Question about Radio Communications

1 Answer

Trc 424 with tx mod coming out of the internal speaker.

Hi, I am working on a friends trc 424 that has a "talk back" problem. The radio transmits well with good modulation it just has this tx audio coming out of the internal speaker loud and clear problem. Where should I start to troubleshoot this problem?

Posted by on

  • n2vww Nov 22, 2013

    I found the problem, It was an open diode.

×

1 Answer

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    MVP:

    An expert that got 5 achievements.

    Governor:

    An expert whose answer got voted for 20 times.

    Hot-Shot:

    An expert who has answered 20 questions.

  • Expert
  • 141 Answers

Check for a resistor soldered across the P.A. jack and external speaker jack (solder side of the board) if you see one, remove it

Posted on Nov 26, 2013

6 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

  • 13433 Answers

SOURCE: Radio Shack TRC-502 cb radio

Here is the owners manual I'l see if I can get my hands on a internal schematic

http://support.radioshack.com/support_electronics/doc62/62220.pdf

Posted on May 14, 2008

  • 55 Answers

SOURCE: radio shack trc-502 cb radio

YOU CAN GET SCHEMATICS FOR THAT MODEL
I JUST LOOKED IT UP FOR YOU........THE BOOK IS SAMS PHOTO FACT...WEBSITE IS

WWW.SAMSWEBSITE.COM

THEY HAVE EVERY CB RADIO EVERY MADE

GOOD LUCK

Posted on Feb 21, 2009

  • 773 Answers

SOURCE: Cobra 29LTD CHROME low tx no mod, rx good low Vol, talkback good

1 why would you change the finals?? Have you checked you antenna? How are your SWR's? Crappy antenna's cause a lot of problems.

Use an external meter to see what the SWR is, and see what the output is PEP. If its low, then there is something wrong. If it is High, change the mic and turn up the dynamic all the way.

Next. Have you been messing around in there?? Tryin to get more wattage? You turned VR4? If you thought you were turning it up by turning it all the way to the right, you turned it all the way down. Turn it all the way to the left.

Posted on Jun 17, 2009

Benimur
  • 6966 Answers

SOURCE: cobra 142 gtl no audio on receive

Hi and welcome to FixYa,

Initially, the speaker of course has been checked?

Offhand, would partial schematic of the mic and speaker section help?

7008f3b.jpg

Good luck and thank you for asking FixYa.

Posted on Dec 20, 2009

  • 141 Answers

SOURCE: how many amps does a Reakistic CB radio TRC-474

4 amps MAX

Posted on Jan 30, 2010

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

I need wire colors for CB microphone its a TRC


ALTAI PWR MIC - black/braid= earth, red=RX, white=TX, Yellow=MODASTATIC - blue/braid=earth, black=RX, red=TX, white=MOD, Yellow=Spare
SIRTEL ECHO MIC CBE 2002 - black/braid=earth, blue=TX, white=RX, red=MOD007 POWER MIC - brown/braid=earth, green=RX, white=TX, blue=MODSADELTA EC 980 - braid=earth, green=RX, brn=TX, white=MOD
or braid=earth, black=RX, blue=TX, white=MOD

Oct 30, 2016 | Radio Communications

4 Answers

Radio Shack TRC-502 cb radio


Here is the owners manual I'l see if I can get my hands on a internal schematic

http://support.radioshack.com/support_electronics/doc62/62220.pdf

May 14, 2008 | Radio Shack TRC-503 CB Radio

1 Answer

As this radio shack trc 503 cb radio will only transmit but it has loss it audio sound and no noise as nobody seems to don't why this has loss it audio and soun


If its RX audio you have lost then your audio chip is faulty or the speaker, try an external speaker or new internal speaker

Oct 24, 2013 | Radio Shack TRC-503 CB Radio

1 Answer

Feedback through speaker during transmit


ARE YOU TALKING ABOUT THE INTERNAL SPEAKER IF SO THE WIRES TO THE SPEAKER INSIDE ARE BEING SHORTED TO GROUND TOUCHING SOMETHING METAL

Feb 24, 2013 | Radio Shack TRC-503 CB Radio

1 Answer

TRC-481 No sound


test the internal speaker to see that sound is indeed getting to it.Hook an external speaker to it and see if that works.you just may have to change the speaker but it could be more than that. Do thisfor now then repost as to what you did and whether it worked or not because there is more problems and they are internal. Just go with this for now and if it doesn't work you may have to get it to a tech to repair it.

Jan 10, 2013 | Radio Shack Trc-481 Cb Radio

2 Answers

Trc 481 manual


Insure that you can receive transmitting stations.
• Be sure you are pressing the talk button

all the way in

• Make sure CB/PA is set to CB.

• have a check on cable and PL259 connectors

• Insure that the antenna resonates on the same operating

frequency of your radio, that is 11 meters


To determine if you have a bad finals, only your neighbor

@ about 20 ft can hear you.



For your manual:

Realistic TRC-481 (210-1550)

Jul 26, 2012 | Radio Shack Trc-481 Cb Radio

1 Answer

Have trc 457 need to clip mod limiter, what to look for?


why do you want to clip the limiter ? you will be overmodulaing the audio and bleeding over all the channels and this is great but also a good way to loose friends because while you are talking they cannot listen because your voice will be coming through their radio. the best thing to do is leave it alone and find the variable to turn the mod up then you should be at around 90% modulation .

Nov 10, 2011 | Radio Shack Radio Communications

2 Answers

I have a TRC 502A CB radio that hasn't been used in about 5 yrs. I recently tried to use it and when I transmitted, the audio came thru the speaker. Any idea what's wrong?


it could be grounded inside...Somebody may had it set for Talkback features.. Take it apart look for speaker wires (see if soldered to resistors) if its shorted seperate wires ..just have speakers wires attached. Try external SPKR. Try different mics or radio may have gone bad completely.

Apr 07, 2011 | Radio Shack TRC-503 CB Radio

2 Answers

Need to replace microphone on a Radio Shack TRC 447 CB. 6 pin Anybody know?


A great mic is the RK56 $39.99+tax in Temple, TX on Hwy 95.. And comes with a 4pin for cobras but can be wired for any radio

Aug 09, 2010 | Radio Shack TRC-447 CB Radio

Not finding what you are looking for?
Radio Communications Logo

Related Topics:

80 people viewed this question

Ask a Question

Usually answered in minutes!

Top Radio Communications Experts

eradiostore
eradiostore

Level 3 Expert

1646 Answers

Brad Brown

Level 3 Expert

15441 Answers

Mike Charette

Level 3 Expert

1795 Answers

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

Answer questions

Manuals & User Guides

Loading...