Old Tri-Delta board

Discussion in 'FAQs' started by felliott, Jul 12, 2005.

  1. felliott

    felliott New Member

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    Found half dozen old circuit boards chock full of resistrors and ten connector
    poles for wiring. Boards are Tri Delta D-2. Must have something to do with old HO systems..for powering something. Anybody got an idea. Board has a metal flat bar about 3/4" X 4" with two round metal devises wired into the cicuit. The center of this has a # IN3491 7844.
  2. MasonJar

    MasonJar It's not rocket surgery

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    Hi Felliott...

    I don't have an answer for you, but if you'd like I will move your post to the Technical Q&A section where you might get a better response...

    Andrew
    Moderator
  3. felliott

    felliott New Member

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    TR D Circuit Boards

    Andrew-Thanks. My pleasure to have u place the query in the

    TECH section. AM busy putting finishing touches on LOWER section of

    My layout and "rediscovering" so much that I have forgotten. Both frustrating

    and delightful. Want to be sure all conmnections etc are tight---the insulated

    rail connectors in place-and now beginning to set ? in place some old NJ Twin C

    coil switch machines. After 25 years they still throw with real power! Again

    THANKS
  4. MasonJar

    MasonJar It's not rocket surgery

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    Done...!

    Welcome back to the hobby, and welcome to The Gauge.

    Don, maybe you can shed some light on this... ;)

    Andrew
  5. ezdays

    ezdays Out AZ way

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    I can't help too much. The 1N3491 is a general purpose, high current diode. The 7844 is probably the date code, manufacted in the 44th week of 1978 making this assembly kinda old. I have no clue as to who Tri-delta is. Possibly a picture would help (front and back), but it just sounds like maybe something to do with a lighting or power distribution circuit.
  6. N Gauger

    N Gauger 1:20.3 Train Addict

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    Don - I was going to "guess" the old "Wire Wrap terminal boards... But a Picture would be great!!

    Welcome Aboard, Felliott!! :D :D
  7. ezdays

    ezdays Out AZ way

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    Mikey,

    The resistors and diode kinda make it more specific. I'd know a bit more if I could have the color code and see a picture of the resistors. The two diodes gives me the idea that they are isolating two power circuits.

    The fact that the board is so old may be a clue as to why I can't find any information on the company.
  8. N Gauger

    N Gauger 1:20.3 Train Addict

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    Oh ok - very good :) :) :) Now we have a mystery to solve :D :D :D :D

    Best of Luck, Sir! :D :D :wave: :wave: :wave: :wave:
  9. jim currie

    jim currie Active Member

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    don't know if this is it but Marklin had a line of decoders call delta.