> It looks like the DB-9 comes straight to JP2 and doesn't first go > anywhere in the radio?
B+ and GND are connected elsewhere, so those can't be reassigned - hence the weird pinout on the T2-301 that doesn't match anything else. > Then you're passing power, audio, and other data back to the transciever > on JP1? is this correct? Yes. > So I "should" be able to use the "in" point (pad 2) at the ips5451S > location to enable my 5vdc 1A power supply (enable it not power it), > then take my now switching via the "Power" command 5vdc out, cut the > trace at JP2 pin 3 for 5vdc and tie my switching 5vdc to pin 3, which > would turn on and off 5vdc at pin 3 on the DB-9? The board is set up to accept power on the + and - pins, and to switch power to the radio through the VN920/IPS6021. Without the switch installed, you could use the control pin as a signal to control some external device. Scott N1VG
