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Amplifier enters BYPASS due to high SWR during transmission.
Protects transistors if drain current (Id) exceeds 45.9A.
Heatsink temperature exceeds 99°C, amplifier stays in standby.
Detects drive levels exceeding 70W, bypassed to protect transistors.
Message appears when PTT is low but no RF is present.
Check PTT cable connection and transceiver PTT keying settings.
Amplifier in BYPASS due to SWR over 2.5:1 during transmission.
Disable transceiver autotuner when driving any amplifier.
Heatsink temperature exceeds 70°C or 100°C, amplifier goes into BYPASS.
Occurs when drive level exceeds approximately 60W.
Protects from loss of +50V, drain voltage supply when Id exceeds 32A.
Key warnings to prevent damage: input power, tuning pulser, air vents.
General| Tuning Method | Manual |
|---|---|
| Impedance | 50 Ohms |
| Input Impedance | 50 Ohms |
| Output Impedance | 50 Ohms |
| Cooling | Forced Air |
| ALC | Yes |
| Power Output | 1000 Watts |
| Power Input | 100 W |
| Tube Type | 4CX800A |
| Metering | Plate current, grid current, forward and reflected power |
| Power Requirements | 50/60 Hz |
