Top 20 Cobra 148 GTL 120-Channels Base CB Radio Questions & Answers

check the am voltage regulator. you should have 12vlts on pin 1 ,4volts on pin 2 ,13 vlts on pin 3 . go to ( CB tricks .com ) its the same board layout as galaxy 44 . if you are looking at the board on solder side ,knobs faceing you ,it is located on top left hand corner ,about 1 inch down you will see the slot cut into the board .if you have vlt on pin2 less than 4vlts or higher than 8vlts its bad. Galaxy DX Radios DX44V Service Manual its (tr) 51
Galaxy DX Radios DX44V Service Manual

Cobra 148 GTL... | 324 views | 0 helpful votes

when you are not talking the light should be an aqua / green color.When you transmit it should turn red. if you see two red lights your antenna is out of match.As for your radio not get out you have to get a friend to listen on another radio and he will tell you if its working or not.

Cobra 148 GTL... | 89 views | 0 helpful votes

before you go thru all the trouble of wireing it ,what kind of radio did the desk mic come from.If it came from a galaxy then you shouldn't have to change a thing. 5 pin to 5 pin try it then if you have to wire it.

Cobra 148 GTL... | 221 views | 0 helpful votes

a cold solder joint, or bad A.M. voltage regulator

Cobra 148 GTL... | 42 views | 0 helpful votes

try some canned air on the final to cool it down .If the radio comes on then you have the problem child.

Cobra 148 GTL... | 85 views | 0 helpful votes

put on a different mic and see if it still happens.I am going to attempt to draw an insert so if it works follow it if it doesn't I'll explain it.
this wire is the audio on the inside of mic
-------------------------------X-------(4700ohm 1/4 w res) ----X---------
.001 .001
this wire is the shield
at the point marked with X take two .001 capasitors and wire them from one wire to the other. this should make your squeal go away.

Cobra 148 GTL... | 74 views | 0 helpful votes There is is another one just stay at cb tricks .com and you'll see the other one .

Cobra 148 GTL... | 159 views | 0 helpful votes

turn squelch all the way to left.turn RF gain all the way to right.Turn mic gain all the way to right.Turn radio on low and then adjust volume.It should come on and transmit Could be a broken tx wire in mic.If it still doesn't come on take it to a tech.

Cobra 148 GTL... | 62 views | 0 helpful votes

could be a blown tx diode in would be better off taking it to a tech and let him fix it then to mess with it and have something else go wrong.

Cobra 148 GTL... | 564 views | 0 helpful votes

It is very likely that the reverse polarity diode inside the radio is shorted, usually because the radio was connected up incorrectly.

Cobra 148 GTL... | 391 views | 0 helpful votes

Hook up a speaker to the PA jack on the back of the radio. Put the CB into PA mode and see if any audio is coming out of PA jack. This will tell you if the AUDIO AMP IC TA7222 is good.

Cobra 148 GTL... | 84 views | 0 helpful votes

why waste your money on an echo board .you should buy an echo chamber . They operate on the outside of the radio so people that don't know how to wire one in can still have one.the echo board should have come with schematics,if it didn't you may have to google it to get the schematic you need.

Cobra 148 GTL... | 169 views | 0 helpful votes

five pin /4 pin? (white D-104?)
five pin= 1-audio,2-shield,3-RX,4-comm,5-TX
4 pin=1-shield-comm,2-audio,3-TX,4-RX

Cobra 148 GTL... | 209 views | 0 helpful votes

this rado has this problem and to fix it you should have the meter replaced.

Cobra 148 GTL... | 38 views | 0 helpful votes

need to get a watt meter hooked up to then go the where the final is and look aroung for a tuning slug marked L38 and that is the baby you have to turn in order to power down this radio.

Cobra 148 GTL... | 652 views | 0 helpful votes

I have a a uniden teddy r that won't recieve.

Cobra 148 GTL... | 138 views | 0 helpful votes

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