Tom W3FRG wrote:
I wired my own 1/8" adapter to XLR for my AT1300 mike.
I had an old RG45 cable and cut off 8" with connector and wired it to a 3 pin XLR Connector.
You need to ID the wires /pins on the RG-45: Pins 4 & 6 are the mike element and pin 7 is ground.
On the XLR connector Pin 1 is ground where pins 2 & 3 are the mike element.
(On the 1/8" TRS Plug, sleeve is cable shield. The ring and tip are the mike element connections.)
This info is also in the manual for the SDR2 Dx
GL Tom W3FRG
If you plan on using the MIC1 (jack, you better plan on a voltage blocking cap- in your setup
the 781 DOES NOT HAVE A VOLTAGE BLOACKING CAP and there is a constant Voltage on Mic1 connector, it CAN NOT like other radios be turned off (BIAS voltage is Always present)