Question about Radio Shack TRC-503 CB Radio

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When the mic is keyed to talk , sends a signal but no sound on the other end

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Turn up the mic gain. and or try a different mic.

Posted on Nov 25, 2010

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1 Answer

I have 2 cobras 29 radio always worked good till recently. Have a rk56 mic I can hear but can't talk. Mic keys up but they hear nothing bought a new 29 chrome digital read out and a new mic just a wood...


If you are saying that you put out a signal but they can't hear your voice, the battery in your microphone is dead or the 9 volt battery clip that plugs onto the battery may be broken. Try the battery first since a new battery should make the light come on and your voice to modulate your signal so people can hear you. :-) Mr. 44

Aug 26, 2014 | Radio Communications

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I have a connex 4600 turbo with a road king 56 noise canceling mic. My mic just started making a cracklin sound in my external speaker . It also shocks and burns me. When I key up and let go it stays keyed...


Sounds to me like the RF signal is leaking into the microphone. Check the cable to the microphone and see if the ground wire is bad. Check the SWR to see if it is high. The problem you are talking about is unusual.

Jun 28, 2013 | Radio Communications

1 Answer

I have a Cobra 148GTL with a 5 pin side mount mic. My problem is that the radio powers up and all I get is a static type noise but no recieve and when I key the mic the meter shows I'm sending a signal but...


sounds like a bad mic....At the 5 pin end u will see a small screw take out that screw and slide the pin cover back and you will see the 5 wires going to the pins my bet 1 or more of those ends are broken all you ned is re sod. them and all will be good .....I buy alot of broken mics and all i need do is fix the wires easy fix .....

Nov 13, 2009 | Cobra Radio Communications

2 Answers

Cb is Keying Down instead of keying up when trying to talk


if you are transmitting fine Don't worry about the meter. Get an external SWR meter, they are better anyway.

Also, make sure the the switch next to the meter is all the way up on s/rf setting. thats for signal power and receive strength.

Aug 30, 2009 | Cobra 29 WX NW ST 40-Channels Base CB...

1 Answer

Intel D865GBF, having sound-max, is not giving signal to speakers. While using sound-max wizard mic input signals are shown, but there comes no sound in speakers while testing it...


Goto the your Start button, control settings, sound, click advanced, make sure your mic is not muted, and the proper input is selected(usb, or however you mic is connected.) Make sure you get levels here when talking or tapping the mic lightly. Sound max should work if this is set correctly.

Jun 24, 2009 | Intel D865GBF Motherboard

1 Answer

Mic is popping


It sounds to me like you have a short in the cable. Power up unit like normal and move the wires at each end of the cable, mic end and connector end, being careful not to move the mic. If you hear popping it's a bad cable. If not, now gently shake the mic, does it pop, then it's your mic's capsule and needs replacement.

Apr 03, 2009 | Shure ULX1 Body-Pack Transmitter...

1 Answer

Conversation?


Hello Thesilent1,

The other guest, has hit a very good point have you tried checking your mic? If not try changing it out. If you still have a problem do this; get a power meter and connect it to your antenna jack of the CB and the other end of the meter to the antenna this will put the meter in series with the CB and the antenna. then try to key the mic and speak, if the meter indicates 4watts PEP then the transmit function is working and you are getting out. The second test is to set an RF generator to 27.185MHz at -123 dbm or 5.1x-16 watts and use a 1kHz tone to modulate the signal, couple the signal to the antenna with an insulated wire loop and this will allow you to test if you can receive signal. These two tests will show if you can transmit and receive. I believe the problem is with your mic, but I have provided two tests that will prove if you can transmit and receive, so you are ready to test. Let me know how it goes.

Thank you,

Shuttle83

Oct 31, 2008 | Midland 1001Z 40-Channels Base CB Radio

1 Answer

When I Press the mic to talk, others hear me key down, but no sound is transmitted


Hello lummox30,

Check you mic first to see if it is indeed working. Then if it is the below advice is applicable.
It sounds as if your TX audio amplifiers might be malfunctioning or the TCXO might be bad. If you have a background in Electronics I would suggest that you open up the unit and using a dummy load on the antenna check the two TX audio amps to see if when you key the mic and speak into it the amplifiers are amplifying your voice and sending it to the modulator. If the problem is not amps or the filters in between the amps, the modulator and the VCO buffer are suspect. If the TCXO is being modulated I would check the PPL IC and the Drive amp to see if the modulated signal is getting through. The last two checks I would perform are on the final amp and the TX switch prior to the antenna jack.

If you do not have a background in electronics, still check your mic, but the rest of the above advice can be done by a qualified Radio Technician.

I hope this helps,

Thank you,

Shuttle83

Oct 01, 2008 | Maxon MCB-30 40-Channels Base CB Radio

1 Answer

Mic effects


The short answer is that you'd use the multi effect (or one of the 4 mic effect) to one channel for effecting your mic input. Reverb should be added later using the single effect. You'd send the already recorded track to the send effect and then return it to another track and 'print' it using a bounce. 'Send' sends the signal to the effect and returnsit to the mix bus. So to add reverb to a track you'd send that track to the single effect after configuring the reverb effect the way you'd like it, and then make sure all of the other are turned down and record it to an open track during a bounce.
The single effect is what would be referred to as a 'send effect' and is designed to be used at mixdown or during a bounce. In the 2488 the single, aux and send effects are all 'send effects'. These take an existing sound and change it. Examples are reverb, chorus, delay, phaser and flanger. The internal effects on the 2488 can be used or external sound processors can be fed with the sends and returned to inputs on the 2488.
The 2488's multi-effect, as well as the mic x4 effects are 'insert effects' to be used on the input signal when recording. Examples of insert effects are compression, expansion, gating, limiting and distortion.
You can send all channels (or multiple channels) to the same effect send, but they all must be sent to the same effect (or chain of effects) at once. You cannot for instance send channels 1,2 and 5 to one send effect and 3 and 4 to another at once. You'd have to do something like that in two seperate operations.
Insert effects cannot be shared among channel strips. Each sound source needs its own insert effect. The 2488 has one multi-effect box which acts like an effect chain on one channel or 4 mic effects which can be assigned to 4 mic inputs at once. Each input assigned uses one of the mic effects up (a stereo pair will use 2) of the available 4.
The main thing to remember is that there are the 2 different effect types. Sends are for adding something to the signal like reverb, chorus, delay, phase shift, flange (on the 2488 these are the single effect and the aux send effects) while insert effects act on the signal modify or subtract from it (compression, gate, limiter, distortion).

Hopefully this helps. I know it can be quite confusing starting out.

bd.

Jun 26, 2008 | Tascam 2488 Portastudio Multitrack...

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