Interfacing Kenwood radios to GAI-Tronics consoles.

[hillbillyrelaytech]

I am in the process of interfacing a NX-3720 to a GAI-Tronics console. I am using an ITA-2000 tone remote adapter, but am having problems.... I have it working well in analog mode, but when I switch the channel ( through channel steering) to a digital channel, I loose PTT and receive audio. I am connected to the aux port on the back of the radio. I think I am getting discriminator audio out of the radio instead of AFO, I think there is a mod to take care of this, but what about the PTT? Another question deals with the signal input, would doing the mod to change the input from DI to MI2 take care of this?

TIA
HRT

 

[mmckenna]

From the service manual:

2.3.6 Changing of Signal Type
2.3.6.1 Change signal output of D-SUB connector from DEO to AFO
The output (4pin) of D-SUB 15-pin connector is configured at the
DEO as the default value.
Remove the R613 chip jumper and solder the chip jumper to R612.


2.3.6.2 Change signal input of D-SUB connector from DI to MI2
The input (5pin) of D-SUB 15-pin connector is confi gured at the
DI as the default value.
Remove the R659 chip jumper and solder the chip jumper to
R601.