Motorola accessory socket adapter

In order to be able to easily connect the accessory socket from the back of Motorola transceiver (types GMxxx ,…), I realize a small PCB which allows:

  • Connect 12V to allow automatic re-ignition after loss of power
  • To adjust the audio level of the reception
  • To connect an interface assembly such as MMDVM or SVXCard via a 6-pin mini-DIN cable
  • To allow the transmission of the RSSI signal level voltage to the mini-DIN

The diagram is as follows.

Diagram in PDF : Motorola Mini Din adapter

Platine adaptateur connecteur Motorola mini-DIN

Gerber file to download : Gerber Motorola

The adapter kit for Motorola and its PCB may be available through grouped purchases on ShopChip


If you would be interested to participate in a possible future new grouped order (MMDVM board, SvxLink Card), leave your email below to be reported!

8 thoughts on “Motorola accessory socket adapter

  1. Will u publish the gerber files for the Motorola adapter boards?

    Allez-vous publier les fichiers gerber de la platine adaptateur Motorla ?

    1. Yes Florian it is. Included in this post.
      Oui Florian, c’est le cas. Inclus dans l’article

  2. Will you list the material Motorola adapter boards?
    Pouvez-vous lister les composants des platines Motorola?

    1. Like you can see it on schematic, just a MiniDin 6 pol, a 2 rows flat connector (2×8), a 10K potentiometer and some pin header for testing…

      Nothing very complicated to find. Some kits are still available on
      Comme vous pouvez le voir sur le schéma, juste un MiniDin 6 pol, un connecteur plat 2 rangées (2×8), un potentiomètre 10K et quelques pins pour tests…
      Rien de très compliqué à trouver. Certains kits sont encore disponibles sur

  3. Will the board Mini Din Adaptor board work with the CDM -1250s?
    If so can I order them to finish wiring cable for two CDMs 1250.

    La carte adaptateur Mini-Din fonctionnera-t-elle avec les CDM-1250?
    Si oui, je peux en commander pour de finir le câblage de deux CDM 1250.

    1. Yes, the “center” of the CDM1250 connector is standard as it is clearly visible in this image.
      (Translation)Oui, le “centre” du connecteur CDM1250 est standard tel que cela est visible sur cette image.

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