DB20G / AT-779UV microphone pin out for use with SM01 desk microphone

[WRPH745]

Good evening,

I trying to figure out if the SM01/FP01 desk mic and foot pedal are compatible with my DB20G / AT-779UV.
I have the pin out diagram for the SM01 but I can not find the microphone pin out for the DB20G / AT-779UV.

Does anyone have the pin out diagram for the DB20G / AT-779UV?

Thanks

Robert

[MichaelLAX]

I'll do some research, but may I see the SM01/FP01 pinout please?

Which of these four cables do you have:

 

[WRPH745]

Michael,

I haven't bought it yet.  This is what I am looking at https://www.amazon.com/gp/product/B0BFGPK8GM/ref=ox_sc_saved_image_1?smid=AJFR970E0U757&psc=1

Since both have RJ45 I assumed I would have to go that way.  The problem is without knowing the pin out of the DB20G I don't know if a straight through cable will work or whether I will have to make an custom cable, and what the wiring of the custom cable would be.

I did  contact Radioddity support and they sent me the a dimensional diagram with no no pinouts and I emailed them back and  so far no answer

Thanks for your assistance.

 

 

[MichaelLAX]

I'd be mildly surprised if a straight through cable would work.

I sent out a comment to a YouTuber who discusses an extension cord to this model using of course a male/female RJ-45 cable.  Perhaps he has gone into the radio and determined the pin-out as well.

Here is some Miklor tech data for microphone and USB cable pin-outs, but the AT-779UV is specifically mentioned here; although Miklor does separately review that model:

https://www.miklor.com/COM/UV_Technical.php#spkrmic

What is the source of that cable pinout you posted? That's the SM01?

Hopefully Radioddity will be more helpful.

[wayoverthere]

Tagging this for a later look.  I currently have one of the radios out of the car; I may have some time on my hands tonight, and if so i'll see if i can crack the mic open to at least see what the colors are coming in from the cord, and where they go.

[WRPH745]

18 minutes ago, MichaelLAX said:

What is the source of that cable pinout you posted? That's the SM01?

I emailed Ailunce and they sent me the pin-out diagram.

Thanks

[SteveShannon]

If you want to try and figure it out, here are pictures of the circuitry inside the microphone.

 

[MichaelLAX]

Steve:

Following the colored wires coming out of your Mic; here is the other end of the cable:

And you clearly can see Red, Brown, Yellow from the top end and...

I think it is two spaces then White and then a space and then Grey; leaving Black out, or am I missing Black?

That could be a braid just before White and perhaps Black is stripped to just leave the braid connected.

Now compare that to the Ailunce pin-out and it looks like they could match, depending upon polarity of up/down.

[wayoverthere]

1 hour ago, MichaelLAX said:

Steve:

Following the colored wires coming out of your Mic; here is the other end of the cable:

And you clearly can see Red, Brown, Yellow from the top end and...

I think it is two spaces then White and then a space and then Grey; leaving Black out, or am I missing Black?

That could be a braid just before White and perhaps Black is stripped to just leave the braid connected.

Now compare that to the Ailunce pin-out and it looks like they could match, depending upon polarity of up/down

Looking end-on, I think it's one space after yellow, then the black...it's hard to tell though.

[WRPH745]

I just realized something tonight.  The Retevis RA25 is the same hardware as the DB20G / AT-779UV.  I just sent an email to Retevis tech support if the radio and microphone are compatible since the carry both.  I'll let you know what they say.

Thanks again to both of you for your help.

[SteveShannon]

5 minutes ago, WRPH745 said:

I just realized something tonight.  The Retevis RA25 is the same hardware as the DB20G / AT-779UV.  I just sent an email to Retevis tech support if the radio and microphone are compatible since the carry both.  I'll let you know what they say.

Thanks again to both of you for your help.

Based on the markings on the PCB in the microphone housing it would appear that the hardware Anytone is the OEM. 

[MichaelLAX]

4 hours ago, WRPH745 said:

I just realized something tonight.  The Retevis RA25 is the same hardware as the DB20G / AT-779UV.

Except that in my experimentation, the Retevis Ra-25 codeplug software will not accept code plugs for the Anytone/Radioddity.

4 hours ago, WRPH745 said:

I just sent an email to Retevis tech support if the radio and microphone are compatible since the carry both.

Of course: Good thinking! 

[WRPH745]

I asked Retevis if I could use the SM01 with the radio using the RJ45 cable or would I need to make a custom cable?

I received back that the the two are incompatible. I assume the issue is all the control buttons on the stock  microphone.

Thanks for all your help.

 

 

[MichaelLAX]

It was a fun intellectual exercise in any event...

[SteveShannon]

15 minutes ago, MichaelLAX said:

It was a fun intellectual exercise in any event...

And possibly useful if anyone everwishes to put two of these radios together for full duplex communications, either repeater or fixed station, or possibly for ISS communications.

[MichaelLAX]

Yes and next time I am in Tampa, I can change the offset away from 5 MHz to avoid those boats! 

[WRPH745]

I finally found a pin-out for the radio. https://www.project-ats.com/connecting-to-anytone-at-779uv/

Quote

Please remember that the colors of the wires might vary, but the PIN order here is correct. As always, if in doubt you should use a multimeter to measure. The pin out is as follows, going from right to left;

1. Red (ground)
2. Black
3. Yellow (positive mic)
4. Green
5. Uninsulated (ground mic)
6. White
7. Blue (5V positive out)
8. Grey (PTT control)

 

Retevis  said the SM01 was incompatible but I wonder if it would be if I made a made a custom cable.  I am thinking the incompatibility is the cable not the mic itself.

I do have one question. The radio has a ground and a mic ground and the SM01 has a ground.  Which grounds would one connect?  Should the SM01 ground be connected to the ground or the mic ground of the radio?

 

Thanks

 

[wayoverthere]

I would suspect mic ground, and that at least some of the"incompatibility" may be inability to access all the functions on the normal mic.

I'm thinking it should be possible,nwith the right wiring, to have ptt and audio working though

[SteveShannon]

2 hours ago, WRPH745 said:

I finally found a pin-out for the radio. https://www.project-ats.com/connecting-to-anytone-at-779uv/

Retevis  said the SM01 was incompatible but I wonder if it would be if I made a made a custom cable.  I am thinking the incompatibility is the cable not the mic itself.

I do have one question. The radio has a ground and a mic ground and the SM01 has a ground.  Which grounds would one connect?  Should the SM01 ground be connected to the ground or the mic ground of the radio?

 

Thanks

 

Use an ohmmeter to see if the mic ground has connectivity to the radio ground. If it does then it doesn’t really matter. 
If not, then connect the mic ground to the SM01 ground. 

[WRPH745]

I received the SM-01 microphone and foot pedal yesterday.  I did have to rewire one connection.  The PPT connection was different between the microphone and the radio.  The other 3 connections were the same.  One thing to note you have to do ground wire to ground wire and not worry about the mic ground for it to work.

To fix the PPT connection you have to wire the orange striped wire that connects to the radio to the brown stripe wire that connects on the microphone assuming you are using a T568B coded Ethernet cable.  Of course you could just cut off an end and reconnect an end with moving the PPT to the correct spot and crimp on a new end.  I didn't have any RJ45 connectors on hand so I did a splice in the middle.

I tried the microphone out today and people said it sounded fine.  The downside is you lose all controls on the microphone but if you need to be hands free it is a nice trade off.

Thanks again for everyone's suggestions.

 

 

[MichaelLAX]

Nice work!

Can you build a "parallel" RJ-45 device that allows you to plug in both mics, but not connect the regular mic to sound and then use it just for button access?

[WRPH745]

Michael I think you are on to something.  I could take the 4 remaining wires wire those to a female RJ45 jack and splice into power and ground and that should work.  The stock microphone would just plug into the female jack.

 

Thanks for the idea.