# Cable for Vertex VX-4100, VX-4200

**URL:** <https://forum.digirig.net/t/cable-for-vertex-vx-4100-vx-4200/10649>\
**Category:** Uncategorized\
**Tags:** vertex-vx-4200, vertex-vx-4100\
**Created:** [August 3, 2026, 4:50pm UTC](https://forum.digirig.net/t/cable-for-vertex-vx-4100-vx-4200/10649 "2026-08-03T16:50:51Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![K0TX](https://forum.digirig.net/user_avatar/forum.digirig.net/k0tx/32/3_2.png) [@K0TX](https://forum.digirig.net/u/K0TX)\
**Post date:** [August 3, 2026, 4:50pm UTC](https://forum.digirig.net/t/cable-for-vertex-vx-4100-vx-4200/10649/1 "2026-08-03T16:50:51Z")

</div>

Based on the pinout info from the [service manual](https://elektrotanya.com/vertex_standard_vx-4100-4200v_sm.pdf/download.html) (below), the Digirig audio cable will look like this:

DSUB-15 pin 1 (AF IN) → 3.5mm TRRS ring 1 (RIG\_AFIN)

- DSUB-15 pin 1 (AF OUT) → 3.5mm TRRS tip (RIG\_AFIN)
- DSUB-15 pin 1 (AF GND) → 3.5mm TRRS sleeve (GND)
- DSUB-15 pin 3 (EXT PTT) → 3.5mm TRRS sleeve (RIG\_PTT)
- DSUB-15 pin 15 (GND) → 3.5mm TRRS sleeve (GND)

The homebrew can be done with a breakout connectors:

- [https://www.amazon.com/dp/B07F9S61QT](https://www.amazon.com/dp/B07F9S61QT)
- [https://www.amazon.com/s?k=3.5mm+trrs+male+with+wire](https://www.amazon.com/s?k=3.5mm+trrs+male+with+wire)

Please report your builds.

 ![image](https://forum.digirig.net/uploads/default/original/2X/0/0d991bd8f4b02afb0375719de901e9e4401aff9b.png)