Question about Radio Communications

1 Answer

Realistic TRC-458 Base CB Problem ??HELP??

Found a mint TRC-458 in box - Cleaned out the control & pots. Powers up nice on AC / DC power : Bright display, all functions works , no scratching no dust inside. Clean. Received 100% Transmits AM : NO power seen on S-Meter nor a Watt Meter connected to a 50 Ohm load? USB , same thing , except on LSB it works with about 8 watts PEP seen .. OK, where did I go wrong here ?? Any ideas when I should look, I have some test equipment here to help.. Thanks

Posted by on

Ad

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Radio Commun... Master
  • 15,633 Answers

This uses a uniden board and has a relay for transmitting, check and clean the relay contacts

Posted on Jun 10, 2013

Ad

4 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

Ad
  • 10 Answers

SOURCE: Ok, i have one CB that is a realistic TRC-474

there a several things you can check yourself with a minimum of tools or test equipment. this model has been around for several years and voice coils do expire in the internal speakers as they age. attempt to locate a known good external speaker with a 3.5 mm plug and see if the receiver can be heard through it. if so then the internal speaker has seen better days and the solution/s should be obvious. also in this particular model the receiver output is controlled by the microphone switching and an open receive line in the mic cord/cable or the plug itself would render the receiver unhearable. check with another known good microphone wired for realistic radios (5 pin DIN). the microphone might also have been rewired improperly. make sure the squelch is in the fully counter-clockwise position and the volume is adjusted to a suitable level while testing, 12 o'clock or higher.

Posted on Jun 10, 2009

  • 141 Answers

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

4 amps MAX

Posted on Jan 30, 2010

SD Tech
  • 14553 Answers

SOURCE: Have a Magnum 257HP 10 meter radio. While connected to a 50 ohm dummy load, and a power meter, noticed that the USB and LSB would not modulate when a voice input is placed into the microphone. Also

You may have a radio where the AM limiter has been defeated which can cause all kinds of issues. I would first check the mic is wired right and does not have a problem, the radio should have output with a tone to it on sideband--wattage up to over 20 watts on SSB is normal.

Posted on Dec 12, 2012

Add Your Answer

Uploading: 0%

my-video-file.mp4

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

×

Loading...
Loading...

Related Questions:

1 Answer

Looking for a owner manual for a RoByn cb model #sb-520d


I cannot find a link to an owners manual for that radio but there are many different radios that share the same board on the inside. Cobra 139XLR , Cobra 138XLR , Realistic TRC-458 . those are the most common but there are about fifteen radios with the Uniden 858 chassis.

Feb 13, 2016 | Radio Communications

1 Answer

How do I wire a tuner plus 3 mic to a vintage realistic trc 458 cb radio ?


Hi Carl, I found 2 different hook-ups so I will list them both. You can check them out according to the wire colors you have in the mic cord. First one and this may be for a turner mobile mic. ;
Turner
1- Shield & Red
2- N/C
3- Blue
4- White
5- Black
Yellow NC

This one is out of the Turner book but they did not list your radio exactly. This is the most popular hook-up for Realistic's.
Code E;
1-S
2- N/C
3- Bk
4- Wh
5- Red
Hope this helps, Mike

http://www.cbtricks.com/mic_manuals/turner/turner_mic_wiring_book.pdf

Oct 29, 2015 | Radio Communications

1 Answer

TRC - 458 fix??


First,do you have a factory service manual.Second ,did you follow it. You have all the equipment necessary to check any radio .Some radios have to be checked by the number and others you can go to a procedure number and just perform that one. As for this radio I don't have a manual for it but I would start all over again by the number and recheck all your work You may not have enough electric power or to much on some of those components.

Apr 15, 2013 | Radio Communications

1 Answer

I had a Realistic Navaho TRC-458 Given to me it will transmit but not receive what could be causing this


Alot of problems could knock out the recieve in these radios, from audio amplifer failure to a bad tr-5, i would check or replace TR-5, these are famous for going bad! replace TR-5 with another good transistor of the same type and number! :-)

Jul 02, 2012 | Radio Communications

1 Answer

I have a realistic trc 458 am&ssb base station that receive dies in after its on for awhile and you key up receive goes quiet but if you switch to ssb and back to am receive comes back till you key up...


Sounds like a dirty mode switch, contact cleaner should fix that problem! also the relay could do with some contact cleaner as well! its a mechanical problem! :-)

May 19, 2012 | Radio Communications

2 Answers

We need a wiring Diaghram for a Realistic TRC 495 Echo Mic.


You can download it at CBtricks.com ....hope this helps....

Dec 08, 2007 | Radio Communications

9 Answers

Mic wiring diagram


Want to wire cobra mic to a uniden washington radio

Nov 20, 2007 | Radio Shack TRC-447 CB Radio

Not finding what you are looking for?
Radio Communications Logo

Related Topics:

113 people viewed this question

Ask a Question

Usually answered in minutes!

Top Radio Communications Experts

eradiostore
eradiostore

Level 3 Expert

1654 Answers

Brad Brown

Level 3 Expert

15628 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...