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Carbon composition resistors

Discussion in 'Electronic Design' started by ChrisGibboGibson, Nov 7, 2004.

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  1. As a result of being a bit sad, and having not much better to do, I have just
    totally renovated a vintage radio. As far as possible back to original
    condition.

    The one exception being a metal film 33K R stuck in there that now looks
    totally out of place.

    It should, of course, be carbon composition. Anyone got any?

    Gibbo
     
  2. Clarence

    Clarence Guest

    Value? Wattage?
     
  3. I told you your newsreader was broke!

    33k, it says so in the above post. As for wattage, I dunno, the normal size
    ones!

    I'd guess they'll be 0.25 watt (ish)

    Gibbo
     
  4. john jardine

    john jardine Guest

    Tomorrow, I'll rummage the spares. They'll be though ceramic cased 1940's
    style and not the 1930's and 1920's variety. Would they do?.
    regards
    john
     
  5. Rich Grise

    Rich Grise Guest

    Just carve a little bakelite sleeve, and paint the color bands on it.
    Seal up the ends with Plastic Wood. ;-)

    For that matter, it might even look more authentic if you molded
    a little body out of Plastic Wood, although you'd need to stain it.

    Cheers!
    Rich
     
  6. Pooh Bear

    Pooh Bear Guest

    Tried excavating any ancient landfill ?


    Graham
     
  7. :

    [snip]
    Yes those would be fine. Thanks

    Gibbo
     
  8. I'm sure I either have one or can get one from a vintage radio
    enthusiast friend of mine. If you get stuck, lemme know.
     
  9. John Fields

    John Fields Guest

     
  10. Tam/WB2TT

    Tam/WB2TT Guest

    You might mention whether the other resistors have radial or axial leads. A
    1/2W axial lead should be available anywhere, for less than the cost of
    postage. An old radio I had, though, had radial lead resistors.

    Tam
     
  11. john jardine

    john jardine Guest

    I've found a couple. Send me your address and I'll post 'em down.
    regards
    john
     
  12. Paul Burke

    Paul Burke Guest

    A vintage Citroen fanatic friend tells me that this is actually done
    with the old wax capacitors- no, condensers- in early car radios. Take
    the end off, hollow out the foil inside, attach a small modern capacitor
    to the leads, seal the end back on.

    Paul Burke
     
  13. Thanks everyone for the offers.

    I have some on the way.

    Gibbo
     
  14. Tim Shoppa

    Tim Shoppa Guest

    A couple distributors still list carbon comp resistors in their
    catalogs. For example, Allied and Digikey list
    Ohmite OD (1/4 W), OF (1/2W), and OA (1W) series resistors at
    fifty cents to two dollars each! That's right, not fifty cents
    per hundred, but fifty cents each, and there's not much discount
    for buying by the hundred.

    These are almost certainly cylindrical brown parts, which may or may
    not match the rest of the parts in your radio.

    Tim.
     
  15. N. Thornton

    N. Thornton Guest

    Might be best to give us a pic next time of the other Rs in there,
    otherwise we dont know what period you want. 20s, 40s, 60s, all very
    different.

    I imagine it might also be poss to drill out the original fried R and
    use it as a sleeve over a modern replacement. But the R body would be
    very fragile I expect.


    NT
     
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