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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.

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  • 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.

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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

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Posted on Jan 02, 2017

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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..@ www.samswebsite.com For about $20.00...Good Luck

Posted on Feb 21, 2009

wyoed1
  • 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
Ed
NC Electronic
Mills, Wyoming

Posted on Jan 08, 2008

Benimur
  • 6966 Answers

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

Hi,

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

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

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

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