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HF LINEAR AMPLIFIER

ACOM OOD

Bul. Nikola Mushanov 151

1330 Sofia, Bulgaria

phone: +359 2 920 96 55

fax: +359 2 920 96 56

e-mail: [email protected]

www.acom-bg.com

September 2011

Printed in Bulgaria

Содержание 1011

Страница 1: ...HF LINEAR AMPLIFIER ACOM OOD Bul Nikola Mushanov 151 1330 Sofia Bulgaria phone 359 2 920 96 55 fax 359 2 920 96 56 e mail acom mail orbitel bg www acom bg com September 2011 Printed in Bulgaria ...

Страница 2: ...Amplifier Location Selection 6 2 4 Connections 6 3 POWER ON CONTROLS AND INDICATORS 8 4 OPERATION 10 4 1 Turning ON and OFF 10 4 2 Changing Operate and Standby Modes 10 4 3 RTTY Mode 11 4 4 Antenna change 11 4 5 Tuning 11 4 6 The Auto Protection System 13 5 MAINTENANCE 14 5 1 Cleaning 14 5 2 Fuses Replacement 14 5 3 Tubes Replacement 15 5 4 Simplified Schematic Diagram 15 5 5 Service Functions 16 ...

Страница 3: ...2 We express our thanks to Jim Talens N3JT for his editorship and Ron Stone GW3YDX for his comments and suggestions ...

Страница 4: ...20 9656 telephone 359 2 920 9655 e mail acom mail orbitel bg standard mail ACOM Bul N Mushanov 151 1330 Sofia Bulgaria 1 3 Equipment Supplied The ACOM1011 amplifier and this manual are shipped in a cardboard carton 1 4 Features Easy operation The plate load True Resistance Indicator TRI is an ACOM innovation that provides quick and precise tuning typically in less than 10 seconds The auto operate ...

Страница 5: ...onfigured to accommodate any of 8 nominal line voltages between 100 and 240 V 50 or 60 Hz Band inclusion The amplifier can be shipped with 10 and 12 meter capability disabled as required by the Federal Communications Commission FCC for United States users Contact your dealer about enabling those bands 1 5 Safety Considerations Explicit Definitions The ACOM1011 HF Linear Amplifier is a Safety Class...

Страница 6: ... your amplifier yourself including any attempt to change hardware or firmware Doing so creates a potentially fatal shock hazard and may damage the amplifier or equipment connected to it ACOM is not responsible for any such personal injury or equipment damage whether caused by accident or as a result of good faith efforts at repair or adjustment CAUTION To avoid damage to the amplifier not covered ...

Страница 7: ...nel cabling will be necessary No device that is sensitive to magnetic fields including dynamic microphones should be located adjacent to the right side of the amplifier where the power transformer is mounted The amplifier should generally be placed to the right of your transceiver No temperature sensitive devices should be located above the air exhaust ports This means the amplifier should not be ...

Страница 8: ...t a minimum RG8X including RG8MINI RK50 4 11 RK50 4 13 or even better RG213 including RK50 7 11 coaxial cable be used c Connect a suitable coaxial cable from the antenna to the appropriate amplifier output on the rear panel marked ANT1 or ANT2 using a PL 259 plug d Run a shielded cable from the ground on transmit socket or terminal on your transceiver to the amplifier rear panel KEY IN socket The ...

Страница 9: ...roperly connected The Power Switch on the front panel must be in the OFF position only then should you insert the amplifier s line mains plug into the appropriate wall outlet At this time the amplifier remains switched off 3 POWER ON CONTROLS AND INDICATORS CAUTION Do not turn the amplifier on for at least 2 hours after unpacking it and locating in its operating location Pay particular attention w...

Страница 10: ...of the amplifier The red TX LED illuminates whenever the KEY IN input is keyed closed to ground i e when the transceiver goes into the transmit mode See Section 2 4 d The BAND knob controls the band switch and LOAD and TUNE are used to adjust their respective variable air capacitors in the amplifier s output circuit The settings of these three controls must be changed at each band change as well a...

Страница 11: ...used Also during this period the A1 A2 button may be pressed to change antennas i e between the antennas connected to the ANT1 and ANT2 terminals on the rear panel of the amplifier Switching between the antennas does not affect the warm up process CAUTION To avoid damage not covered under warranty do not change the antenna output during a transmission i e never press the A1 A2 button when transmit...

Страница 12: ...ier tuning If the load impedance is not a nominally resistive 50 Ohms the REFLECTED POWER reading will always show a reading no matter what the tuning settings Proper tuning is always necessary however and will allow you to operate at a high power level without distortion or any danger to the amplifier Note also that the real OUTPUT POWER presented to the load the antenna and transmission line is ...

Страница 13: ...mplifier s band switch CAUTION Also never apply drive longer than one minute continuously without pausing for at least one minute to allow the tube to cool It is recommended that for initial tuning a frequency in the middle of the band be used First with no transceiver power applied select the band Then use Table 4 1 to achieve an approximate preset for both TUNE and LOAD capacitor knob settings B...

Страница 14: ...knob is turned to the left with a centered TRI there will be more gain but less linearity When available drive power is insufficient or when less output but better efficiency are needed e g for RTTY and SSTV this may be desirable Tuning to the right of the center would lead to the opposite result i e less gain and more power attainable Of course this requires more drive power more plate current an...

Страница 15: ...aph area are flashing simultaneously you must immediately switch off the amplifier to avoid damage 5 MAINTENANCE If no indicator glows upon switching the amplifier on the main fuse s may have blown See Section 5 2 5 1 Cleaning WARNING Do not use solvents for cleaning as they may be dangerous to you and damage amplifier surfaces and plastic components Do not open the amplifier Cleaning the amplifie...

Страница 16: ...metal tetrodes V1 and V2 with a total plate dissipation of 500W forced air cooling are grid driven The input signal from the RF INPUT jack is passed through a broadband input matching circuit which consists of components on the INPUT PCB and includes the drive power swamping resistor Rsw This circuit tunes out the input capacitance of the tubes The swamping resistor Rsw is a termination load for t...

Страница 17: ...This provides an approximate reading of grid 2 voltage The upper bar graph should show a voltage reading within the range of either 270 330 Volts 9 11 LEDs illuminated for RTTY or 210 360 Volts 7 to 12 LEDs illuminated for SSB and CW c Pressing the OPER and RTTY buttons yet again will illuminate the yellow IP light This provides an approximate reading of combined plate current and grid 2 current T...

Страница 18: ...Humidity up to 95 35 degrees Celsius Height up to 3000 m above sea level without output deterioration 6 2 Functions a Antenna Impedance Matching Process aided by a plate load True Resistance Indicator TRI b Two antenna outputs selectable by a button on the front panel c Protections Cover interlock for operator s safety Inrush power on current limited to the nominal consumption Control grids screen...

Страница 19: ...iginal carton a Acceptable storage environment The amplifier may be kept packed in a dry ventilated and unheated location with no chemically active substances such as acids or alkalis within the following environment ranges Temperature range 40 to 70 degrees Celsius Humidity up to 75 35 degrees Celsius b Shipping Size and Weight WxDxH 535x445x270mm 21kg 21x17 5x10 6 inches 46 3Lbs c All types of t...

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