Question about Cobra 148 GTL 120-Channels Base CB Radio

2 Answers

Micgain when ever I turn my micgain up the it make a hight pitch sound.

Posted by on

  • Ronnie152 Mar 09, 2009

    mic squeal when mic gain is up all the way, used to not do this, problem just started, using any mic same thing.

×

2 Answers

My SWR is 1.1 so I thats out of it. Where do i find the regulator and the switching circuitry?

Posted on Jul 31, 2008

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Brigadier General:

    An expert that has over 10,000 points.

  • Master
  • 6,966 Answers

Hi,

Offhand, pls try:

  • If the high pitch sound (feedback) occurs during the receive, then you need to check the switch inside the microphone and verify that the audio line is not directly connected mic element wire; it should pass through the switch. Alternately, it may be the switch that is shorted. If you are using a power mic, you may have to lower the settings a bit or decrease the gain;
  • If the feedback occurs during transmit, you need to check the TX/RX regulator and switching circuitry. In some cases this would also be true if you are using a linear amp and the grounding is not adequate and/or the SWR relatively high.
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 Jul 31, 2008

Add Your Answer

Uploading: 0%

my-video-file.mp4

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

×

Loading...
Loading...

Related Questions:

1 Answer

Why do general lee has a high pitch,when RF power is on?


feedback thru the speaker . turn the rf gain down and stay away from the external speaker and you should be good.

Aug 25, 2015 | CB Radios

1 Answer

I can transmit & receive all channels but when i try to transmit on 40 i get a loud pitch on speaker


Sounds like the VCO is out of range on the high end of the frequency range which causes the synthesizer to go out of lock on channel 40. If you tweak the VCO coil slightly it might lock again. Make sure it still works on channel 1 after you have tweaked the VCO coil.

Oct 02, 2014 | Uniden CB Radios

1 Answer

Off frequency


you must lock in the channel then use the clarifier to tune them in

Mar 01, 2014 | Galaxy Radios DX-979 CB Radio with Single...

1 Answer

How do u take apart a 40 cal pistol


first of all if you don't know how to take it apart ask some one that does. Go to a gun shop and ask. you should make sure you have a permit for it also.

Nov 15, 2012 | CB Radios

1 Answer

I need to know what knobs turn which way and what buttons need to be on


Volume/Squelch control: As desired
ETone: Sets the sound of the echo as desired
MicGain/RF Gain control: Normally, leave fully clockwise
Band Switch: for CB, turn all way to left (a/e)
Mode Switch: Selects how you modulate the radio. Normally, you will operate on AM, USB or LSB.
Fine/Coarse control: Changes the frequency you operate on. Normally, set so the frequency counter reading ends in 5. (center slot of the channel).
Buttons:
RB: Roger beep. Turn on or off as desired.
NB/ANL: Noise limiters. Leave on.
Frequency Counter: Turns counter lights on and off.
+10 KHZ: Allows you to get the channels missed by the Channel knob. Normally, leave off.
Power: Selects either high or low transmitter power setting.
Band: Selects band of operation. Low (A-D) or High (E-F)

Jun 12, 2011 | Galaxy Radios DX- 88HL Base CB Radio

1 Answer

1991 Ford 350 truck, in dash cassette player high pitch noise


Hi rayc

sounds like the motor that pulls the tape mechanism is probably about to give problems and is getting electronically noisy. The cb may need to hooked up some where else to power so you get away from dirty power as well as maybe move the cb farther away from the tape player. hope this helps.

Ray

Aug 31, 2009 | Maxon MCB-40 40-Channels Handheld CB Radio

2 Answers

Cb radio does not transmite


You might be having a dead key problem. Do you run a power mic? if so check the battery in it if you dont run a power mic then your have RF gain problems. Take it to a local cb/truck stop and get them to look at it.

You didnt open it up and mess with it did you?

Jan 25, 2009 | Cobra 29 LTD CB Radio

1 Answer

Mic not Keying up


Sounds like you are not modulating well. try adjusting your amp.also, test your antenna for wire breakage and, make sure that your mic has good wires as well.

Jan 22, 2009 | Uniden Bearcat Pro PC78XL 40-Channels Base...

Not finding what you are looking for?
Cobra 148 GTL 120-Channels Base CB Radio Logo

98 people viewed this question

Ask a Question

Usually answered in minutes!

Top Cobra CB Radios Experts

AnyMHz.com
AnyMHz.com

Level 2 Expert

489 Answers

Iron
Iron

Level 3 Expert

3018 Answers

Brad Brown

Level 3 Expert

13530 Answers

Are you a Cobra CB Radio Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...