How to: Variable Dead Key Modification in Cobra 29! Super Loud!!
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- Опубліковано 19 жов 2024
- Quick video showing how I did the variable carrier/ dead key mod on a Cobra 29 CB Radio. If you want to increase the modulation, you can also increase VR4, but I don't suggest it. I personally don't like the loud distorted audio. But if you have to have it, try tweeking that one.
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Thanks, appreciate you showing us the process. secrets of the trade guys are annoying
IKR, I agree! You're welcome... 😀
I'd recommed a dual knob 50kohm pot. take out the volume pot and solder the volume and squelch wires to the dual pot so you'll free up a hole for your RF power
Awesome! Thanks for the input.. 😀
Buen vídeo saludos desde Creel Chihuahua México. 73
Gracias por compartir !.
¡Gracias por el gran comentario! ¡Saludos desde Fredericksburg, VA! 73 ... :-)
@@JLPicard440 exelente esquema yo soy novato y me ayudó de mucho
Felicitaciones!.
Saludos desde Creel la Sierra de Chihuahua
Tanks 73.... To distance!
@@davidaran2552 Awesome!.. :-)
I used to do a different version of the Super Mods..... I would take JP 36 out and put a 35V 35uf electrolytic cap in it's place, then bridge a 1 watt 56 ohm resistor across it, on the other side of the board... Then tune radio for max swing, my meter was very stingy, so it showed about 12 to 14 on the swing, while other meters showed 20 or more..... If my customer wanted a variable then I would use the SWR pot or add one to the bottom cover......Usually the SWR pot was being used for my Roger fart modification for different tones when the PTT was released.... Have a good one.....
Excellent.. thanks for the tip.. :-)
The JP 36 cap resistor mod is a trash mod the resistor gets smoking hot and all efficiency goes out the window.The tip 120 mod far superior .The transistor does not need to go to the heat sink.It barely gets warm.Just heat shrink and zip tie.For the swr cal to work properly you need to add a small vr trimmer to the cal wires and set it to cal at 4 watts or its not correct.
Thanks for the info... 😊
Hello how are you doing
Thank you for your support
Can I ship you a icom 706 mk2g for upgrades
HI, I appreciate that. I don't do that commercially...
Thank you so much
Great video new sub here
Thanks for the sub!
I can't find TIP 29s All I can find is TIP 29 C and I am not sure a @9 C will work
I think it will, but you should be able to google the specs on both and compare them.
My variable is choppy or jumpy. From 0 I start to turn it up and it jumps all the way to two. And when I turn it down it goes from one to 0 like jumps straight there. Whats going on?
It sounds to me like it's just dirty. You'll need one of those cans of component cleaner with the little red straw.. Try spraying some in the holes in the back of the control and rotate the control back and fourth as your spraying it.. should make a difference... Thanks...
Its brand new its not dirty...lol 2 different setups do the same thing
Well that's strange! It's acting like a dirty control. I'd still look at it.... it's acting like a bad one then... Did you do the mod and was it fine before the mod?
@@TINYNumismatics Hey Tiny good to see you in here....
Can you do mine and other work.
HI, I don't do this commercially. Thank you.
I wish I new ware you are at
USA.. 😀
Hi. Have a Cobra 29 LTD Chrome. I just bought it new recently. I am having trouble with excessive static. When I set the S/RF, SWR, Cal switch to calibrate my antenna there is still static coming through the speaker. Even with the mike keyed. My SWR reading is at 1 and the antenna red light is not on. Is it supposed to have static interference even while calibrating the antenna?
Yes, when you switch it to swr cal, and hit the tx push to talk on the mic, it's supposed to transmit. Then your supposed to rotate the cal knob until the meter reads cal at the end of the scale. Then switch the switch to swr to see what the swr is. But you should not be hearing static when the mic is keyed since it's in transmit, and of course the red light should come on. Does it transmit fine when in S/RF mode? Do you have a antenna analyzer to see if the antenna is working right? OR a dummy load? to see if the radio still has the problem when connected to dummy load?
Would you be willing to do that mod for me , for a charge of course ? I dont have the radio yet but am planning to get one soon , An wanna be able to run a amp with it . Thanks
HI Tim... I don't take radios in for repair.
@@JLPicard440 this wouldnt be a repair just the mod u did . but anyways i understand :)
Timmy Gilbert Yes I misused the word repair... sorry about that
@@JLPicard440 No problem , lol . Thanks for the replies . Take care .
I have the swing mod I want to reduce max watts out
The swing mod affects the dead key, not sure about max watts out.
This is a hack mod at its finest, perform this at your own risk… I have been a radio tech of 22+ years and don’t recommend this variable power and swing kit what so ever! 73
It works.. you have a different method and that's your opinion. Thank you.
7351 friend Cobra 148 mod
I don't have one available to me.