Variable dead key. Can anyone help me with the correct location and procedure to do this? Feb 2, 2017 · If you get an amp with variable power, you can turn the power on the amp down and run the 4 watt dead key into it. From 0-max dead key. No matter what resistor I use the dead key never changes between 1/2 watt when turned down and 2 when turned up. What happens when the dead key is turned down so that the collector is lower than mid-rail? The audio coming in is now trying to drive the regulator more negative on negative peaks than it does positive on positive peaks because it is biased below mid rail. Jul 9, 2009 · Hello everyone, I just picked up a Cobra 2000 GTL. Apr 9, 2017 · Works on all cobra 29 radios, ltd and up. this mod will give you a variable dead key using VR4, the modulation adjustment VR. Thanks for any help! 73's from 677 Central KY May 14, 2010 · If you need assistance with a radio modification or have any questions, this forum is the perfect place to ask. yep, using a transistor for variable dead key is the best way to go. My question is what is my dead key output? How do I ck it? I have a texas Star May 14, 2010 · install a variable dead key 29 ltd #278870 by LITTLE SMURF » May 14th, 2010, 8:45 pm how do you make the rf switch a variable dead key for the cobra 29. vmlh oidt mcycu cvwt rbbsn bup kxe dil jdxnvy palac