40
• output circuit matching capability: better than VSWR 3:1 (2:1 for 160m) or greater at reduced
output levels; automated.
g) Automatic Tuning:
• Load Impedance Matching - less than 3 seconds;
• Band Change - less than one second;
• Segment Change - less than 0.2 seconds.
h) RF Gain: 14.5dB, frequency response less than 0.5dB (50 to 60W drive power for rated output).
i) ALC: grid-current derived, -11V max, rear panel adjustable.
j) Primary Power: 90-132V (100 & 120V nominal taps, 10% tol.) and 180-264V (200, 220 &
240V nominal taps, 10% tol.), 50-60Hz, single phase, 3500VA consumption at rated output. In
USA, 240v is strongly recommended.
k) Complies CE safety and electromagnetic compatibility requirements, as well as FCC-
regulations
l) Size & Weight (operating): W440mm x D500mm x H180mm, 36kg.
m) Operating environments:
• temperature range: 0...+50 degs.Celsius;
• humidity: up to 95% @ +35 degs.Celsius.
• altitude: up to 3000m above sea level without output deterioration.
9-2. Functions
a) Load Impedance Matching Process: automated.
b) Provides Antenna Control Interface for Automatic Antenna Selector and Tuner.
c) User tuning settings memory - nonvolatile for up to 10 antennas per frequency segment
(settings for 50 Ohm default provided).
d) Tubes: two 4CX800A (GU74B / ГУ74Б) Svetlana (Светлана) high performance ceramic-metal
tetrodes with plate dissipation of 800W each, grid driven, forced air cooling.
e) T/R System: QSK operation with built-in vacuum RF antenna relay.
f) Protections:
• cover interlock for operator's safety;
• inrush power-on current control;
• all supply voltages;
• control grid, screen grid, plate and heater currents;
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