The GE Phoenix as a Full Duplex Receiver
Idea by Jim Reese, WD5IYT
Implementation by Joe Jarrett, K5FOG
Here is a procedure to modify the Phoenix radio for full-duplex receiver operation.
Schematic of the interconnect cable.
Schematic of the control head wiring.
| Image # Thumbnail | Description |
| 01 | An unmodified Phoenix |
| 02 | Removing the front panel |
| 03 | Removing the front panel (detail) |
| 04 | Front panel removed |
| 05 | Display board before removal |
| 06 | Closeup of the display board |
| 07 | Removing the display board |
| 08 | Back side of the display board (now removed) |
| 09 | Front side of the display board (now removed) |
| 10 | Front panel missing display board |
| 11 | Volume and on/off control before removal |
| 12 | The top removed from the (cheap) volume control |
| 13 | Another view of the volume control |
| 14 | After volume and on/off control removal |
| 15 | Display mounting to the front panel |
| 16 | Removing the display from the front panel |
| 17 | Cut on the black line… |
| 18 | After the cut |
| 19 | After the cut (detail) |
| 20 | After the cut (front view) |
| 21 | Display board fitted into a custom control head |
| 22 | Display board fitted into a custom control head (rear view) |
| 23 | Display board fitted into a custom control head (front view) |
| 24 | Control head construction |
| 25 | Relay keying transmitter on switch |
| 26 | Relay wiring detail |
| 27 | Control head construction |
| 28 | Control head construction |
| 29 | Completed control head |
| 30 | Control head interfaced directly to the radio |
| 31 | Wiring the DB-25 into the radio |
| 32 | Wiring the DB-25 into the radio |
| 33 | Wiring the DB-25 into the radio |
| 34 | Wiring the DB-25 into the radio |
| 35 | Pull-up resistor for channel change functionality |
| 36 | Wiring the DB-25 into the radio |
| 37 | Trace cut |
| 38 | Volume control/on-off switch wiring |
| 39 | Rear of the Syntor X9000 control head |
| 40 | X9000 head open |
| 41 | X9000 wire connected |