Cobra 21X 23 Channel Mobile? Dual Final??

[broncoman529]

I have a question, I was looking inside my Cobra 21X 23 Channel radio and it looks like it has dual finals. Here is the scoop, On the rear left of the radio attached to an aluminum plate is two NEC C1096/L264C transistors. The transistors were covered with white heatsink compound and I had to clean it off the front of the transistors to identify them, I would not think Cobra would have left a mess like that stock. They also had blue lines across the aluminum tab that screws to the heatsink. I wouldn't think this is stock either. On the right side of the radio is another aluminum plate with one C2029/1 and one smaller C2028/2 both on the same plate. So in all I see 4 transistors in the radio that are attached to heatsinks with compound. I think the one on the side is the audio section. All of the "Cans" have red lines marked across them like someone wanted to remember where they were originally set. Can anyone tell me if it is a dual final radio and what should I expect for output from these transistors. I have never seen a radio set up this way. She sure is a screamer though.

Thanks,

 

[Hardhead]

Those are not the stock finals.
The stock one is a 2sc765 single final.
That is not to say that they haven't been changed.
They may very well be the finals that someone has installed.

 

[Flatland Radio]

The 1096 transistors you see in that radio are the audio transistors.This radio came out just before audio ICs (integrated circuits) became widely used.

All in all these werent bad radios, great recieve and a uniden chassis.

 

[DTB Radio]

The final is a round device mounted on a heatsink along the right side of the board, about 3/4 of the way back. It is mounted more-or-less fluch on the board, not upright as with modern CB finals. The final in the unit you have will remind you (remotely) of an amp pill thats metal instead of the usual white casing.

 

[351_bear]

21 xlr

excellent radio great audio does anyone know what the channel mod is for this radio

 

[TalkingTall]

Good little radio.Great audio without even messing with them. I have one that I ran for years and I hate to part with it, so its just sitting here.I have read that some of them have the 858 chip in them. I never even opened mine up to see...

 

[Ay589]

10 years later and off topic but Ive got a cobra 19 gtl with the 2028 infront of a c2029/1 final. The final transistor 2029 is smoked, only info I see on the web is the nte235 but not sure if thats correct or not. Any info would be appreciated

 

[nomadradio]

The NTE235 is a substitute for nearly a dozen AM-CB final transistors. If you have a printed copy of the cross-reference, have a look at the page where this final is listed and you'll see all the different types for which they claim it will work.

And that's what it is, a substitute. Other suitable substitutes include 2SC1306, 2SC2166, 2SC1975, 2SC1678, 2SC2078, and a few others that I just can't remember right now.

73

 

[Ay589]

Thank you, big help! I have a few parts radios with 2078's so that'll work. Research is tough currently, doing all of my research and schematic work off an iphone, no computer around (spending too much on radio stuff instead) lol