Question about Radio Communications
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
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
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
Posted on Jan 08, 2008
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
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
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