cobra 29 problem

kombat03 · Post by **kombat03** » Sunday 23rd Sep 2007, 10:34

I tried to do the roger bleep mod that is on this website. I couldn't get the mike to key so I made a jumper from tx in to tx out. During testing I by accident grounded out the cb I made to the case and blew the fuse. I couldn't get it to work so I took all it out. Now I get alot of static when keying to the mike and the dead key dropped to around 1 watt. Any idea what I burnt out? Thanks for any help in this. I checked for cold sockets where I soldered the mike connections.

ramblingman · Post by **ramblingman** » Sunday 23rd Sep 2007, 12:45

hi,,,when you key up the mic,,,does the light in the meter go dim...also does your tx and rx switching lights work properly..red tx light when keyed,,green rx light when in receive mode..

kombat03 · Post by **kombat03** » Monday 24th Sep 2007, 5:54

The lights do change from red to green when I key the mike. But the radio lights do dim a little when I key it. Thanks for any help with this problem.

kombat03 · Post by **kombat03** » Monday 24th Sep 2007, 12:24

I tested a brand new cobra 29 and the meter light dimmed the same amount as mine did.

ramblingman · Post by **ramblingman** » Tuesday 25th Sep 2007, 11:45

possibly shorted or open fet 1 and or fet 2..try lifting the collector of tr-13 and tr-11 and see if audio returns.