Looking for how to wire an old +2 desk mic to a Royce 1-642 cb base station.

[danmcclain]

This radio was not included in the Turner mic wiring guidebook...thanks Dan

 

[TM86]

Going to be a bit of supposition on my part, since I don't have either the radio or the mic and am having to rely on docs found online.

Turner wire colors I got from KC9Q in this thread: https://www.worldwidedx.com/threads/turner-2-internal-wiring.133366/

White (audio) - Pin 1
Shield - Pin 2
Black - Pin 4

Set mic for electronic switching.

The reason for setting the mic for electronic switching is it is using the shield as a ground for the keying circuit. If the Turner diagram linked above is correct, when the PTT switch is pressed the black wire will be connected to ground if the mic is set to electronic switching. In relay switching, the black and the red wires would be connected together.

Also, the pins are based on the sister to this radio, the Pace 8193 and the schematic for that from Sam's CB 280. If it doesn't work with the black wire connected to Pin 4, check that the mic is set to electronic switching and then move it to Pin 3. Royce seemed to like having audio on Pin 1 and shield on Pin 2, so those shouldn't change.

In case I hadn't put enough disclaimers on here, proceed at your own risk. Since I don't have this particular combination of gear I can't say for sure what I've given you will actually work.

Good luck!

 

[danmcclain]

Going to be a bit of supposition on my part, since I don't have either the radio or the mic and am having to rely on docs found online.

Turner wire colors I got from KC9Q in this thread: https://www.worldwidedx.com/threads/turner-2-internal-wiring.133366/

White (audio) - Pin 1
Shield - Pin 2
Black - Pin 4

Set mic for electronic switching.

The reason for setting the mic for electronic switching is it is using the shield as a ground for the keying circuit. If the Turner diagram linked above is correct, when the PTT switch is pressed the black wire will be connected to ground if the mic is set to electronic switching. In relay switching, the black and the red wires would be connected together.

Also, the pins are based on the sister to this radio, the Pace 8193 and the schematic for that from Sam's CB 280. If it doesn't work with the black wire connected to Pin 4, check that the mic is set to electronic switching and then move it to Pin 3. Royce seemed to like having audio on Pin 1 and shield on Pin 2, so those shouldn't change.

In case I hadn't put enough disclaimers on here, proceed at your own risk. Since I don't have this particular combination of gear I can't say for sure what I've given you will actually work.

Good luck!

Thank you for your effort TM86

 

[TM86]

Thank you for your effort TM86

You're welcome. Although I feel kinda like that one friend we all have at some point:

"Here, try this. Looks like it should work"

Radio goes boom.

"Bummer dood, looks like that wasn't it."

 

[danmcclain]

You're welcome. Although I feel kinda like that one friend we all have at some point:

"Here, try this. Looks like it should work"

Radio goes boom.

"Bummer dood, looks like that wasn't it."

Disclaimers noted...lol

 

[groundwire]

Use a vom. You will get your answer in 2 min. Simple