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question on a mod

1iwilly

Sr. Member
Dec 7, 2008
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has anyone done the c109 mod to the 148 gtl& 2000 gtl do you keep the same value 10uf and add a resistor or do you just lower the value
to have a better/faster amc respond thanks
 

Caps charge rates take longer when you go higher in value of C109 but use a resistor to bleed off power that when it rises, so when the ALC/AMC clamping occurs that charge needs to be removed - value changes, alter the effects C109 has - you'll have to experiment - check your PM because this combined with other mods makes the AMC section pretty unstable.

R161, a 10K, uses R127 to pull off (turn down or buffer) ALC's aggressive behavior - Changing R127 affects AMC and ALC.

C109 effectiveness is altered as well.

So use discretion.
 
Caps charge rates take longer when you go higher in value of C109 but use a resistor to bleed off power that when it rises, so when the ALC/AMC clamping occurs that charge needs to be removed - value changes, alter the effects C109 has - you'll have to experiment - check your PM because this combined with other mods makes the AMC section pretty unstable.

R161, a 10K, uses R127 to pull off (turn down or buffer) ALC's aggressive behavior - Changing R127 affects AMC and ALC.

C109 effectiveness is altered as well.

So use discretion.
thanks, andy
 

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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.