Elusive mic wiring solution

[Greg T]

I really hate being a pest lately with all the questions. I'm usually able to figure th3ese things out on my own. But THIS one has me stumped. I want to use my M-1 Reference yaesu mic on my Stryker 955. Now, to preface this, I used a Turner +3 on my FT-990 before I purchased the M-1. The Turner only required 3 connections to work on the Yaesu. So, I want to make a short adapter to go from the 8 pin Yaesu to the 4 pin Stryker. Should be simple, huh? NO! I

The pinouts are:
Yaesu; ( skipping channel selectors)
8 = audio
7 = shield
6 = PTT

Stryker;
1 = Audio
2 = Shield
3 = PTT
4 = Receive ( radio does receive with no mic plugged)

So!! I connected 1 Stryker to 8 Yaesu
Then connected 2 Stryker to 7 Yaesu
Then connected 3 Stryker to 6 Yaesu

She doesn't transmit. So I tried using the receive wire to shield, to PTT, Nothing. The only way I can trigger the transmit is to SHORT 7 and 6 on the yaesu plug. What am I missing, here?? I tried all the other pins on the yaesu receptacle with no love. Shorting 6 and 7 is the only way to trigger TX.

 

[brandon7861]

I think pins 7 and 5 (MIC GND and GND) need to be tied together on the M1 before connecting to the stryker shield (2)

EDIT: if shorting 6&7 activate TX (MIC GND only), then it is most likely the fact the M-1 will not switch those pins closed without it's 5v power applied to pin 2 (see next post).

 

[brandon7861]

Also, the manual does not show a place for batteries, so I am assuming the microphone needs the 5v pin powered as well. Aside from the mic element and circuitry all requiring power, the M-1 uses a magnetic reed switch for the PTT function which is buffered via a solid state switch on the circuit board ~ which also needs power. That mic would not function at all without its 5v power applied.

 

[Greg T]

Also, the manual does not show a place for batteries, so I am assuming the microphone needs the 5v pin powered as well. Aside from the mic element and circuitry all requiring power, the M-1 uses a magnetic reed switch for the PTT function which is buffered via a solid state switch on the circuit board ~ which also needs power. That mic would not function at all without its 5v power applied.

Mic is powered with included wall wart. So, I should run a jumper between 5 and 7, and leave the shield where it is?

 

[brandon7861]

I would try that. I am guessing the MIC GND is not the same as GND and that the PTT shorts to GND rather than MIC GND. The stryker has a common ground for the mic and PTT, I'm guessing the M-1 kept them separate (which makes sense with the balanced XLR option).

Try this:
M-1 (8) to Stryker (1)
M-1 (7 and 5) to Stryker (2)
M-1 (6) to Stryker (3)

 

[Handy Andy]

Strykers effort to help with wiring a mic...

 

[Greg T]

I would try that. I am guessing the MIC GND is not the same as GND and that the PTT shorts to GND rather than MIC GND. The stryker has a common ground for the mic and PTT, I'm guessing the M-1 kept them separate

I would try that. I am guessing the MIC GND is not the same as GND and that the PTT shorts to GND rather than MIC GND. The stryker has a common ground for the mic and PTT, I'm guessing the M-1 kept them separate (which makes sense with the balanced XLR option).

Try this:
M-1 (8) to Stryker (1)
M-1 (7 and 5) to Stryker (2)
M-1 (6) to Stryker (3)

This did it! Much appreciated. Here it is with the adapter installed.

 

[Greg T]

View attachment 56937
Strykers effort to help with wiring a mic...

Yeah, I saw their attempt. Unfortunately, I'm always trying shit that isn't supposed to be done. LOL... It's just my nature.

 

[Handy Andy]

​

 

[Handy Andy]

This did it!

Nice Job!

 

[Greg T]

Nice Job!

Thanx! What really threw me off at first is using the Turner on the yaesu. Only 3 wires needed.

 

[Handy Andy]

Welcome to when life was a little less "automatic"....