Jack, What a great find!
As per my post earlier in the week, I simply took two 1/8" cables, one for line in and one for line out, wired them to a DB9M for the repeater controller (Arcom RC-210)audio in/out, and used a piece of multi-conductor shielded cable to connect to the COS, PTT, and GND pins. I then wired the other end of the COS/PTT/GND cable to a DB9F for the serial port. I simply wired the controller PTT to the pc's DCD pin (1) thru a 1N914 diode, and wired the controller COS to the pc's RTS pin (7) thru a 220 ohm resistor and 1N914 diode. I set the controller COS for active high. RTS provides a hi/lo transition that controls the presence of COS to the controller. The controller's PTT is internally pulled high at idle state due to the way the PTT LED is controlled in the RC210, so it provides a hi/lo COS condition to the pc. I think I needed to invert the COS setting in Echolink. We set the Arcom TX audio and RX audio pots at their mid position, and can easily adjust the audio in and out of Echolink via the sound card app just fine. The installation is working great, and the audio quality is perfect. Granted, no serial opto isolation or audio isolation, but in a clean repeater installation, it works fine. However, this board is a great deal for the price. It provides some added isolation on the audio and control signals for those who need it due to hum problems, and it may prevent additional damage if lightning gets into a repeater system. I wish I found this a long time ago. I've modified a handful of NOMICs for a few local club repeaters, adding a COS circuit internal to the box, and making custom cables to go from the NOMIC to the repeater controller. This board is everything needed to accomplish a clean interface from a pc to a controller. Thanks for the link. I will be buying a few real soon. 73 Eric KE2D --- In [email protected], "Jack Davis" <[EMAIL PROTECTED]> wrote: > > Repeater BuilderHow about $30 delivered for a kit? I have one of these and am very impressed at the quality of the parts and circuit board. Took about 20 minutes to assemble and it works great! It ships from India but it only took 7 days to arrive and it even includes the 5 pin DIN connector for the radio. I give it 5 stars! > > http://foxdelta.com/products/echolink.htm > > Jack > K6YC >
