cobra 29 poor tune up results?

[mattposter]

I have run across a few cobra 29 that give me a poor power output after a peak and tune. I can not get the modulation to increase at all. I have a mod of adding a resistor in a certain spot, and I have also tries clipping the limiter, only to see if I can get any increase, I know clipping the limiter is the wrong way. I get no increase even when I clip the limiter. The modulation pot does adjust it so I would think all is working right. On the scope it only goes as high as a stock 29 no matter what I've tried. Any help would be great. Thanks

 

[RatsoW8]

Why not buy yourself a small amp rather than hack up the radio?

 

[Mustang 131]

You have to be doing more then 90% modulation for the amc to kick in. Carrier too high..what happens at 2 watts? Poor tune or issue with audio. 29's will do 120% with a power mic.

 

[mattposter]

I'm not hacking up the radio... there are ways of modifying without hacking. Minor modifications to circuitry to get the most out of it verses removing components or completely changing a circuit are bad ideas.

 

[medic18d]

no dis respect, but i would never run a radio with a limiter clipped ..
spend a few bucks and send it in to a man that feeds his family from tuning radios ..
i know i could slightly tune my radio but i like to sound good and not plague the airways with harmonics .
hope you figure it out

 

[Robb]

The 'typical' mod for a 29 is to put a cap and a resistor in it, peak the TX coils, and adjust the modulation so that it doesn't square wave on a scope.

 

[Sideways]

Kind of hard to offer any help without specifics. You "add a resistor in a certain spot" Where? What value? What is your carrier and peak wattage?
You said your having trouble with a few 29's, has this mod worked on others?
Not trying to hash on you, just need a lil more info so we can help