Question about Cobra 148 GTL 120-Channels Base CB Radio

2 Answers

Trying to hookup echo board

I cant find the auido wire from mic to board

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Just look up cobra 148 mike wiring diagrams and see which pin on the mike is audio then look where that pin hole goes in on the mike socket in the cb then solder your audiowire to that spot on the inside part of your mike socket

Posted on Dec 30, 2008

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Take it to the cb shop it requires some soldering skills and time

Posted on Dec 06, 2008

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1 Answer

I need a schematic for a LT2 echo board to install in my president grant PC-409AB


break audio line. J2 input goes to mic pin J1output to radio.
(leave the shielded ground wires disconnected. on audio)
Power use a 1k ohm resistor from 12v dc on pwr switch.
Ground run the ground wire to board ground
test and set echo level.
this will work for any radio. if the echo needs 12v instead of 8v remove the 1k resistor and just use a 1n4001 diode on the power wires . some models require 12v some are 5-8volts.

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you would have to look at the wires in the mic also. 99% are wired for cobras./galaxy's etc..
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4 Answers

Feedback problems with astatic echo boards


This is a classic indication of a lost shield or ground connection in the mic circuitry. Double check these connections for good contact in the mic *and* the plug at the other end of the cable.

Check the grounding and SWR or "match"of the antenna system, too. A poor SWR (greater than 1.5:1 or 2.0:1) can cause the reflection of RF back to the radio. Modifications can increase sensitivity of the mic to this unwanted RF.

Sep 29, 2009 | Cobra 148 GTL 120-Channels Base CB Radio

1 Answer

I have a deisel 4-7 echo mic ineedcolor to pin to wire it to a Cobra 29 ltd classic thank you so much


cobra:black--ground
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the wiring for the echo mic is identical

Sep 16, 2009 | CB Radios

2 Answers

Looking to install astatic echo board in uniden PC78XL


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Jul 04, 2009 | Cobra 29 WX NW ST 40-Channels Base CB...

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I suggest buying a 5 pin to 4 pin adapter. Ebay has them for $6. I would go chopping wires on the mic. Cobra 29 ltd is a nice radio. Have one myself.

Apr 25, 2009 | Cobra 29 LTD CB Radio

1 Answer

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Take the mic plug apart and look at it the wire with the shield around it is the audio, then look and see which pin it hooks to.

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1 Answer

Cobra 200


Hello Jim. These radios do not work well with any power mic including the power echo mics because they have good modulation boards in them. But if you still want to try then check http://www.cbtricks.com/radios/cobra/200gtl_dx/index.htm

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