Cbtricks cobra 25

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Thread Starter Dr. It's the pretties unit but it will work as my personal back up unit for work. I already have several parts coming but I don't have a mic or antenna to test with and will have to figure something out.

Also is there anyone who knows these units or atleast common weak points??? Oh is there any possible way we could discuss modifications to the unit?? Issues 1-SWR meter bulb burned out 2-LED display is missing a couple segments 3-Doesn't receive very well unless right next to some one 4-It won't transmit and when keyed up it short out and shuts down Thanks Jay.

Scroll to continue with content. BReeves Joined Nov 24, Oh would anyone know what this kind of ribbon cable is called and where it can be found???

It would help to know the pitch. It's hard to search for though, they had sockets specific for ribbon cables as well. Not sure of the pitch. What's wrong with using what you have, it's just wire and doesn't look to be broken.

I would probably just replace it with jumpers if I were going to replace it at all. Sorry for delay. I managed to fix the burnt out led display with a brand new in solid green vs the stock lime green. Also the light for swr meter has been fix with a green led.

There was some cold solder joints that I touch up and thinking about resolder the whole board. No further testing has been done but I might get it back together tonight for some testing in the truck. You must log in or register to reply here. Similar threads Long term availability of classic 3 terminal regulators 6V Classic Car: relays for subsystem control Trying to revive a Bose L1 classic model tower speaker.

Converting classic motorcycle from 6v to 12v Classic car 6v to 12v. You May Also Like. Continue to site.Drivers and their loved ones can always count on Cobra for reliable communication and safe power solutions. Broader Protection with Shared Alerts.

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cbtricks cobra 25

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cbtricks cobra 25

Elite Series Advanced Driver Awareness. Dash Cams Video. Jump Starters Never Be Powerless.Very happy with this cobra 25 ltd classic. I own a 29 ltd also both are very good cb's would highly recommend ether one. I had great reception from day one. Works great with the mike that came with it. Best deal I could find! Here at Walmart. Your email address will never be sold or distributed to a third party for any reason. Due to the high volume of feedback, we are unable to respond to individual comments.

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cbtricks cobra 25

Update Location. Learn more. Report incorrect product information. Cobra Electronics. Walmart Out of stock. Add-on services. Add Walmart Protection Plan. Delivery not available. Pickup not available. Add to List. Add to Registry.The manufacturers failed to tell their customers about the new technology incorporated into their latest Radios. The problem was a "failure to communicate" between manufacturer and the ad agency.

The benefits of the soundtracker circuitry can only be effective when communications are taking place between 2 two or more units that are equipped with the soundtracker circuit. Of course the manufacturer did not explain this to there customers.

Radio Modifications

Of course they would not mention this because the buyer would not buy the radio if he knew of this feature. Cobra has really shot themselves in the foot with this new radio, why you ask? Their Sideband radios such as thegtl and were superb, they were stable and a radio you could be proud of. The first thing that happened to Cobra was that Uniden wanted to raise the price on there PC boards, Cobra did not like this so they got some other company to make there boards cheeper!

Of course this is all history, they fixed that problem. I had a customer send me a NW ST for peaking and tuning for better receive and transmit. So before doing anything else, I hooked it up to my antenna to get some radio checks, well, AM was OK, nothing to write hone about but clear and clean.

Then I went to Sideband, now people say they can't "clarify" me in, What! So I tried some others on the band with the same results, can't clarify me! So I'm thinking maybe my oscillators are off frequency so I check them and find that they are a little off so I align them.

This time is the same as the last, they can't clarify me! So I really got concerned! After checking the oscilator frequencies I find that they change when I modulate! What the Hell! I placed a volt meter on several test points and found that the voltage to the oscillators is changing with modulation! So I start looking for the reason for this and ran into the cause right away.

The new units don't have the MB Voltage Regulator, They have decided to further cheapen the radio by doing away with it! What this all boils down to is this, the radio is in my opinion now is somwhat "unstable" on sideband and I for one, would not own one!

To my knowledge it could be inproved with some additional filtering and RF bypassing. Cobra HH34 Basic handheld with charging jack and lighter plug. Cobra Discontinued The Cobra is Cobra's newest and best base station ever! Change R76 3. Change R43 10 Ohm to a 2. Change R 1 Ohm to a. Replace stock final with a 2SC transistor.

Re-tune coils L10,L9,L8 for maximum forward Power. Modification: Change stock final to a 2SC Change C71 to a 33uf 16volt polarized electrolytic capacitor. Two, Install a k ohm pot between these two points. The smaller the value, the more the receive is boosted. I've tried it, Peg Leg Cobra No Audio on AM Transmit with good Carrier, This problem is more common in the "older" 's but is relatively easy to fix.

Look for the collector of TR, you should read about 4. If you find that this voltage is not present, check on the opposite side of R for 6. Most likely this voltage will not be present; if this is the case, C18 has shorted and needs to be replaced.

This is a uf, 10V electrolytic capacitor beside L To prevent "future" problems, replace with a 16V unit. Transmit Audio normal.Log in or Sign up. Find Trucking Jobs. May 23, 1. This will be somewhat of a long post, but worth reading The info contained herein will save you some money. Ohhhh Yesss it Will They call me Texas Trash on the road I know some of you may know me If you want your Cobra 29 LTD to be a loud booming talker you don't have to pay some cb hacker to "fix ya up".

Swing Mods are snake oil Don't pay to have this done Any kind of mod D11 etc, etc. If you really want your radios audio loud and proud you can do it yourself. It is real easy. Just open that badboy up on the speaker side and find VR VR4 is the AMC pot It controls your audio output Once you find VR Take a plastic screwdriver get a cheap set at Radio Shack That's it Put the cover back on and go ask a buddy on another cb how loud your audio is.

Make sure your dynamike is all the way up too. It's that simple guys and gals Now for the microphone Do not pay big bucks for an RK56 noise cancelling mic. You know the Turner Telex Road King You are paying for name only Guess what? The Workman SS56 noise cancelling mic is the exact same mic Ohhh Yesss it Issss!!! The insides of the Workman have the exact same mic element Ohhh Yesss They AreCobra has really shot themselves in the foot with this new radio, why you ask?

Their Sideband radios such as thegtl and were superb, they were stable and a radio you could be proud of. The first thing that happened to Cobra was that Uniden wanted to raise the price on there PC boards, Cobra did not like this so they got some other company to make there boards cheeper!

Radio Modifications

Of course this is all history, they fixed that problem. I had a customer send me a NW ST for peaking and tuning for better receive and transmit. So before doing anything else, I hooked it up to my antenna to get some radio checks, well, AM was OK, nothing to write hone about but clear and clean.

So I really got concerned! After checking the oscilator frequencies I find that they change when I modulate! What the Hell! I placed a volt meter on several test points and found that the voltage to the oscillators is changing with modulation!

Big, Loud, Cobra 29 LTD Radios

So I start looking for the reason for this and ran into the cause right away. To my knowledge it could be inproved with some additional filtering and RF bypassing. Cobra HH34 Basic handheld with charging jack and lighter plug.

This is a typical example of mis-information, the resistor changes listed below will not produce more power, they will make the radio sound crappie. Change R76 3. Change R43 10 Ohm to a 2. Change R 1 Ohm to a.

Replace stock final with a 2SC transistor. Re-tune coils L10,L9,L8 for maximum forward Power. Modification: Change stock final to a 2SC Change C71 to a 33uf 16volt polarized electrolytic capacitor.

Two, Install a k ohm pot between these two points. The smaller the value, the more the receive is boosted. Look for the collector of TR, you should read about 4. If you find that this voltage is not present, check on the opposite side of R for 6.

Most likely this voltage will not be present; if this is the case, C18 has shorted and needs to be replaced. This is a uf, 10V electrolytic capacitor beside L Transmit Audio normal. The newer units may have corrected this problem.

Output level uV. Set Squelch Maximum. Adjust VR-3 so that squelch just breaks. Adjust VR-1 for s9 on signal meter. Adjust VR-2 for s9 on signal meter. Receive on adjacent channel: Bad solder joint to C next to Missaligned VR4. DO NOT adjust!!! Stretching L12 gets more output.We invite you to JOIN today so that you can post and interact with our members.

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COBRA RADIOS & MODIFICATIONS

If you have not received your activation email please check your spambox or contact us at the contact us menu link above!! If you are told you are spam when registering contact us at the contact us menu link above!! I need one for testing out some new ideas and old tricks.

Let me know what you got and what you want for it. Might even work out something in trade if you're intersted. Working my 1 watt walkie talkie and coax dipole in my basement I will have to keep that link in mind when it comes time for me to mod up some for a few buddies Working my 1 watt walkie talkie and coax dipole in my basement I've got a lot of parts to replace inside one when I finally find one to monkey around with.

Once I get that outta the way I'll see what's going down with the wholesaler and what kinda deals I can get to start my ideas.

BTW, I'm thinking you need to PM me an address, I got something I'd like you to test out in the real world Working my 1 watt walkie talkie and coax dipole in my basement Remember Me? Page 1 of 2 1 2 Last Jump to page: Results 1 to 10 of Thread: Cobra 25 or Thread Tools Show Printable Version. Cobra 25 or 29 doesn't need to be anything special, just cheap. Not bad BM, thanks for the links, but I'm thinking I might go hang around the truck stops in Ashland the next couple of nights.

I will have to keep that link in mind when it comes time for me to mod up some for a few buddies.

Cobra 25 LTD Sound Tracker with Variable Power Mod

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