Tip & How-To about Radio Communications

Making a Dual Final output on cheap CB radio.

Get you a cheap radio Uniden/Cobra etc. Buy you a 2SC2078 or 2SC 2075 from RADIOSHACK for around $4 or take a good one from another radio. Solder to your already 2SC2078 final (fit it to match up) make sure you use a strong epoxy glue,(Liquid nails or silicon glue) Glue it to other 2SC2078(Let dry 24 hours - 48 hrs.) Wait couple days to turn on power. This is the dual configuration which produces more (Amperage) to (Wattage) If it gets HOT!!!....ADD Heatsink to Second 2SC2078(Just a piece of metal glued to front of it. DO NOT TRY THIS ON YOUR BEST RADIO YOU ARE PRESENTLY USING. THIS IS AN IDEA TAKING FROM OLD AGE (Am radio transmitters-in the day).

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I need to know ! How do I make my Maxon MCB 45W Louder ....What do i have to do in my radio to make my transmit louder....Thank you!


I know you don't want to hear this, but the Maxon radio you own, and many similar radios (Cobra 19, Midland CB-1, Midland NT-CB-1001LWX, Uniden PRO-505XL, etc) are on the bottom of the performance list. These are for those who just need a crappy radio for the summer time traveling, and about keeping the cost as low as possible. Here are a few of my favorites that have good-LOUD audio: Galaxy, Connex, General Lee, and some of the older Uniden radios like Grant XL, PC-76XL or older Cobra 29 LTD, 25 LTD models.
Please stay away from Stryker radios, Magnum radios, Northstar radios and any radio which has a NITRO-KNOB. These are ticking time bombs. In other words, they WILL fail and it wont be an easy fix either. Most Strykers and Magnums have PCB Chip failures. They are next to impossible to replace. And finally, don't be so quick to buy the pretty radio with all the flashing lights either.

Mar 21, 2013 | Radio Communications

1 Answer

Where can I find a replacement speaker for my Uniden Solaria?


Hi Douglas,

Firstly, do you have the user service manual for this unit, if not you should be able to download this from the Uniden website, free.

You may have a failed speaker, which will require replacement, if that is the case, Your local Radioshack or similar store will have such a part, and they're inexpensive.

You sound as if you have enough knowledge to fix this yourself, just buy the parts and you're on your way.

Best regards,
Peter

Oct 05, 2012 | Uniden Solara - VHF Marine 2-Way Radio

2 Answers

Cobra 1000 GTL by Dynascan


This is a complicated modification. I have never done it to a 1000 GTL, but its done basically the same in all radio's.

I don't recommend doing it, especially since I am not 100% sure on how exactly to do it. I have never been in a 1000 gtl. If I had one in front of me I could tell you for sure how to do it.

If the reason for Variable power is a linear, just a swing kit in for the dead key you need, most likely 2 watts, and leave it.

Here is how to do a variable power mod. this is assuming the swing mod is done the same to this as a cobra 25/29 or uniden 68/76 etc.

If you would like to try it, here it is.

You get a TIP31 transistor, Radioshack has them.

Where you put the swing mod in the radio, which is a cap and a resistor, you put the TIP31 and cap. A 47uf cap works fine.

With the resistor facing you, and the tab in the back away, solder the cap to the transistor. the leg with the black stripe goes on the right most leg. then the other goes to the center leg of the transistor.

Solder a wire on the left most leg, long enough to reach the front of the radio. Now solder the 2 legs that don't have the wire on it, in the place where you would put the swing kit, with the black stripe on the cap facing the back of the radio usually.

Remove the wires from the RF gain and solder them together.

Now solder the wire from the transistor to the center tab.

Remove VR6 and solder a wire from the top tag of the RF gain to the top connection of VR6 that you removed.

Then connect a wire from the bottom tag to a ground point. The side of a tuning can works fine.

Take a piece of shrink tube and put it over the TIP31 so it does not ground against the heat sink, that would be bad.

This is done basically the same in all cb radio's.


Apr 07, 2009 | Cobra 148 GTL 120-Channels Base CB Radio

1 Answer

No reception


Open it up,
check your speaker connections.
Check your antenna connections, Radio & Antenna
Check inside your mic connector for a broken solder joint on one of the pins. Otherwise, it could be a bad audio chip.
Maybe even a break at the antenna connector inside the radio.
If none of these, Radioshack has a reasonable repair service on many radios, cobra is made by uniden, who makes radioshack radios as well.

Aug 10, 2008 | Cobra 29 LTD CB Radio

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