Specifications

8
METERING: The front panel moving LED display systems indicate:
“Moving light” LED indicators:
• output power
• reflected power
• screen grid current (positive / negative)
• plate voltage
• plate current
Five single LED’s:
• on air
• ready
• fault
• overdrive warning
• SWR cut-off indicator
EBS: Electronic Bias Switch - automatically switches the standing current (about 0.5 A) to a lower ("pre-
bias") value - when there is no input drive.
PRE-BIAS: A small current will flow in the tube when the amplifier is keyed on, but there is no modulation.
This will prevent a harsh sound at the beginning of each word, when the EBS is activated and the tube goes
through a non-linear zone, before reaching the correct initial bias.
The nominal Pre-Bias current is 40 mA (30 to 60 mA, not critical).
QSK: makes possible the antenna switching at very fast rate - typically 3ms switching time in each direction.
SOFT START: when switched on, the mains power is gradually applied to the transformer, over a period of
about 5 seconds, to avoid the high in-rush current typical for such high loads.
Typical voltage drop on the triac: 1 V when not transmitting, <2 V at full power.
PTT Switching: Open circuit voltage +6 VDC. Ground to key (6 mA to ground).
COOLING: Two speed forced air cooling.
OPERATING TEMPERATURE: 0 to 40° Celsius
FUSING: Two 40 A normal acting fuses in each mains line on the rear panel.
OPERATING MAINS VOLTAGE: 200 to 240 V, Single Phase (Transformer taps: 200, 220, 230, 240 V).
Optional 400V, power between 2 mains phases.
CURRENT CONSUMPTION: about 35 A
RMS
when transmitting full power at 240 V mains.
DIMENSIONS: 470 mm wide, 250 mm high, 470 mm deep (18.5” x 10” x 18.5”)
WEIGHT: 55 kg (120 lb) unpacked (with the transformer installed)
TRANSFORMER: shipped separately in a wooden box approx. 310 x 250 x 260 mm (12” x 10” x 10.25”),
30 kg (66 lb).