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Exhibit 8

 

 1 -

17

1

International, Inc.

Exhibit 8: User’s Manual

External Radio Frequency

Power Amplifier ACOM 1000

Model 1000

157 Horse Pond Road, Sudbury, MA  01776

Tel: 

(978) 440-7555

Fax:  

(978) 440-9080

e-mail:  

[email protected]

Summary of Contents for 1000

Page 1: ...it 8 1 17 1 International Inc Exhibit 8 User s Manual External Radio Frequency Power Amplifier ACOM 1000 Model 1000 157 Horse Pond Road Sudbury MA 01776 Tel 978 440 7555 Fax 978 440 9080 e mail aa1nd aol com ...

Page 2: ...OOTING 15 7 SPECIFICATIONS 15 7 1 PARAMETERS 15 7 2 FUNCTIONS 16 7 3 STORAGE AND SHIPMENT 16 1 GENERAL INFORMATION 1 1 Introduction and Description This manual explains the installation operation and maintenance of the ACOM1000 HF 6 meters linear amplifier The ACOM1000 is a complete and self contained linear amplifier that covers all amateurs bands from 1 8 through 54MHz and provides over 1000W ou...

Page 3: ...econds at a quarter of nominal output power Operates without special signals from the transceiver ground on TX and 60W RF drive power are sufficient Broadband input matching circuit resulting in very good load to the transceiver over the entire spectrum from 1 8MHz up to 54MHz Uses a single 4CX800A GU74B Svetlana high performance ceramic metal tetrode with plate dissipation of 800W forced air cool...

Page 4: ...the amplifier Otherwise you may endanger your or other s health and life or damage the amplifier and the equipment connected with it not covered by warranty The manufacturer is not liable for another s actions and responsibility shall be assumed by the doer C A U T I O N To avoid damage not covered under warranty read the Installation Section 2 of this operating manual carefully If you have any do...

Page 5: ... system may have to withstand currents over 10A with insignificant voltage drop on it Therefore it may be necessary to improve it considerably i e to become less resistive with heavier leads and lower resistive ground path The grounding leads should be at least 4mm2 AWG 11 or SWG 13 Fig 2 1 Connections a First connect the ground stud of the amplifier on the rear panel marked GND to the station s g...

Page 6: ...llow with two green stripes and the blue and brown leads are active When the amplifier is to be used with only one mains fuse it is connected in series with the brown lead which must be the active If you have any doubts about the correct way of connecting the wires consult your dealer W A R N I N G Before connecting the amplifier to your mains supply be sure that the supply is correctly wired and ...

Page 7: ...the upper line of the LCD always reads directly peak forward power even while the tube is not driven The 1200W scale resolution is 10W per bar dots division weight is 60W and figures are multiple to 300W Note also that levels below 20W may be not detected N O T E If the characters on the LCD are dim or not readable please follow the method of LCD contrast and backlighting adjustment described in S...

Page 8: ...After 2 5 minutes you may tune and start operating the amplifier and you can use the ON LINE information screens or control functions see below 4 OPERATION Operation of the amplifier is simplified due to the TRI tuning aid Auto Operate function and automatic protection system so you ll be able to begin using it immediately after the installation However to make full use of amplifier s potential an...

Page 9: ...nd RF gain at nominal output power with minimum IMD at that Please note that the REFLECTED POWER readings and the measured VSWR depend on the load impedance only and not on the amplifier tuning If the load impedance is different from 50 Ohm pure resistive nominal the REFLECTED POWER reading will always indicate reflected power presence even at excellent tuning The proper tuning will allow you to o...

Page 10: ...W drive power while the amplifier is not yet tuned This will automatically invoke the TRI tuning aid and will insert the input attenuator the ATT LED will light after one second The attenuator will be switched off and the old screen will be returned automatically after you release the PTT shortly If you have achieved meanwhile a nearly good tuning the attenuator would not be inserted again If the ...

Page 11: ...and NEXT buttons You may change them in a closed loop while the amplifier is used and controlled in operate and standby modes changes transmit and receive without any influence by the measuring process b You can control LCD adjustment and Auto Operate feature selection also while ON LINE The method is the same as it is described for OFF LINE so see S 5 1 and S 5 2 for details 4 5 Auto Protection S...

Page 12: ...ture information is stored in its nonvolatile memory The 7 most recent auto protection trip signatures related to the amplifier internal status are stored there which you can copy and forward to your dealer for diagnostics In order to read and to copy them press the OPER button while OFF LINE The backlighting of the LCD will light and you ll see the beginning of the signatures list Use NEXT and PR...

Page 13: ...CX800A GU74B high performance ceramic metal tetrode manufactured by Svetlana is employed in the amplifier Replacement is a complex and potentially dangerous operation For this reason we recommend this work be carried out by a trained service technician ...

Page 14: ... Fig 6 1 ACOM1000 Simplified Schematic Diagram The 4CX800A GU74B Svetlana high performance ceramic metal tetrode V1 with plate dissipation of 800W is grid driven The input signal from the RF INPUT jack is passed through a broadband input matching circuit which comprises ...

Page 15: ...e meaning of the first group is as follows a nA the number of the trip b Next three symbols mean the following PN0 tests made during Power On procedure before HV is ON PN2 tests made during Power On procedure after HV is ON and 1 second after step start is closed SB0 tests made in Stand By during the warm up period or while entering Stand By from Operate SB2 tests made during Stand By after the wa...

Page 16: ...id and plate currents Exhaust air temperature T R sequencing Antenna relay contacts including RF power induced in antenna from another nearby transmitter Antenna matching quality Reflected power RF arcs including in antenna system Overdrive d Signatures of the amplifier internal status are stored in a nonvolatile memory for the seven most recent auto protection trips e Dot matrix backlighted alpha...

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