Manual | Buy One Now | Checkout Commander VHF-2000 1500 Watt 6 Meter RF Amplifier Price: $3995.00 In Stock-Available For Immediate Shipment! When Palstar bought the Command Technologies high power amplifier line, we knew that we were taking over a proud tradition of quality and performance. But, as good as they were, they represented the state of the art of an earlier time. Palstar's engineers immediately undertook a modernization and improvement program. Palstar's Command Technologies amplifiers now incorporate a microprocessor-based controller to provide more precise T/R and electronic bias sequencing. The amplifiers now feature true step-start, limiting in-rush current to the HV power supply and also to the tube filaments. This translates into greater reliability and tube life, since the HV rectifier, filter stack, tube filaments, and even the fuses, are not stressed on startup. The new keying interface is now opto-isolated and fully compatible with solid-state transceivers, requiring the transceiver's keying circuit to only sink 20mA @ 5VDC. The controller, HV power supply, and tuned input circuit boards are now fully silk-screened and solder-masked, with plug-in connections enabling them to be easily removed for repair or trade out. New dual-scale cross-neddle metering provides continuous readouts of grid current, plate voltage and current, and relative power output without the need to switch between functions. A 6 Meter High-Power Classic Need more power on 6 Meters than the Commander VHF-1200 can provide? Then the Commander VHF-2000 is the answer. Using two genuine Eimac 3CPX800A7 pulse-rated external anode triodes, this 1500 Watt PEP SSB, 1200 Watt FM or RTTY workhorse provides the famous reliability of previous Commanders and uses the same beefy power supply as the HF-2500. The Commander VHF-2000 is a Grounded Grid class AB2 linear power amplifier that operates 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. 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 applied 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. A dual primary power transformer allows 200/234 VAC operation. One Year Palstar Factory Warranty: Palstar stands behind the VHF-2000 with a one (1) year limited warranty. Click here for eHam.net independent product reviews of the Commander VHF-2000. Order online: Order by phone:   1-800-773-7931 (USA Toll-Free)                              1-937-773-6255     (International) Order by fax/mail: Click here for order form Specifications Frequency Range: 50 to 54 mHz. High speed electronic bias switching. True step-start control circuitry. Opto-isolated keying interface. Modes: USB, LSB, RTTY, FM, & CW Power Requirements: 200/234VAC 50/60 Hz. RF Drive Power: 15-25 W Nominal; 35-40 Watts Max. For Full Output RF Output: 1500 Watts PEP SSB; 1500 Watts FM or RTTY Input Impedance: 50 Ohm unbalanced; rear panel adjustable Output Impedance: 50 Ohms nominal. Antenna Load (VSWR): 2:1 maximum. Harmonic Suppression: better than 60dB down at rated output. Weight (with transformer): 75 lbs (34 kg) Cabinet Size: 18" x 16" x 7.75" (45.7 cm x 40.6 cm x 19.7 cm) Tube Compliment: two 3CPX800A7 pulse-rated ceramic metal triodes. Cooling: pressurized chassis forced air. VHF-2000 Front View | VHF-2000 Rear View | VHF-2000 Inside View Manuals: VHF-1200/VHF-2000 Manual (Click here to download PDF)