Palstar COMMANDER VHF-144, Owner'S Manual

Page 1: ...2 METER LINEAR AMPLIFIER Owner s Manual PALSTAR INC Command Technologies Division 9676 N Looney Road Piqua Ohio 45356 U S A Customer Service and Sales Telephone 800 773 7931 Fax 937 773 8003 E mail i...

Page 2: ...Procedure 9 Operating Hints 10 Typical Operating Conditions Table 10 Warranty Service and Returns 11 HV Power Supply Schematic 12 AC Mains Step Start Schematic 13 Control Metering Board Schematic 14 R...

Page 3: ...band An automatic delay circuit for proper cathode conditioning before RF drive is applied which extends tube life This is preformed by a microprocessor which also controls a step start dual relay sy...

Page 4: ...lower Load Tuning Capacitor Input Tuning Piston Capacitor 3CPX800A7 Triode Tube Filament Transformer High Voltage Interlock Switch Duel Meter Control Board w Mutliple LED Backlighting High Voltage Boa...

Page 5: ...adjustable Output Impedance 50 Ohms nominal Antenna Load VSWR 2 1 maximum Harmonic Suppression better than 60db down at rated output Intermodulation Distortion better than 35 dB down at rated output W...

Page 6: ...internal RF tube compartment covers removed CONTACT WITH VOLTAGES IN THE CABINET CAN BE FATAL CLOSE QUAR TER EXPOSURE TO UNSHIELDED RF AT THESE POWER LEVELS AND FRE QUENCY IS HAZARDOUS TO YOUR HEALTH...

Page 7: ...ol Multi turn Piston Capacitor Preset at Factory Multimeter Relative Output Grid Current LOAD Control INPUT Control STANDBY OPERATE Switch ON OFF Switch Power Ready Light RF In RF Out Bypass SWR Adjus...

Page 8: ...e of the unit and between other equipment To switch from transmit to receive the Commander VHF 144 requires a contact closure or keying circuit capable of sinking 15ma of positive voltage 12 VDC open...

Page 9: ...tion Switch the OPERATE STANDBY switch to the OPERATE position and key the exciter with ZERO RF drive applied The Red Transmit light should illuminate the tube will be biased on and plate idling curre...

Page 10: ...someone changes these ad justments it will not be necessary to retune the amplifier each time you operate it Just turn the unit on wait for the green light and begin transmitting If you decide later t...

Page 11: ...ability other than herein stated Shipping Your Amplifier Back to the Factory Due to the necessity of shipping the amplifier with the HV transformer removed please contact the factory for instructions...

Page 12: ...12 Commander VHF 144 HV Power Supply...

Page 13: ...13 AC Mains and Step Start Board VHF 144 13 5VAC...

Page 14: ...14 Control and Metering Board VHF 144...

Page 15: ...15 RF Deck VHF 144...

Page 16: ...16 Commander VHF 144 T R Relay Board...

Page 17: ...17 Commander VHF 144 Voltage Doubler Power Supply Board...

Page 18: ...18 RF Deck 3CPX800A7 Triode Tube Load Tuning Capacitor Input Tuning Piston Capacitor RF Plate Choke Plate Capacitor 120pf 7 7kv...

Page 19: ...19 Dual Meters Grid Current Scale 0 60ma Single Tube Top 0 120ma Two Tubes Mid 0 180ma Three Tubes Bottom Grid Current Scale 0 600ma Single Tube Top 0 1200ma Two Tubes Mid 0 1800ma Three Tubes Bottom...

Page 20: ...20 Meter Board Cathode Fuse...

Page 21: ...21 Step Start Board AC Main Fuse 20A x 2 AC Interlock Step Start Relays x 4...

Page 22: ...22 Power Supply 470uF Capacitor 450 vdc x 8 HV Sense RF Output...

Page 23: ...23...

Page 24: ...24 Palstar Incorporated 9676 N Looney Rd Piqua OH 45356 USA Customer Service and Sales Telephone 1 800 773 7931 Fax 1 937 773 8003 Email info palstar com Version 1 0 2010 03 29...