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2SB824 replacement.

Discussion in 'General CB Services Discussion' started by Low_Boy, May 26, 2018.

  1. Low_Boy

    Low_Boy Well-Known Member

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    I have a few ideas but I may be wrong. What would be a good replacement part for a 2SB824?


     

  2. Ranch55

    Ranch55 Well-Known Member

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    2SB817 is a little more robust .....
    Palomar MAX MOD is even better ....... a little bigger in physical size, but is a drop in replacement. Will have to drill a new mounting hole 1/4" ~ 5/16" higher in the chassis, but is very good upgrade ......
     
  3. sp5it

    sp5it Master of puppets

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    BD249C
     
  4. Low_Boy

    Low_Boy Well-Known Member

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    Thanks guys. I need something in a TO220 size.
     
  5. Handy Andy

    Handy Andy Do Your Research First, Then Decide...

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    You know people are making a killing off of us...

    People have known about the darlington for a while now.

    SIGH
     
  6. Handy Andy

    Handy Andy Do Your Research First, Then Decide...

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    2SB817 is TO3 P - flat pack package - all listed above are size equivalents.

    Else 2SA1012 converts to 2SB826 PNP 12A

    The TO-220 has the power wattage dissipation limitation.
     
  7. sp5it

    sp5it Master of puppets

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    BD912 than. 100V 15A, plenty of room :)
    Mike
     
  8. Low_Boy

    Low_Boy Well-Known Member

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    Thanks mike that sounds better. This is a part I never delt with before. And my choises would have been wrong. Glad I asked.

    Andy the smaller replacements are a lot less robust.:)
     
  9. Handy Andy

    Handy Andy Do Your Research First, Then Decide...

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    I hear ya!

    Was just saying the TO-220 types have only so much wattage they can dissipate - the TO-3P and the 247 styles have the bigger die surface area to drain off the heat.

    The problem is with the radio - not the part = the size needed to upgrade versus the amount of room the radio actually has for that.

    A TO3-P Flat pack is a big transistor - can't squeeze them in too well on a PC-122. At least not without several extensions ...

    Hey, as long as you got room!

    :+> Andy <+:
     
  10. Low_Boy

    Low_Boy Well-Known Member

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    Yes Andy this is a Realistic TRC-485 almost the same as a PC-122
     
  11. Handy Andy

    Handy Andy Do Your Research First, Then Decide...

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    TRC-485 - you sly devil you...(y)

    I hope you can get it to fit...

    (Why not run the RWOB)

    :+> Andy <+:
     
  12. sunbulls

    sunbulls Well-Known Member

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    Hopefully you can make it fit without drilling an additional mounting hole. I hate the process of cleaning up all the metal debris scattered about the radio. If it’s steel, try placing a powerful magnet close to the drill bit. My favorite magnet for that purpose can be found inside a bad hard drive. Those extremely powerful flat magnets are also great for finding embedded stud screws in your drywall.
     
  13. nomadradio

    nomadradio Analog Retentive

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    We use type TIP42C. The suffix letter "C" only indicates the circuit voltage it will handle. Any version from "TIP42" without a suffix letter, the "A" and "B" versions should perform the same in a 12-Volt radio.

    73
     
  14. Low_Boy

    Low_Boy Well-Known Member

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    Sunbulls... A saw a video today how a guy used the same magnet under a roof panel to mount a magnetic antenna on a ford aluminum cab pick up.

    I use a whitney punch. but am putting in a BD912 in this.
     
  15. Low_Boy

    Low_Boy Well-Known Member

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    Nomad I knew there was a TIP number that would fit. I used one once before and was sure I had notes on it in my Realistic file but somehow could not find the notes. Thank You.
     

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