Cobra 29 chrome talkback volume

[AA1QD]

Any one have a mod to make the TB louder on the newer chrome 29 that comes with variable talk back?

 

[doc919]

If you look behind where the mic side. Is on parts side of the board.r21/r77. Solder the tops of these two resistors together to give you a much louder talkback

 

[AA1QD]

If you look behind where the mic side. Is on parts side of the board.r21/r77. Solder the tops of these two resistors together to give you a much louder talkback

And will the variable still work?

 

[jessejamesdallas]

And will the variable still work?

It will still work just fine...Here is a link that you may find helpful.
http://cbtricks.com/radios/cobra/service_bulletins/graphics/tsb_10058.pdf

 

[AA1QD]

It will still work just fine...Here is a link that you may find helpful.
http://cbtricks.com/radios/cobra/service_bulletins/graphics/tsb_10058.pdf

Thank you, you were blowing smoke here on the east coast yesterday by the way!

 

[curlyjo]

Thanks for the good tip!

 

[AA1QD]

Works on the 29LX as well thanks

 

[doc919]

Same board & resistors.

 

[AA1QD]

I did notice after doing this mod, if you crank the talk back all the way up, the radio will lose some swing. I don't under stand why, unless running the talk back wide open causes a drop in voltage maybe?

 

[sonoma]

I did notice after doing this mod, if you crank the talk back all the way up, the radio will lose some swing. I don't under stand why, unless running the talk back wide open causes a drop in voltage maybe?

its robing audio from your output.

 

[sonoma]

here is a bulletin to increase talkback volume for this radio.

http://downloads.cobra.com/CB/TSB/TSB10058.pdf

 

[AA1QD]

Yes this is what I did. I don't remember the numbers now, but say it was swinging to 30, and when the tb is cranked all the way it will only swing to 25. In fact I injected a tone, and watched the meter as I turned up the talk back volume, as I turned it up the meter went down. No coincidence.