2000 cobra

[nomadradio]

It's your radio to do with as you see fit.

I won't discourage people from trying to learn something new.

On the other hand, I'll admit to some shade-tree mechanic adventures I wished I had skipped.

The rule of the shade tree: "If it ain't broke, fix it until it is".

73

 

[loosecannon]

Jerry,

In reading through the thread, i haven't seen anyone ask you about the mic input of your 2000GTL.

so i will go through a couple of things to check, and they may be things that seem elementary, but we need to eliminate all the possibilities, so bare with me.

your 2000GTL will not have any receive audio if there is not a microphone connected.
you may be able to hear a tiny amount of audio with the control turned all the way up, but it will be too low to make anything out.

so, if you are now direct injected, then you still need a mic on the radio in order to key it, and to have receive audio.

if you do have a microphone connected to the radio and still don't have receive audio, then it is possible that the mic is mis-wired.

to test this, remove the mic from the radio, and get a short piece of wire that is stripped at both ends.

here is a pic of the jack on the front of your radio:

Pin 1 is lower left. = audio wire
pin 2 is just above it = audio shield wire
pin 3 is on top = receive wire
pin 4 is next to the right = RX/TX common wire (this is a ground wire used for switching from receive to transmit)
pin 5 is bottom right = transmit wire.


since your radio is direct injected, you don't need the audio or shield wires.
you just need to wire a mic with pins 3 4 and 5 soldered on.

the way to check your mic wiring is to use your jumper wire with the radio on, no mic connected, and jump pin 3 to pin 4 and see if that gives you receive audio.

if it does, then your problem is in your mic.
if it does not, then your problem is inside the radio.

please check these things and post back.
LC

 

[Jerry Davidson]

Loosecannon thank you for the tip I’m trying it now. All my pins are connected so I will just try connecting 3,4,&5

 

[loosecannon]

Jerry,
I just want to make sure you understand me correctly.

I didn't mean for you to connect pins 3 4 and 5 together, i meant you only need to put wires on those three pins.
your microphone will have the receive line connected to the ground wire while in receive mode, and when you push the mic button, it will disconnect the receive line from the ground line and connect the transmit wire to the ground wire.

so to check if your radio is the problem or if the mic is the problem, jump pins 3 and 4 together on the mic jack on the radio,

if you were to connect pins 4 and 5 together, your radio would go into transmit mode.

just wanted to avoid confusion.
LC

 

[Jerry Davidson]

Loosecannon I understood what you were saying. I think that was my problem because everything seems to be working right now. Thank you

 

[loosecannon]

you are very welcome!

please stick around the forum and use the search function. there is more good radio info on this site then you can shake a D104 at.
LC