Wiring an external repeater controller to the VERTEX 5000 repeater using the DB25 connector. These are unnecessary if you are using the RJ telephone style connector. The audio is already gated on that connector.:

DB25 on Vertex:

Vertex pin 3 (TX Audio) to controller audio to XMTR

Vertex pin 6 (Discriminator Audio) to controller audio from RCVR (1Vp-p.. perfect for RLC or other controllers internally gating the receiver audio)

Verterx pin 12 (PTT) to controller PTT 

SIMPLE MODS

Here are a couple of "SIMPLE" mods on the Vertex for PL and COR logic...

Vertex pin 11 (NSQ DET) is an active low open collector capable of sinking about 100ma. For an "active low" logic for the RLC's, install a 10K pull-up between Vertex pin 11 and Vertex pin 2 (+13.8VDC). Install this inside the Vertex on the board that contains the DB25. Vertex pin 11 is connected to the controller pin 7.

Vertex pin 16 (TONE DET) is an active low open collector (like pin 11). Same as above, install a 10K pull-up between Vertex pin 2 (+13.8VDC) and pin 16. Now PL is "active low" and can be connected to controller pin 2. This is installed inside the Vertex on the DB25 board.

These operations on the DB25 board takes about 10 minutes and doesn't involve messing with sensitive parts. It's easiest to remove the board from the unit ( a couple of screws and two connectors ). With the software, setup the the unit in "Duplex" operation. In this mode, the Vertex is using it's internal controller. Here's the really cool part ! If you connect Vertex pin 13 (BASE Logic) to ground INSIDE YOUR MALE DB25, it tells the Vertex to have the RCVR and XMTR to work independantly so that your controller can take over. Yaesu calls this the Base (or SIMPLEX) mode. This allows you to have the Vertex revert back to a standalone repeater just by removing your DB25 Male !!! Really nice if your controller dies or you just want to take it off-line for some reason. The repeater keeps working. Just keep in mind that the Vertex doesn't have any ID'ers. Just hang time and time-out timers. 

GATE THAT AUDIO

Again, the audio on the Vertex DB25 pin 6 is not squelch gated. The COR follows a signal but the audio is constantly on. Not good if your controller can't handle it (as is the case with the ACC unit, I think).

Here is one way to modify the repeater slightly to send squelced audio to the DB25 connector. Look at the CTRL 1 or CTRL 2 schematic for the Vertex. The audio signal passes through each one but eventually goes to a cap and on to the audio amp driver. Once you find the right CTRL board, look at the top left of the schemtic. You should be able to find the RX audio section where it is transformer coupled and sent out the RJ45 (telephone) > jack.

What you want to do is remove the cap which removes the un-squelched audio. Then jumper from near the transformer to the wiring that ends up at the DB25. Finally, mark the repeater as having a squelched audio mod. This mod is almost identical to the TX audio mod described in the manual (if they are still doing it). 

ACKNOWLEDGEMENTS

Pinout information and controller modification by Craig Garcia, WB6LZV.

Gated audio modification by Doug Otoupal, N5HYD.

Information edited from discussions on the Repeater Owners Reflector. To join in send a message with the text being "subscribe repeater" to majordomo@repeater.net. 

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