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Cobra 148 GTL 120-Channels Base CB Radio Questions & Answers
Tx red light is use to show what
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.
Galaxy echo 5 pin desk mike wiring to cobra 2000?
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 142 GTL feeback audio
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
-------------------------------X-------------------------------------X----------
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.
Voltage regulator
It is very likely that the reverse polarity diode inside the radio is shorted, usually because the radio was connected up incorrectly.
Rf out ok no modulation but mike ok
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.
Transmeteur out
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.
148 mic wiring white d104
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
Echo wires diagram
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.
Resibe no trasnmite
this rado has this problem and to fix it you should have the meter replaced.
Voice sounds robot
used radio ? If so some one tried to hook a toy into it to make it sound that way. Take the bottom cover off to look inside to see if there is any extra baggage.
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