This is the setup - very basic.
The attached video shows the fault where the QMX drops out after a short (aprox 4 second) transmission.
In this video the "Pulse" when TX begins was not as obvious.
This morning it was very hard to catch the fault - this afternoon it is 2 out of 3 Transmission cycles.
Now that I am watching for it - it is happening on both the Hi & Low band QMX's. (But no sign of either the dropped Tx or Pulse on the KX3 - with same cables pc etc)
At the moment - it happens more often on the Antenna -but it occasionally happens on the Dummy Load as well.
As mentioned previously - different USB sockets, Cables, RF Cables, Power Cables & Supplies - make no difference.
Chokes etc on the antenna cable also had no effect.
The antenna is resonant - see SWR Meter in video.
Cheers
Rob VK5ZIK
Rob VK5ZIK