QRO Technologies HF-2000 Instruction Manual
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11approximately 100 watts of RF output. You can use a transceiver that has lower output power, butthe Amplifier's output will be less. If you use a transceiver that delivers more than 100 watts,carefully adjust the driving power to avoid "overdrive" and the creation of spurious signals, whichcreate needless interference to other operators. IMPORTANT: In no case should you advancethe power output control of your transceiver beyond the point where the Amplifier's power outputindication ceases to increase. If you turn the control past this point , nonlinear operation mayoccur.TUBEIt is not abnormal for the tube to show a dull red color. But if the plate shows a bright orange oryellow color, immediately investigate the tuning and drive conditions and make any necessarycorrections. After prolonged operation, let the Amplifier run for several minutes without driveapplied so the fan will cool the tubes before you turn the Amplifier off.READING THE METERSRefer to Front Panel Pictorial while you read the following information:Multimeter: The Multimeter switch on the front panel of the Amplifier selects the right-handmeter functions. Read the meter scale which corresponds to the setting of the Multimeterswitch as shown in Table A.Grid Meter: The left-hand meter always indicates grid current between 0 and 300milliamperes. Each Division indicates 10 milliamperes.Table AMultimeter SwitchPositionMeasures Scale IndicationPlate Voltage (PV) Plate Voltage Center scale indicates 0 to 3500 volts(normal operating range is 2700 to 3200volts) Each division represents 100 volts.Plate Current (IP) Plate Current Top meter scale indicates 0 to 1400milliamperes. Each division represents 40milliamperes.Power Output (PO) PEP RF Power Bottom meter scale indicates 0 to 2000(PEP) voice peak only watts. Does notmeasure average or RMS powerALC ALC Detector Indicates relative ALC OutputTUNE-UP PROCEDURE |
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