Question about Radio Communications

1 Answer

No transmit Have a pile of CB radios I acquired and am just going through them and seeing what I can do. This one has no transmit and seems to be missing the finals component Q17 but I cannot find a schematic to tell me what the part number is for it to get a replacement any help would be appreciated.

Posted by on

  • Jonathan raymeer May 01, 2013

    realized I forgot the model it is a TRC-464 p/n 21-1554A

  • Jonathan raymeer May 10, 2013

    thank you for your info, I put in a final and now the radio is blowing fuses but with no final in (and yes it is a good one) it stays on. So now i get to figure out where the bad part is causing it to blow fuses. So if there are any schematics available it would make it easier to trace out, but for now I will go the old fashion manual tracing route.


1 Answer

  • Level 2:

    An expert who has achieved level 2 by getting 100 points


    An expert that got 10 achievements.


    An expert that got 5 achievements.


    An expert who has written 50 answers of more than 400 characters.

  • Expert
  • 500 Answers

Do you have a model # and brand.? 2sc2312, 2sc2166, 2sc1969. 2sc2028 etc.. are common RF transistors. most are discontinued. but can still be found.. MOSfets replacements are available for nearly any radio.. ERF2030's and IRF520's and there are others. but must be a RF style.

Posted on May 07, 2013

6 Suggested Answers

  • 2 Answers

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

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.

Posted on Jan 02, 2017

  • 55 Answers

SOURCE: CB Radio will receive but not transmit

Sound Like The Modulation Amp May Be Dead..
Or a Componet in The Mod. Section....You Can Pick up The Repair Manual..@ For about $20.00...Good Luck

Posted on Feb 21, 2009

  • 211 Answers

SOURCE: Galaxy dx99v cb radio

I see no one has responded to your question. The reason may be that the information is a bit vague. The are a lot of reasons a radio won't receive. In the Galaxy 99, the mic doesn't have to be connected to receive a signal so that illimates the mic possibilities. I have found that in some of the Galaxys I have worked on, that the if section ( thats the section near the pll chip, has cold solder joints ( broken solder connections to the pc board ). You may want to look real close at the pc side of the board with a magnifing glass and see if you can find any electronic components ( resistors, transistors. etc ) loose. Good Luck
NC Electronic
Mills, Wyoming

Posted on Jan 08, 2008

  • 6966 Answers

SOURCE: my galaxy 959 cb radio wil not put out any transmit


Based on your post of no transmit, a couple of possibilities:
1. defective microphone or cord or PTT switch (the red TX light does not come on when pressed);
2. TX light comes on but no output, defective finals and/or drivers. These are the transistors screwed to the chassis of the radio very near the antenna terminal;
3. defective regulator IC that provides the TX B+;
5. insufficient amperage from you power supply;
6. too high SWR.

Hope this be of initial help/idea. Pls post back how things turned up or should you need additional information.

Good luck and kind regards.

Thank you for using FixYa.

Posted on Feb 16, 2008

  • 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

Posted on May 14, 2008

  • 1 Answer

SOURCE: Midland alan 48 plus transmit scale not moving

Sorted now, soldered a new output transistor into the board and all working.

Posted on Dec 12, 2008

Add Your Answer

Uploading: 0%


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



Related Questions:

1 Answer

Good day I have an cobra 148 Gtl tx and rx a working but no out put

It might not seem obvious but on many, if not all, current CB radios have separate wires coming from the microphone for RX and TX. It seems like the mic wire for TRANSMIT may be open. It is a common failure.

Feb 28, 2015 | Cobra 148GTL

1 Answer

Midland 1001lwx does not transmit any solution

take the little switch on the front and flick it to CB , turn up the mic gain and have at it.

Feb 16, 2013 | Midland 1001LWX CB Radio

1 Answer

Galaxy dx 2547 base cb frequency drift problems

for upper ssb adjust L21 for 16.51250 mhz . adjust L22 for 16.50750 for lower ssb. you do have a frequency counter don't you ?

Jan 01, 2012 | Galaxy Radios DX-2547 40-Channels Base CB...

1 Answer

Cb transmit noise

Its just RF feed back, that's normal, try to re-route the coax, or just turn the FM down, o try turning your modulation down....hope this was helpful....

May 29, 2010 | Cobra 75 WX ST 40-Channels Handheld CB...

1 Answer

CB radio recieves but does not transmit.

I would recommend that you put an swr meter (CLICK HERE) between the radio and the antenna to see if your radio is transmitting anything at all. Also, it will check to see if your radio is correctly matched to your antenna. If your antenna is not matched correctly it will fail to transmit correctly.

Nov 09, 2009 | Radio Communications

2 Answers

Not able to transmit or recieve on cb radio in car

It could be your ant. a broken coax wire or a bad ground could cause this a could a broken or shorted wire on your mic.

Jun 02, 2009 | Maxon Radio Communications

1 Answer

Cobra 29 wx st


Feb 14, 2009 | Cobra 29 WX NW ST 40-Channels Base CB...

1 Answer

10 kc drop at key up no transmit

have you changed the voltage regulaor, or check it first 2 outside legs should red your 13 volt middle around 9

Jan 03, 2009 | Galaxy Radios DX-959 40-Channels Base CB...

2 Answers

Cb radio

Some CB Radios require the mic works right or the receive won't work. Also it could be a detector diode bad. I have also found cold solder joints ( broken lead from the PC Board ) around the if sections. You might take alook with a magnifing glass and see if you can see any bad joints. Good Luck
NC Electronic
Mills, Wyoming

Dec 02, 2007 | Galaxy Radios DX-33HML 40-Channels Base CB...

1 Answer

Lost channels in a galaxy 66v cb radio

as far as the transmit frequency changing while you have the mic keyed this is normal, the transmit frequency is a little different than the receive, as far as the lost channels go you need to check the galaxy website and check to see if thier is any fixes listed. if none is listed then you can send the tech's a e-mail and tell them your problem and they will advise you on what to do.

Aug 15, 2007 | Galaxy Radios DX-66V Base CB Radio

Not finding what you are looking for?
Radio Communications Logo

Related Topics:

72 people viewed this question

Ask a Question

Usually answered in minutes!

Top Radio Communications Experts


Level 3 Expert

1646 Answers

Brad Brown

Level 3 Expert

15451 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