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MOSFET conversions for upD858 and MB8719 boards

Discussion in 'General CB Services Discussion' started by ExitThirteen, Mar 10, 2011.

  1. psycho

    psycho Running a special on our rooms!

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    Not a problem....I bought 6 new 1969s 1 year ago. It's hard to blow a 1969 unless someone running a 1000 watts keys up right next to you.


     

  2. Robb

    Robb Yup

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  3. liquidh8

    liquidh8 Active Member

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    Bump just because we are still waiting on pictures! lol :redface:
     
  4. TIN_CAN

    TIN_CAN Active Member

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    Same write up to the T that RadioNut from the east coast of Canada did...so who did this???

    MOSFET conversions for upD858 - UPDATED

     
  5. Zman

    Zman K9FON

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    Just like tubes the transistors are going the way of the dinosaur. Either get used to the new mosfets and SMT or get out of the hobby.
     
  6. Zman

    Zman K9FON

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    Thats what you will be saying when you can no longer get ANY 1969s, 1307s, 2166, 2312, ect ect....... Youll be saying poo poo on the old finals!
     
  7. psycho

    psycho Running a special on our rooms!

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    Mosfets are transistors.
    I have 6 1307s, 6 1969s, and 7 2166s that I bought from RF parts a quite a few years ago. POO POO on mosfets.
    I will try that mosfet conversion with a beat up but damn good working Cobra 148 I bought on craigslist.
     
  8. Zman

    Zman K9FON

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    This is a cool mod. I did it in my TRC 449 and im getting 25 PEP on AM and about 30 or so on SSB... Im going to do it to my TRC 458 and Cobra 139 both of which have bad finals.
     
  9. 9C1Driver

    9C1Driver Sr. Member

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    I think it's nice to have this option for a broken radio. That said if your radio is working fine there is no point doing the mosfet conversion. Good to keep in mind if something goes wrong down the road.
     
  10. ExitThirteen

    ExitThirteen Grumpy and Cranky

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    You nailed it. That's why I posted this, it gives people another option. I did the MOSFET mod on my President Washington (D858) because at the time, I didn't have any spare C1307's. I have several C1307's now, but since the mod is still 100% functional in my Washington, I never bothered to change it back to run the C1307 final.

    Tin Can, that mod that you posted came from me. Someone copied it and reposted it on a different website. :)


    ~Cheers~
     
  11. unit_399

    unit_399 EL CAPO

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    Hey Thirteen -

    Did you ever get the C1306 driver to Mosfet conversion worked out ?? Just wondering.73s.

    - 399
     
  12. ExitThirteen

    ExitThirteen Grumpy and Cranky

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    Sadly, no... I haven't had a lot of free time as of late, been working 7 days a week... it's the new work week these days in my profession. :(


    ~Cheers~
     
  13. unit_399

    unit_399 EL CAPO

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  14. Zman

    Zman K9FON

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    REAL (NOT FAKE!) 1307 finals are too hard to come by so this is a great conversion!!!!
     
  15. Zman

    Zman K9FON

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    I recently tried this mod in my Cobra 148 GTL old style and immediately fried the final choke as soon as i hooked the radio to the 12 volt power cord....
     

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