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Tubular ceramic cap, silver migration?

Discussion in 'Electronic Repair' started by N_Cook, Jul 4, 2013.

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  1. N_Cook

    N_Cook Guest

    Got inside this audio Low Pass Filter block, after desoldering the
    associated IC but problem was an ohmic cap,1.5mm diam x 5mm, in the
    base/former of one o fthe Tx.
    Originaly measuring about 400 to 500R, now after desoldering, about 1000R
    I had removed the cap, decided to lightly sandpaper the ends of the tube
    assuming the migration over the end surfaces and placed it in my usual
    place for such tiny items to pick up the DVM. But with my turning, there
    was some of that near invisible spider-silk hot melt fibre I had
    unknowingly on me from the previous job and that must have flicked the
    cap off to the devil-knows-where. Didn't get to RLC measure the cap either.
    Otherwise symetrical coils in there and other cap is 3.4nF and the first
    scrap coil I come across also had 3.3nF tiny tubular in it , so that
    will go in there.
    So anyone been here before , and end abraiding would have been all that
    is required to reuse?, and more generally with such narrow dimension
    high capacity caps for reuse, would routine pre-emptive abraiding the
    ends always make sense
    LPF green plastic casing with 2 transformers inside marked
    061-01
    8NIV
    should anyone have data on such

    ps
    a lid for my small parts , under review tray, premptive action also
     
  2. N_Cook

    N_Cook Guest

    back in working order, not tried it with analyser proper, but no audible
    difference to L and R tracks rec/playback for 3 spot frequencies, Dolby
    in or out. Strobing to the capstan only needed about 3% adjustment
    probably more for age than different bands. 4 pulley tyres needed
    replacing also
     
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