20 Most Recent Radio Shack TRC-447 CB Radio Questions & Answers

My understanding of the TRC-502 is that it is 49 MHZ not CB. With that said I cant find
a microphone diagram for that specific radio. I found a 503 but that is a CB. I couldnt find a
wiring diagram for either radio. You could always call Radio Shack or The Shack, contact them online or call and ask for the info.
Call: 1-800-843-7422

Radio Shack... | Answered on Mar 04, 2017

Adjustments for the TRC-447 Cb - The AMC sensor is Q205 and I never really recommend cutting anything related to the AMC but this radio is the aception to the rule. I posted a picture for you. The red marking is Q205. Follow these instructions carefully and you should have a much louder CB. Q205 has three legs. One on one side and two on the other side. You need to cut the soldier leg on the side with two legs. This will be the leg closets to the bottom of the diagram I posted. Use a razor and and perhaps a magnifying glass and be very steady. You want to make a complete cut until you see nothing but the circuit board. You may have to make more than one pass. It is very important you only cut the bottom leg. When your done with that turn the radio over and spred L205 and L203 with a plastic screwdriver. Spread them evenly and make sure they don't touch anything when you are done.

Radio Shack... | Answered on Jun 22, 2016

Are you talking about the adapter? Any 13.8 volt adapter that the allows the plug to fit properly should work . Just make sure it fits snug and make contact .

Radio Shack... | Answered on Mar 20, 2016

this is one of those radios where the only one that works is the original.

Radio Shack... | Answered on Jan 30, 2016

not worth the time or effort to do on this radio. years ago when it was the thing to do , yes but not today when you can get a radio with those channels already installed .

Radio Shack... | Answered on Oct 30, 2015

why do you want to delete a question? maybe the answer you get will help someone else .

Radio Shack... | Answered on Jul 17, 2015

L104,L106 Power and Q107 AMC defeat

Radio Shack... | Answered on Jul 17, 2015

www.cbtricks.com has a service manual .

Radio Shack... | Answered on Jul 17, 2015

VR-7 mod and L6 , L7 , L14 FOR POWER

Radio Shack... | Answered on Jul 17, 2015

According to the service manual for the TRC-447, the only adjustment is for "power" which is #L205. The only other step in the transmitter alignment is for the "S" meter.
On the Cobra, VR4 is AMC, L14,L13,L12 is AM power.

Radio Shack... | Answered on Jun 03, 2015

trial and error

Radio Shack... | Answered on Jun 01, 2015

www.cbtricks.com has you complete manual with schematics.

Radio Shack... | Answered on Jun 01, 2015

WX will work because its on a higher band and its receive only. Now if you are listening to AM and there is a ton of ground noise or maybe none at all its due to ground plane. Either you are not getting a strong signal which will give you no noise or a real strong signal which will not let you talk much more than maybe a mile which again is ground plane , giving too much won't let you transmit and too little there is no one to transmit with .

Radio Shack... | Answered on Feb 23, 2015

same as the 478

Radio Shack... | Answered on Jan 05, 2015

It doesn't make a difference how big your final is the radio will not except it. What I'm saying is if you install a 100 watt final into it ,no matter what you will only get a max of 25 watts because the radio cannot handle the 100 watt load.No if you start changing components inside the radio to obtain the 100 watts you are now in violation of fcc rules , unless you are a licensed tech , if you were then why are you asking this question. The best thing to do do is get a 100 watt amp and hook it up. you will be smoking the neighborhood.

Radio Shack... | Answered on Dec 30, 2014

google it

Radio Shack... | Answered on Dec 18, 2014

Want to wire cobra mic to a uniden washington radio

Radio Shack... | Answered on Dec 11, 2014


Radio Shack... | Answered on Dec 01, 2014

Not finding what you are looking for?
Radio Shack TRC-447 CB Radio Logo

104 questions posted

Ask a Question

Usually answered in minutes!

Top Radio Shack Radio Communications Experts

Michael Thomas
Michael Thomas

Level 3 Expert

3053 Answers


Level 3 Expert

85239 Answers

Brad Brown

Level 3 Expert

18402 Answers

Are you a Radio Shack Radio Communication Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

View Most Popular

Radio Shack Radio Communications

  • Radio Shack Radio Communications

Most Popular Question

big finals install radio shack

  • Radio Communications