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 (click to enlarge) | 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 |