Here is a module and control to add a feature to your AM-only CB transceiver. A carrier control for the Cobra 29 series of 40-channel CB radios. It's self-contained and comes with a new control. Remove the factory "SWR Cal" control and bolt this one down in its place. It will fit the original factory knob. 

If you're not already familiar with removal of the jumper wire JP36 and replacing it with a parallel resistor and capacitor, maybe this item is not for you. That particular modification has been around for decades. It serves to reduce the radio's carrier power without reducing the "swing", or the modulated peak power.   Most techs are well familiar with it. If you are not familiar with it, this is probably not a good "FIRST TIME" project. This module is a step up from the resistor/capacitor mod. If you already know what makes it work you won't have any trouble getting it installed. 

It's a labor-saving device that simplifies installing a carrier control in this type CB radio. Sure, you can buy the parts and wire up your own for a lower materials cost. The schematic is there for everyone to see and copy. But we developed this module to save our customer's money by reducing the labor to get this feature installed. If your labor is free, the price of this module won't look attractive in comparison. But if someone is paying to get this done, the savings in labor cost has always justified using it here. Your mileage may vary. 

There is one picture of a final transistor that has been loosened, revealing a lack of heat-sink compound where it should be smeared onto both sides of the insulating washer. Make sure the final in your radio is not "dry", and has a proper thin layer of this stuff on both surfaces of the insulating washer. Some of the vendors who have built this radio were stingy with the stuff. Makes the final transistor vulnearable to overheating and failure. 

There is NO INSTRUCTION SHEET included. The pictures shown here should answer any questions about what to do and how to do it. 

PLEASE NOTE! THE RADIO AND COTTON SWAB SEEN ARE *NOT* INCLUDED, AND SHOWN ONLY AS AN EXAMPLE. 

The new control solves two potential problems. First, we see too many radios that have burned out the factory SWR Cal control by wiring it up the "simple" way to control the carrier. A new control sidesteps this risk. Yes, you could just unhook the factory control, unhook the wires from the new control and hook up the three white wires to the old one. 

Sure would be a waste of labor. Your choice. 

There is a trimmer pot on the module to set the minimum carrier level when turned all the way down. The radio will still show AT LEAST 90 percent of the modulated power with the carrier turned down that it showed with full carrier power. 

YOU SHOULD PEAK THE COIL L14 FOR MAX MODULATED POWER before taking anything loose. As a rule, removing this tuning slug will deliver the max modulated power. Feel free to reduce the transmitter's max power by turning the slug clockwise if you wish to turn it down. 

The module tends to block your access to the tuning slug in L14 when it's installed, so peaking it beforehand is just easier. 

There are only three wires to attach. Two bare wires line up with the empty holes left where JP36 was removed. The black ground wire is show as GREEN in some of the pics. The module we ship will have a black ground wire. It gets inserted into a hole in the circuit board near the rear corner. You may have to scrape the green mask paint next to this how so the end of the ground wire will solder properly to the circuit board's ground foil. 

The "Peel 'N Stick" part of the description works best if you soak a cotton swab in alcohol and clean the surface of the heat sink where the module will be attached. Peel the "VHB" backint, poke the bare wires into the two holes for JP36 and stick it to the heat sink surface. A gentle squeeze with needlenose pliers as shown will prevent it from coming loose later. 

Remove the factory SWR Cal control, wrap it in tape and zip-tie it to the wiring harness. Insert the new control it its place and tighten the bushing nut. 

Push the factory knob onto the new control shaft and you're done!

We won't talk about why you would want to reduce the radio's carrier power. No need.

There are NO RETURNS AT ALL FOR ANY REASON OF ANY KIND!

No matter how good they sound.

We ship no later than the second business day following receipt of cleared payment. I prefer USPS Priority Mail. It's been VERY reliable and comes with tracking. I will insure it for the final sale price. 

IF YOU PREFER A DIFFERENT **USA ONLY** SHIPPING METHOD, CONTACT ME **BEFORE** YOU PAY! I will prepare a quote for the method you specify and send you an invoice for the corrected amount. This option is available to USA destinations ONLY!

!!!! NOTE !!!!

Shipping to destinations outside the US are by the Ebay GSP or Global Shipping Program. 

How much that will cost you is anybody's guess. Ask Ebay if you want to know. Maybe they'll tell you. They won't tell me.  Maybe they should rename the "GSP" the "Global Secret Program". 

GSP ONLY!! GSP ONLY!! GSP ONLY!!

No, I will NOT ship direct if you are outside the USA and its colonies. 

GSP ONLY!! GSP ONLY!! GSP ONLY!!

If you know what it is and what it's for, you can decide if you want or need it.

And if you don't know what it is, you probably don't need it. 

Trust me on this.

All routine Ebay precautions apply. Scammers take your nonsense elsewhere.

Please.

Thanks for looking and happy bidding!