Dual PTT - No Audio Panel

Looking to see if anyone has a wiring diagram for a Dual PTT system using diodes and resistors. I don’t have room, nor do I want an audio panel. I also do not want a switchable unit.

I want to connect my com 1 (KLX135a) And my Com 2 (FL-760) and My SPA-20” intercom all together with 2 PTT switches. I want to hear both radios and talk on which ever PTT switch that I press.

Does anyone have a wiring diagram using diodes and resistors to help make this happen?

I’ve done a fair amount of searching. Most threads revolve around adding a switch or adding an audio panel.

Thanks!

Tinker.

You can do what you want with a small DPDT relay.

Each radio's output to a 500 ohm resistor. Tie other ends together, and tie that to the headphines.
Each ptt to one radio's key input.

My choice would be a single pole double throw switch for transmit selection. Each radio's key to opposite sides of switch, center terminal to a sinnle ptt switch.

Charlie