleeve from a length of 3/8 copper tubing, slip it overboth pieces of shaft and adjust the shaft to proper length. If the fit is too loose cut a small piece from collar/sleeve length wise (ie from end to end. and using vice grips squeese it tightly, making certain that both pieces are straight and inline and solder it, as you would a copper pipe in plumbing. I’ve done this sort of thing often. How much too short is it? I’m assuming the shaft is steel, not aluminium. Stand chassis on end making the shaft parallel to the work bench. If your soldering iron or soldering gun is not hot enough to do the job, use a propane torch on low fire. Don’t burn the house down!

    Ralph

    #18390
    John Greenland
    CVRS Member

    Les,
    Send me an email and let me know which one you want and with your mailing address.
    No charge.
    They are both 1/4 inch inside measurement.
    Military polished steel.
    The short one is 3/4 inch long
    The longer one is longer !
    Just kidding – 1&1/2 inches
    2 set screws will be included
    Regards
    John G VO1 CAT

    Attachments:
    #18392
    Ralph Spracklin
    CVRS Member

    OK Les, I will send you an email

    Ralph

    #18393
    Ralph Spracklin
    CVRS Member

    Sorry about that, It was John you were asking for your address. Actually I like John’s fix better. I guess you will have to cut the shaft of the old potentiometer
    to the correct length and tighten up the coupler that John has suggested. Problem quickly solved.

    And John, where did you get those couplers? They are a handy thing to have. But sometimes you just have to make do, with what you have on hand.
    And as they say, “Where there’s a will there’s a way.”

    Ralph

    #18398
    John Greenland
    CVRS Member

    Ralph,
    Some people would call me a pack rat. Over the years I have always saved things that were salvaged from some piece of equipment that was not econmical to repair. These would have come from some thing with the pots well recessed from the front panle. I can not tell you where. I do have a couple of non conductive ones removed from an old scope, that had been dropped breaking the picture tube.
    Regards

    BTW, I have seen them on sale somewhere. If I think about where I will post a note.

    #18400
    Ralph Spracklin
    CVRS Member

    Hey John

    I made a coupler for my coil winder from a piece of hosehold shower hose using two small stainles steel clamps. It also acts as a flexible damper. And all at no cost, As I said, sometimes you have to make do with what you have on hand. As for the Pac Ratting, you are not alone, ask my wife.

    I just Goolged “Steel Shaft Couplers”, they are available on-line in more varities and sizes than the sands on the sea shore. “Grainger” sells then here in Canada, but Ithink they are Trade exclusive??? Copy and paste the following.
    Ralph

    https://www.grainger.ca/en/product/p/GGF6L012?cm_mmc=PPC:+Google+PLA&ef_id=CjwKCAjwopWSBhB6EiwAjxmqDUhuxVgXLLveQZ7rNfp91I36ajwbnyNYSUEvLsMEaMwUMETvk4tbhBoCs_QQAvD_BwE:G:s&s_kwcid=AL!3645!3!428123720819!!!g!1405289351725!&gclid=CjwKCAjwopWSBhB6EiwAjxmqDUhuxVgXLLveQZ7rNfp91I36ajwbnyNYSUEvLsMEaMwUMETvk4tbhBoCs_QQAvD_BwE&gclsrc=aw.ds

    #18401
    John Greenland
    CVRS Member

    Thanks Ralph,

    I was about to make similar comment about their availability.
    I have a couple of flexible ones as well as a couple that adapt a 1/4 in shaft to a 1/8 inch one.

    All the best

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