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QRO HF-2000 LINEAR AMPLIFIER
QRO HF-2000 LINEAR AMPLIFIER
COPYRIGHT 1995 BY QRO TECHNOLOGIES, INC. ALL RIGHTS RESERVED.
THIS MANUAL OR ANY PART THERE OF MAY NOT BE REPRODUCED IN ANY FORM WITHOUT
INSTRUCTION MANUAL
QRO TECHNOLOGIES, INC.
QRO TECHNOLOGIES, INC.
1117 West High Street
P.O. Box 939
Bryan, OH 43506 USA
Tel & Fax: (419) 636-2721
E-Mail: sales@qrotec.com
Internet: http://www.qrotec.com
PUBLICATION DATE: JUNE 1995
PERMISSION FROM QRO TECHNOLOGIES, INC.
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Table of Contents
Related Manuals for QRO Technologies HF-2000
Summary of Contents for QRO Technologies HF-2000
- Page 1 Tel & Fax: (419) 636-2721 E-Mail: sales@qrotec.com Internet: http://www.qrotec.com PUBLICATION DATE: JUNE 1995 COPYRIGHT 1995 BY QRO TECHNOLOGIES, INC. ALL RIGHTS RESERVED. THIS MANUAL OR ANY PART THERE OF MAY NOT BE REPRODUCED IN ANY FORM WITHOUT PERMISSION FROM QRO TECHNOLOGIES, INC.
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Page 2: Specifications
SPECIFICATIONS Band Coverage: 160, 80, 40, 20, 17, and 15 (12 & 10 export only) meter amateur bands. 12 & 10 meter also useable in USA with proof of license and user modification. Drive Power Required: 120 Watts Typical Maximum Output Power: 1,500 Watts SSB, 1250 Watts CW, 800 Watts RTTY, FM, SSTV Duty Cycle:... -
Page 3: Table Of Contents
TABLE OF CONTENTS Warranty Proprietary Notice Safety Notification Unpacking & Inspection Transformer & Tube Installation 6, 7 Line Voltage Selection Power Block Wiring Reshipment Instructions 7, 8 Introduction Location AC Power Line Considerations Antenna Grounding Equipment Interconnections Safety Interlock Switch Driving Power Tube Reading the Meters... -
Page 4: Warranty
WARRANTY _____________________________________ The HF-2000 is warranted against defects in material and workmanship for a period of two years for the original date of sale. This warranty does not cover the 3-500 triode which carries a separate warranty issued buy its manufacturer. Please check the warranty card which comes with the tube. - Page 5 ALWAYS THINK SAFETY __________________________________________________ THIS LINEAR AMPLIFIER DESCRIBED IN THIS MANUAL CONTAINS VOLTAGE HAZARDOUS TO HUMAN LIFE AND SAFETY WHICH IS CAPABLE OF INFLICTING PERSONAL INJURY. NEVER OPERATE THE AMPLIFIER WITH THE TOP COVER REMOVED AND THE TOP COVER SAFETY SWITCH DEFEATED. BEFORE REMOVING THE TOP COVER MAKE SURE THE AC LINE POWER CORD HAS BEEN DISCONNECTED FROM THE AC POWER SOURCE.
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Page 6: Unpacking & Inspection
Unpack and remove each component carefully from its carton, preserving the factory packaging as much as possible. Inspect each component for any noticeable defect or damage. Notify QRO Technologies if any defect or damage is apparent. TRANSFORMER AND TUBE INSTALLATION Before performing any of the following installation procedures, make sure that the amplifier has not been plugged into the AC supply line. -
Page 7: Line Voltage Selection Power Block Wiring
Always insure the package for the full replacement value and ship via UPS ground service. QRO Technologies, Inc. will not be responsible for any damage or loss... -
Page 8: Introduction
It is designed to operate at 1,500 watts PEP output on SSB, 1250 watts on CW, and 1000 watts on such high duty cycle emissions as RTTY, SSTV, and FM. The HF-2000 is designed to be used with any transceiver which will deliver 120 watts or more output. It can be used with less driving power, but it will have a lower output. -
Page 9: Antenna
Neutral White Blue Ground (Earth) Green Green/Yellow Use the following NEMA plug configurations according to the corresponding AC line voltage: 100/110 VAC 20 Ampere 5-15P 200/240 VAC 10 Ampere 6-15P or 6-20P Due to the power involved, this Amplifier should have its own 240 VAC electric service line. This line should have three 12-gauge conductors, and 10 ampere fuses in each "hot"... -
Page 10: Equipment Interconnections
as described above. EQUIPMENT INTERCONNECTIONS Interconnection between the Amplifier and a typical transceiver is shown in the "Interconnection Diagram" located inside your tranceiver owners manual. Many brands of equipment usually follow the same general pattern. Please refer to this diagram plus the amplifier's Rear Panel Pictorial while reading the following: RF IN Connect this socket to the RF output connector of your transceiver. -
Page 11: Tube
approximately 100 watts of RF output. You can use a transceiver that has lower output power, but the 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, which create needless interference to other operators. - Page 12 Please refer to the Front Panel Pictorial while reading the following.The current and voltage figures given in this section are approximate. Actual indications will vary at each installation with such factors as line voltage, transceiver drive, and load impedance. The following procedure for tuning the Amplifier should only take a few seconds after you go through it a few times.
- Page 13 approximately 2900 - 3200 volts. 4. Make sure your transceiver has been turned on and its drive level control has been set to minimum. 5. Turn the Band Switch to the same band as you have selected on the transceiver. Then preset the Tune Control and the Load Control to the positions indicated in the above chart for the band you have selected.
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Page 14: Tuned Input Adjustments
1. Tune up the Amplifier as described for CW operation. 2. Advance the transceiver drive and audio levels so that the modulation crest does not exceed 400 ma of plate current, 100 ma of grid current, or 1,500 watts of PEP output. USING THE FRONT PANEL ALC CONTROL TO ADJUST AMPLIFIER OUTPUT POWER. -
Page 15: Periodic Maintenance
PERIODIC MAINTENANCE Make sure the Amplifier has been disconnected for the AC power source and the high voltage filter capacitors have bleed down to zero. Remove the top cover from the Amplifier at least once a year and remove the dust. Dust accumulation can help cause the variable capacitors to arc between plates. - Page 16 Multimeter inoperative in Power Output 1. Components on ALC/Power PCB-610 Function a. Capacitors C601 -C603, C604, C608, C609 b. Diodes D601, D602 c. Resistors R601, R605, R606 d. POT R605 e. Transistor Q601 2. Switch SW401A&B Meter Switch PCB-510 3. M-2 Multimeter 4.
- Page 17 No Plate Idling current cut-off when amplifier is 1. Components on LV & Bias PCB-260 not keyed or is in standby mode a. Transistor Q302 b. Diodes D303 - D310, D311 c. Resistor R301 &R304 d. Transient Voltage Suppressor TSD301 e.
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Page 18: Circuit Descriptions
No RF Output 1. Improper connections between transceiver, amplifier, and antenna 2. Transceiver and amplifier are set to different bands 3. Improper Tuned Input adjustment 4. Defective RF I/O Switching PCB-350 5. Defective RF Output T/R Relay RY1 6. Defective Band Switch SW3A, SW3B 7. -
Page 19: Plate Voltage
provides a step-start when the amplifier is switched on. Components C12, R10, D10 provide the time delay to minimize the inrush current. Resistors R11 & R12 limit the inrush current while the delay circuit cycles. After a 1 to 2 second delay the contacts on relay K-1 close allowing the full current to be applied to the primary of T-1.Terminal Block TB1 allows for the selection of the line voltage to be used. - Page 20 The 12 VAC secondary winding of T1 supplies the voltage for the +12 VDC supply circuit located on the LV & Bias PCB-260. 110 VAC ISOLATION SUPPLY The 110 VAC secondary winding of T1 provides an isolated supply voltage for the +110 VDC power supply located on the LV &...
- Page 21 ALC CIRCUIT ALC Adjust Control (R13) located on the front panel allows you to set the ALC threshold to match your Transceiver.Please refer to the Schematic and PCB drawing for the ALC/Power PCB-610. Capacitors C606 & C607 form a voltage divider that couples some of the RF driving voltage to Diodes D603 &...
- Page 22 ALC MULTIMETER CIRCUIT When you select this function, a portion of the negative ALC voltage developed in the ALC/Power PCB-610, described earlier, passes through resistors R603 and R312 (LV & Bias PCB-260) to multiplier meter M-2. RF I/O SWITCHING PCB AND BIAS RELAY SWITCHING CIRCUITS All RF T/R relays (RY1 &...