Elettronica e Radiotecnica > Microfoni

How connect a Zetagi MB+5B to Yaesu FT-8900

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DannyBranderhorst:
Hello, i just search on the internet if someone already connect Zetagi MB+5B to a Yaesu FT-8900. There are many pictures and discussions about this. But i don't see a good picture with wires connected welded inside the Zetagi MB+5B pcb and RJ45 to Yaesu.
I will send my pictures of the Zetagi MB+5B.

Picture: 20211205_175751.jpg are original picture when i open the Zetagi MB+5B
Picture: 20211206_183749.jpg are a picture after cleaning and removing the solder flux
Picture: 20211206_194418.jpg are component side of pcb

Picture: Yaesu FT-8900 mike connection.JPG (pin in/out Yaesu)

Someone any tips or pictures, how you do it?

All information are welcome,

Greetings Danny

AZ6108:
Hi Danny, the schematics and make/break pins are here

https://www.radioamatore.info/home-osm/90-microfoni/1107-zetagi-mb5

HTH

[edit]

also see

http://radioaficion.com/mods/zetagi-mb5-mod-and-schematic/

http://www.radiomanual.info/schemi/ACC_microphone/Zetagi_MB%2B5_user.pdf

and

http://www.qsl.net/g4wpw/ft8900.pdf

the 8900 ptt closes to gnd for tx, so referring to the schematics above, the wiring should be pretty straightforward, notice that the yaesu also offers a +8VDC at the mic plug and you may use it to power the mic preamp

DannyBranderhorst:
I will give a response when i finished it.

Many thanks for your quick reply. I found the problem, but my wife rings the bells to eat.

trodaf_4912:
When the wife calling, you must standup and run !!

AZ6108:

--- Citazione da: DannyBranderhorst - 08 Dicembre 2021, 18:42:05 ---I will give a response when i finished it.

--- Termina citazione ---

Absolutely, please keep us updated


--- Citazione ---Many thanks for your quick reply. I found the problem, but my wife rings the bells to eat.

--- Termina citazione ---

When SWMBO calls...

[edit]

If I'm not wrong the wiring should be as follows



with such wiring the microphone will be powered directly by the 9V from PIN #3 of the rig connector so won't need a battery, the other connections should be pretty clear (PTT, MIC and GND), the other PINs (1 and 2) of the rig connectors will be left unconnected

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