Home › Forums › Electronics Restoration › Hallicrafters TW600 dial cord issue

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  • October 27, 2014 at 7:18 am #6191
    Peter Heembrock
    Forum Participant

    I an working on a TW600 set with the early version of the dial string routing ( only two pulleys compared to the new version which has 3 pulleys ). The original dial seems ok and it taught however it slips on the tuning shaft when tuning up the band…tuning down seems ok…the tuning shaft seems to be quite polished from the dial cord slipping all of the time.

    Is this something to do with the older version only having 2 pulleys vs the 3 on the newer version? There seems to be a lot of tension on the tuning condenser when turning it clockwise ( tuning up the band ).

    Would replacing the cord with new stock fix the problem…has anyone had this problem before with old dial cord?

    November 3, 2014 at 10:39 am #6200
    phil
    Forum Participant

    not sure on this particular model but have heard say they had success with a bit of violin rosin on the cord to prevent slippage.

    November 4, 2014 at 6:46 am #6204
    Peter Heembrock
    Forum Participant

    Another thing that worked quite well here was some old wax scraped off of some discarded wax/paper capacitors ( Thanks Dan ).
    I applied a generous amount of the wax to the brass shaft where the dial cord was slipping…problem solved. Capacitors where the wax is still sticky is best…
    Based on these results the violin rosin would work as well as a similar solution.

    December 20, 2014 at 10:46 pm #6345
    Gary Albach
    Keymaster

    Hi Peter – didn’t see your post until now but it looks like you’ve discovered a common problem with Hallicrafters portables, my friend. I had the same problem when restoring a TW-2000 last winter, the dial cord was tight but slipped when tuning upscale. A new dial cord didn’t help in my case. Folks use rosin, wax paper cups, Pliobond, and and a host of other stuff, but, like you, I found that wax from an old paper capacitor works great. And is always available. I cut the wire off one end of the cap and apply the wax directly to the length of the dial cord like a piece of chalk. Wonder how it would work on violin strings?
    Gary

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