Delco DS-501 Transistor ?

Discussion in 'Electronic Components' started by pgtr, Nov 15, 2004.

  1. pgtr

    pgtr Guest

    Anybody heard of this transistor or know if there is an equivalent
    available?

    I have an old (early 1970s) GM car radio/stereo that uses an external
    'convector' (which I do not have) - it should be a large external
    heatsink w/ two(2) DS-501 transistors on it is all. I wonder if I can
    fabricate an equivalent unit out of modern items? I'm guessing all I
    need is a pair of large Delco DS-501 transistors (or modern equiv?)
    mounted to a large externally mounted heatsink and 6 wires (3 for each
    transistor) going to the radio unit.

    I have access to one such 'convector' I can inspect. The radio works
    fine w/ the 'borrowed' convector.
    pgtr, Nov 15, 2004
    #1
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  2. On Mon, 15 Nov 2004 02:00:35 -0600, pgtr
    <pgtr@(changesomething}bigfoot..com> wrote:

    I understand that the 2N235A is equivalent to the DS501, but probably
    not now easy to directly replace.
    2n235A is a TO3 case Germanium PNP power transistor.
    Ic max 3 amp,
    Ib max 150ma,
    BV(cbo) = 50 volt
    With Ic=500mA hfe=40

    >Anybody heard of this transistor or know if there is an equivalent
    >available?
    >
    >I have an old (early 1970s) GM car radio/stereo that uses an external
    >'convector' (which I do not have) - it should be a large external
    >heatsink w/ two(2) DS-501 transistors on it is all. I wonder if I can
    >fabricate an equivalent unit out of modern items? I'm guessing all I
    >need is a pair of large Delco DS-501 transistors (or modern equiv?)
    >mounted to a large externally mounted heatsink and 6 wires (3 for each
    >transistor) going to the radio unit.
    >
    >I have access to one such 'convector' I can inspect. The radio works
    >fine w/ the 'borrowed' convector.
    Peter Dettmann, Nov 16, 2004
    #2
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  3. "pgtr" <pgtr@(changesomething}bigfoot..com> wrote in message
    news:...
    > Anybody heard of this transistor or know if there is an equivalent
    > available?
    >
    > I have an old (early 1970s) GM car radio/stereo that uses an external
    > 'convector' (which I do not have) - it should be a large external
    > heatsink w/ two(2) DS-501 transistors on it is all. I wonder if I can
    > fabricate an equivalent unit out of modern items? I'm guessing all I
    > need is a pair of large Delco DS-501 transistors (or modern equiv?)
    > mounted to a large externally mounted heatsink and 6 wires (3 for each
    > transistor) going to the radio unit.
    >
    > I have access to one such 'convector' I can inspect. The radio works
    > fine w/ the 'borrowed' convector.


    Are you sure you don't mean 'convertor'?

    The NTE (paper) crossref and catalog gives the sub for DS-501 as NTE105.
    Find out more at www.nteinc.com.
    Watson A.Name - \Watt Sun, the Dark Remover\, Nov 18, 2004
    #3
  4. "Peter Dettmann" <> wrote in message
    news:...
    > On Mon, 15 Nov 2004 02:00:35 -0600, pgtr
    > <pgtr@(changesomething}bigfoot..com> wrote:
    >
    > I understand that the 2N235A is equivalent to the DS501, but probably
    > not now easy to directly replace.
    > 2n235A is a TO3 case Germanium PNP power transistor.
    > Ic max 3 amp,
    > Ib max 150ma,
    > BV(cbo) = 50 volt
    > With Ic=500mA hfe=40


    The Delco DS-501 is in the big TO-36 doorknob package, and can dissipate
    150 Watts, much greater than the 2N235A.

    > >Anybody heard of this transistor or know if there is an equivalent
    > >available?
    > >
    > >I have an old (early 1970s) GM car radio/stereo that uses an external
    > >'convector' (which I do not have) - it should be a large external
    > >heatsink w/ two(2) DS-501 transistors on it is all. I wonder if I can
    > >fabricate an equivalent unit out of modern items? I'm guessing all I
    > >need is a pair of large Delco DS-501 transistors (or modern equiv?)
    > >mounted to a large externally mounted heatsink and 6 wires (3 for

    each
    > >transistor) going to the radio unit.
    > >
    > >I have access to one such 'convector' I can inspect. The radio works
    > >fine w/ the 'borrowed' convector.

    >
    Watson A.Name - \Watt Sun, the Dark Remover\, Nov 18, 2004
    #4
  5. pgtr

    pgtr Guest

    On Wed, 17 Nov 2004 19:59:50 -0800, "Watson A.Name - \"Watt Sun, the
    Dark Remover\"" <> wrote:
    >
    >> I have access to one such 'convector' I can inspect. The radio works
    >> fine w/ the 'borrowed' convector.

    >
    >Are you sure you don't mean 'convertor'?



    Actually I don't know. The General Motors Manual (for the car, not the
    radio or stereo) calls it a "convector" for a mono radio and an
    "adapter" for a stereo radio.

    The difference between these two parts is size of the aluminum heat
    sink and one or two DS-501s. The stereo version is twice the size of
    alum sink and a pair of DS501s and the mono radio has only a single
    DS501 on it's smaller heat sink. (basically cut it in half) The
    harness connecting the two is 6 wires or 3 wires respectively.

    In radio or electronics parlance not sure what I'd call it. Heat Sink
    w/ 'driver' transisters for the amp I'd guess at describing it as.

    Here's some images front and back of a stereo version. There is a 6
    wire connector and the brown discs on the bottom are caps:
    http://www.photohost.org/gallery/data/501/5632converter1.JPG
    http://www.photohost.org/gallery/data/501/5632converter2.JPG

    >The NTE (paper) crossref and catalog gives the sub for DS-501 as NTE105.
    >Find out more at www.nteinc.com.


    Thanks! I've already bookmarked that site and finding all kinds of
    useful info in addition to this!
    pgtr, Nov 18, 2004
    #5
  6. pgtr

    Luddite Guest

    pgtr <pgtr@(changesomething}bigfoot..com> wrote:
    > Anybody heard of this transistor or know if there is an equivalent
    > available?


    > I have an old (early 1970s) GM car radio/stereo that uses an external
    > 'convector' (which I do not have) - it should be a large external
    > heatsink w/ two(2) DS-501 transistors on it is all. I wonder if I can
    > fabricate an equivalent unit out of modern items? I'm guessing all I
    > need is a pair of large Delco DS-501 transistors (or modern equiv?)
    > mounted to a large externally mounted heatsink and 6 wires (3 for each
    > transistor) going to the radio unit.


    I have two pairs of those and some delco 2n277's as well,make an offer


    > I have access to one such 'convector' I can inspect. The radio works
    > fine w/ the 'borrowed' convector.
    Luddite, Nov 23, 2004
    #6
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