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148 chan mod

15minigrass

Active Member
Oct 30, 2006
915
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28
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need chan mod!!  which pin is #10. it says pull #10 to ground to get 64 upper chans.

got a pix of the bottom....trace side!!

IMG_2498.jpg
 

SPST switch mb8719 pins 11 & 12 to each other
SPST switch mb8719 pin 10 to ground
SPST switch mb8719 pin 9 to IC side of cut trace at pin 14

the 9 to 14 switch gets you .415-.445 on 37-40.

you'll need a road map, and a freq counter is a nice addition, but final coverage will be 26.815-28.085, completely. add 10kc switch, and slide mod of at least 5kc to get every single freq in there.
 

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  • @ heartbreaker3473:
    Hello gentlemen and Ladies. I have the dreaded RCI-2990 receive issue where my radio gets distorted when people get close to my location. I found the C90 Capacitor, but I can not for the life of me find the C89 capacitor. Can or does anyone have a picture of the exact location of C89 ? Thank you in advance, Wes
  • @ AudioShockwav:
    Wes, it's better if you start a thread on the main forum, more people are going to see your question.
  • @ heartbreaker3473:
    Okay, sorry, will put in a forum
  • @ heartbreaker3473:
    I put it in the general disscution help area and started a new thread. Thank you for letting me know.