Question about Radio Shack TRC-447 CB Radio

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It could be your power supply i had the same problem for a while

Posted on Jan 08, 2009

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Adjust the squeelch tuning, the antena is also a factor and the location, the main receive gain adjustment is inside the unit, rf transformer inside the unit in the receive stage of the circuit.

Posted on Dec 10, 2008

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1 Answer

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Need more info, what happens when you press the PTT? Anything at all, have looked inside the mic to see if its there? Have you tried to jump it at the mic connector. Maybe a mic cable? To many things to say, from a simple relay to mic cord.

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Have the mic checked first to make sure wired correctly and or wires not broken where connect to plug----also check to see if same on SSB and Am.

President what? Madison, Lincoln etc.

Apr 23, 2012 | Radio Communications

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Have you ruled out the speaker malfunctioning? Try hooking up an external speaker to see if it works a bit better. Also has anyone been inside the radio before and perhaps tried to do a receive mod to it? Sometimes it can be made worse if someone messes with it. Also who is giving you the receive radio check? Is it from someone fairly close? Also make sure the RF gain potentiometer knob on the front of the radio is tuned all the way to the right. There is a pot inside the radio than can be adjusted for receive as well or some coils. You have one of the best sounding base CB radios out there. Yet some insist on messing with it. Good luck. Any further questions, comments or concerns feel free to ask me.

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I have a president zachary t base station cb radio that squeals on ac power. what can i do to stop it

Hi coonhunter,
Welcome to FixYa.
My name is John. I will be assisting you with your issue.
Could I ask you to re-post, your question falls under something
different. I have BASE is that correct?

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Hi, my name is John. Welcome to FixYa. It will take a tune-up that involves some expensive meters. The tune-up should be only about $35.00 to $45.00. The 148 is a great radio, I have three myself and they are great. Only your local licence tech. can do it, or any CB shack. Good luck and thanks for choosing FixYa...John

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2 Answers

Won't receive or transmit

Here is a link to the user manual:

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