The COR on the Alinco radios is an open collector that goes to ground when a signal is received. These radios can be configured as back-to-back crossband repeaters by simply connecting the interface of one radio to the interface of the other radio.
If you can configure the CAT 1000 for a negative going COR input you may only need to add a pull up resistor to the COR output of the Alinco radio to get it to transition. If the CAT 1000 requires a positive transition for COR input, you will need to add a transistor inverter in addition to the pullup resistor. 10K would be a good value to use as the pullup with one end connected to the COR output of the radio and the other end connected to + 12 VDC. If you need any help with the inverter, let me know. 73 - Jim W5ZIT --- On Wed, 3/25/09, Joe Landers <[email protected]> wrote: From: Joe Landers <[email protected]> Subject: [Repeater-Builder] cat1000 controller and alinco dr235t remote issue To: [email protected] Date: Wednesday, March 25, 2009, 8:25 PM I was wondering if anyone in the group has ever used a alinco 135/235/435 radio as a remote base with a cat 1000 controller. I have a issue with this setup not broadcasting what the remote receives. The radio broadcast what the repeater sends but does not go the other way. I am using the 9 pin connector on the radio. Thanks Joe Landers Ke4eue
