COLT EXCALIBUR SSB INFO NEEDED

[long night]

Hi to mall. I need a picture of a Colt Excalibur SSB mic plug in that is facing the radio and shows the pins and slot ridge the mic fits over. Can you number the pins and show what each number relates to and the wire color for each also. A hand drawn picture would work fine.

Thanks for all your help
Chuck Saylor

 

[long night]

Just to clarify I need a picture of the radio plug in for the mic.
Thanks again.

 

[loosecannon]

can't seem to find a schematic of that board, but if it's a 4 pin mic plug its most likely just like all other galaxy style radios.

However there is another way i might be able to help you, and this will help you determine the mic wiring of any radio you come across.

start with the radio off, and the top cover off. using a voltmeter set to read continuity, put one lead on PC board ground (not the radio chassis), any metal tuning can will work for this.

now put the other lead on any pin on the mic jack.
keep checking pins until you find one that shows continuity to ground.
that is your shield pin. make a diagram and mark it that way.

now turn the radio on.
get a jumper wire and put one end on your shield pin that you just found, and put the other end on another one of the pins.

you will notice that one of the pins causes the radio to go into TX mode.
mark that one on your diagram as the TX pin.

another pin will cause a squeal in the speaker, and that one is your audio wire.

the one left over will be your RX wire.

hope that helps.
LC

 

[guitar_199]

If it is electronic switching... when you touch that ground wire to the RX line... usually the speaker will come on and you will hear hiss/noise. That is because when the mic is unkeyed... these radios usually unground the speaker so it does not work in transmit..

 

[NZ8N]

RigPix Database - CB, "Freeband" and more - Colt Excalibur SSB Model 1200

If it is a PTBM main board (Cybernet PLL02A), the mic pinout is upside down from Cobra/Galaxy pinout (1 <-> 2 and 3 <-> 4).



I edited this from my last post about this (Colt Excalibur mic pinout) now showing the notch at the top.

 

[long night]

can't seem to find a schematic of that board, but if it's a 4 pin mic plug its most likely just like all other galaxy style radios.

However there is another way i might be able to help you, and this will help you determine the mic wiring of any radio you come across.

start with the radio off, and the top cover off. using a voltmeter set to read continuity, put one lead on PC board ground (not the radio chassis), any metal tuning can will work for this.

now put the other lead on any pin on the mic jack.
keep checking pins until you find one that shows continuity to ground.
that is your shield pin. make a diagram and mark it that way.

now turn the radio on.
get a jumper wire and put one end on your shield pin that you just found, and put the other end on another one of the pins.

you will notice that one of the pins causes the radio to go into TX mode.
mark that one on your diagram as the TX pin.

another pin will cause a squeal in the speaker, and that one is your audio wire.

the one left over will be your RX wire.

hope that helps.
LC

Very helpful information! Thank you loosecannon!!!