Palstar Commander VHF-1200, Руководство пользователя

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INTRODUCTION
The Commander VHF-1200 and VHF-2000 are Grounded Grid class AB
2
linear power
amplifiers that operate on the Amateur 6 Meter band.
Over-drive and over-grid current protection is provided by an auto-reset circuit that places
the amplifier in standby if a preset grid current limit is exceeded.
Genuine CPI/Eimac 3CPX800A7 external anode triodes, with forced air cooling and
modern circuitry, insure efficient and conservative operation. The VHF-1200 uses one
tube, the VHF-2000 uses two.
6:1 Vernier reduction drives on all tuning controls allow smooth and easy tune-up.
A rear panel input tuning control allows a higher input circuit
Q
for excellent linearity
and a low input VSWR across the 6 Meter band.
An automatic delay circuit, for proper cathode conditioning before RF drive can be ap-
plied, extends tube life. A 50 ohm resistor in the plate supply positive lead and a 200 ohm
resistor in the negative lead protect the tube in the event of an arc.
The Commander VHF-1200 and VHF-2000 feature a full compliment of control and me-
tering functions for easy on-the-air operation.
A dual primary power transformer allows 200/234 VAC operation.