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User's Manual | ACOM 700S | 1.8-54 MHz Linear Amplifier  

Page  10 of 52  |  S e c t i o n   GENERAL INFORMATION 

May 2021 

 

1.5.

 

Safety Considerations, Explicit Definitions 

 
The ACOM 700S linear amplifier is a Safety Class I unit regarding protection against electric shock. The third 
grounding lead of its mains cord (which is colored yellow with two green stripes) and the ground stud on 
the rear panel of the amplifier (marked GND, see 

Figure 2-1 Rear panel - Connections

) must be connected to 

the station's grounding system for safe operation. 
 
The  amplifier  is  designed  to  meet  international  safety  standards  and  complies  with  CE  safety  and 
electromagnetic compatibility requirements, as well as FCC regulations. 
 
This User's Manual contains information, warnings (signal words Danger, Warning, Caution and Notice)  and 
instructions, related to hazards, that should be followed by the user in order to ensure safe operation and 
to keep the amplifier in a safe working condition at all times. 

 
 

The EXPLICIT DEFINITIONS described below apply to this User's Manual: 

 

 

DANGER 

These  notes  call  attention  to  a  procedure  or  instructions  which,  if  not  correctly 
performed, 

will result in serious personal injuries and even death

.

  

 
 

 

WARNING 

These  notes  call  attention  to  a  procedure  or  instructions  which,  if  not  correctly 
performed, 

could result in serious personal injuries and even death

. 

 
 

 

CAUTION 

These  notes  call  attention  to  a  procedure  or  instructions  which,  if  not  correctly 
performed, 

could result in minor or moderate personal injuries

. 

 
 

NOTICE 

These  notes  call  attention  to  a  procedure  or  instructions  which,  if  not  correctly 
performed, 

could  result  in  property damage

 

or  equipment  damage not  exclusively  to 

the amplifier but also to connected equipment

.

 

 

 

Summary of Contents for 700S

Page 1: ...ACOM 700S 1 8 54 MHz Linear Amplifier User s Manual Installation Operation and Maintenance May 2021 OUTSTANDING HF POWER PRODUCTS ...

Page 2: ...er Page 2 of 52 S e c t i o n ABOUT DOCUMENTATION May 2021 This manual is for electronic distribution mainly If you have it on paper and you no longer need it please recycle it The latest versions of our User s Manuals are available at www acom bg com ...

Page 3: ...ns which thereby become invalid The cover images used in the manual are illustrative only We are continuously striving to improve our documentation but nobody is perfect And our documentation is not an exception of this rule Have you found any errors or would you like to suggest changes in our documentation Please help us by sending your suggestions to the following e mail address documentation ac...

Page 4: ...ition R01 Validity The specified data is for product description purposes only and may not be deemed to be guaranteed unless expressly confirmed in the contract All rights are reserved with respect to the content of this manual and the availability of the product Copyrights 2021 ACOM Ltd Copying this document giving it to others and the use or communication of the contents thereof without express ...

Page 5: ...TROL SYSTEM AND INITIAL CHECK 20 3 1 Low Energy Standby Mode of the Power Supply 20 3 2 Front Panel 20 3 3 Initial Turning On 21 3 4 Basic Screen 21 3 5 Control System Buttons and Menus 23 3 6 Test transmission 23 4 OPERATION 27 4 1 Change of Modes RX TX and Operate Stand by AUTO OPERATE user setting 27 4 2 Band Change Standard and Expanded Frequency Coverage 28 4 3 Operation with an External Ante...

Page 6: ...48 8 3 1 Storage Environment 48 8 3 2 Shipping Size and Weight 48 8 3 3 Transportation 48 8 3 4 Returning to the Service Provider 48 8 4 Information on Disposing and Recycling of Old Electrical and Electronic Equipment 49 NOTES 50 Figures Figure 2 1 Rear panel Connections 15 Figure 3 1 Front panel Controls and Readouts 21 Figure 3 2 Basic screen 22 Figure 4 1 ACOM 04AT Remote Automatic Antenna Tun...

Page 7: ...7 of 52 Figure 5 7 Menu RESTORE DEFAULT SETTINGS 39 Figure 6 1 ACOM eBox Ethernet Remote Control device 40 Figure 8 1 Packaging cardboard box 48 Tables Table 2 1 Signals and pin out of the CAT AUX connector 18 Table 2 2 Signals and pin out of the RS 232 connector 19 Table 5 1 Transceiver interface 36 ...

Page 8: ...4AT Remote Automatic Antenna Tuner and Switch is designed to work with our transistor solid state amplifier series including the ACOM 700S see Section 4 3 Operation with an External Antenna Tuner Remote control of ACOM 700S is provided by ACOM eBox Ethernet Remote control device or RS 232 port see Section 6 REMOTE CONTROL 1 2 Owner Assistance If assistance is needed you should contact your local d...

Page 9: ...put signal frequency through the built in frequency counter and automatically switches bands Remotely controlled by RS 232 port and via Internet by the ACOM eBox Ethernet Remote Control device Takes care of itself via continuously working protection circuits in all modes The operator can monitor numerically more than 10 parameters of the amplifier in operation Easy maintenance detailed data 55 par...

Page 10: ...Danger Warning Caution and Notice and instructions related to hazards that should be followed by the user in order to ensure safe operation and to keep the amplifier in a safe working condition at all times The EXPLICIT DEFINITIONS described below apply to this User s Manual DANGER These notes call attention to a procedure or instructions which if not correctly performed will result in serious per...

Page 11: ...hat may improve equipment reliability and or personnel performance or to emphasize a concept ORANGE TEXT as LINKS marks all internal links in the document between Sections Figures Tables etc for your convenience The safety instructions contained in this User s Manual feature specific signal words Danger Warning Caution or Notice and where required a safety alert symbol in accordance with actual st...

Page 12: ...NEVER EXPOSE the amplifier to rain snow or any liquids AVOID placing the amplifier in excessively dusty environments or in direct sunlight DO NOT OBSTRUCT COOLING ducts or vents Keep a minimum clearance distance of 10 cm 4 inches to any other devices or objects WARNING Do not undertake on your own repairs or changes in hardware or software of the amplifier in order not to endanger your or other s ...

Page 13: ... weight of the unit is about 13 kg which should preferably be handled by two persons Position the amplifier near the place where it will be used You will need an easy access to the command knobs and indicator s area as well as to the rear panel cabling NOTICE The ACOM 700S is forced air cooled Keep a minimum clearance distance of 10 cm 4 inches to any other devices or objects The exhaust air can r...

Page 14: ... grounding This can cause an EXPLOSION DANGER Do not use the steam heating or water supply network pipes for grounding You may expose to dangerous voltage not only yourself but also other people using the same installation WARNING Note that the grounding system may have to withstand currents over 15 A with insignificant voltage drop on it Therefore it may be necessary to improve it considerably i ...

Page 15: ...o the amplifier rear panel KEY IN socket The KEY IN socket uses a standard RCA phono plug Voltage on the KEY IN jack does not exceed 12 V and the current is below 6 mA see Section 8 2 a Receive transmit control Your amplifier will not work if KEY IN input is not connected properly Transceiver producers give different names to this output and they are for instance TX GND SEND T R LINE PTT etc Some ...

Page 16: ...rmally with KEY OUT unconnected if your transceiver has no such input Transceiver producers give different names to this input and they are for instance TX INHIBIT MUTE LINEAR etc Check your transceiver s manual d RF INPUT Connect a suitable coaxial cable from the transceiver output to the amplifier RF INPUT SO 239 socket on the rear panel using PL 259 plug NOTICE In order to avoid a damage turn o...

Page 17: ... the mains voltage WARNING Before connecting the amplifier to your mains supply using a licensed electrician check that the supply is correctly wired and is adequate for the current drawn by the amplifier up to 10 A from 200 240 VAC mains and up to 16 A from 100 120 VAC mains Make certain that the grounding lead is connected properly and that it has a cross section not less than the cross section ...

Page 18: ...nnection requires a cable made especially for the ACOM 700S and your transceiver If you need cable wiring diagrams Please contact your dealer see Section 1 2 Owner Assistance Note that some of the connections to the transceiver s BCD band data outputs and Band Voltage outputs do not provide an exact frequency data but only band data Those connections cannot be used when ACOM 700S works together wi...

Page 19: ...Please see Section 6 1 Remote Control via ACOM eBox RS 232 interface Pin Nr Pin name Description Specification D sub connector 9 pin female Rear panel view 1 Not connected 2 TxD Transmit Data RS 232 level output 3 RxD Receive Data RS 232 level input 4 Not connected 5 GND Ground 0 Volt 6 DSR Remote Power On RS 232 level input 7 Not connected 8 CTS Remote Power On RS 232 level input 9 Not connected ...

Page 20: ...Mode of the Power Supply Now you can turn on the mains switch marked ON OFF on the rear panel This will activate only the low energy stand by mode of the amplifier power supply and the red LED above POWER button will light up see Figure 3 1 Front panel Controls and Readouts b while the main power supply is still off and the display is dark 3 2 Front Panel Please see Figure 3 1 Front panel Controls...

Page 21: ...on 4 1 c AUTO OPERATE user setting 3 4 Basic Screen Please see Figure 3 2 Basic screen There are 9 different information areas on the basic screen a Information area for the frequency band The edges of the currently selected BAND are displayed If the amplifier doesn t receive any operating frequency data from CAT or via RS 232 it will switch to the last used band b Operating values and alarm messa...

Page 22: ...ng or until the operator pushes any button then the operating values regime measurands indication is restored too c Working mode indicator OPR STB or AUTO OPER See Section 4 1 Change of Modes RX TX and Operate Stand by AUTO OPERATE user setting d RX TX indicator RX TX indicator reads the request for transmit KEY IN input The RX indication is green and the TX is red The indicator will flash frequen...

Page 23: ...alled the amplifier correctly make a test transmission as described below Repeat these tests for each new band and antenna as well as after installing a new or modified antenna antenna switch tuner and or connecting cables a Check of RF bypass path of a non driven amplifier For this check the amplifier must be completely installed and connected according to Section 2 INSTALLATION but not powered b...

Page 24: ... 1 Low Energy Standby Mode of the Power Supply 3 2 Front Panel 3 3 Initial Turning On and 3 4 Basic Screen see Figure 3 2 Basic screen Make sure that the amplifier is in Stand by mode Push the OPR STB button if needed to change to STB Repeat receive and transmit tests the same way you just did with the amplifier turned off During these tests note also whether the forward and reflected power bar gr...

Page 25: ...nu AMP MEASURE and check Тhe drive power from the transceiver must be between 22 W and 29 W PA BIAS which must be between 2 4 and 2 8 V PA TEMPERATURE which must be between the ambient and 95 o C 203 o F depending on the power level and the duration of transmission f Elimination of electromagnetic compatibility EMC problems If you use an amplifier for the first time in your shack you may need to m...

Page 26: ...th the possibly shortest and widest connections to the grounding system this is a very efficient measure in particular if the shack is located on a high floor above ground To reduce the RF impedance of the grounding connections sheet metal stripes instead of flexible braids are preferred Thread ferrite beads or snap in ferrites with medium permeability 800 4000 over the power cord the feeder and t...

Page 27: ... mode the RF drive is amplified and fed to the antenna through the RF OUTPUT connector In order to provide time for the relays to switch safely from receive to transmit the transceiver should provide a dead time i e must notify the amplifier in due time by grounding the control KEY IN input not later than 10 ms before feeding drive power toward the amplifier RF input Otherwise the protection syste...

Page 28: ...e OPR STB button or by a remote command The next OPR STB button push or remote command will switch the amplifier to the Operate mode and restore the normal operation of the AUTO OPERATE user setting 4 2 Band Change Standard and Expanded Frequency Coverage When connected to a transceiver with CAT the amplifier will change frequency bands automatically following the transceiver s operating frequency...

Page 29: ...onic suppression at that The four way antenna switch is controlled automatically or from the amplifier front panel The ACOM 04AT can be installed both in the shack and in a remote location even out in the open close to the antennas It can be distanced up to 100 m 330 ft from the amplifier using a single coaxial cable The connection of ACOM 04AT will make accessible specific features on the amplifi...

Page 30: ...fier will assess the risk and will trigger one of the three levels of protection as described in items a to c below Every event is accompanied by a warning text on the screen see Figure 4 2 Appearance of an alarm message A sound alarm will be also produced if set on in the USER PREFERENCES see Figure 5 5 Menu USER PREFERENCES Figure 4 2 Appearance of an alarm message a The first protection level W...

Page 31: ...n level HARD FAULT The third and most serious protection level is a HARD FAULT The amplifier will be turned off automatically to avoid possible further damages When the protection trips off the data about the fault is stored in the memory and the front panel screen is blanked There is also a sound alarm a series of F sent in CW If the reason for tripping the protection is not obvious you can try t...

Page 32: ...most on Figure 3 2 Basic screen the user invokes the MENU SELECTION screen see Figure 5 1 MENU SELECTION Each menu can be selected by the ITEM up and down buttons and SELECT These are described in Sections 5 1 through 5 6 below The items in each menu are selected and controlled by the same six buttons as in the basic screen but they have new functions now Figure 5 1 MENU SELECTION ...

Page 33: ...CTION in all modes Here you can constantly observe the values of eleven parameters Two identical lists appear on the left and the right halves of the screen each one containing the same 11 values Any value can be selected in each screen half Using buttons ITEM and ITEM up and down select the desired values The two selected values will appear also on the basic screen continuously see field b on Fig...

Page 34: ...uits of the amplifier when serviced We recommend these procedures are carried out only by a trained service technician The necessary service function is selected with the buttons ITEM and ITEM up and down With the SELECT buttons left or right the selected function is turned ON or OFF The inactive functions are greyed out and the active are red When leaving a function submenu it is turned off and d...

Page 35: ... the ITEM buttons up and down Values are selected by the SELECT buttons left or right If the amplifier CAT port is connected either to the transceiver BCD Band Data or Band VOLTAGE output select the respective interface type and push EXIT The other items and values will not be taken into account If the CAT cable is plugged into the transceiver s serial port select the interface and command set acc...

Page 36: ...rface Comm set ELECRAFT RS 232 5 ICOM Connection to the REMOTE jack TTL 1 ICOM Connection to the RS 232 port or CT17 RS 232 1 KENWOOD TS 2000 480 590 890 990 and similar RS 232 5 YAESU FT 101 450 950 991 1200 2000 3000 5000 9000 and similar RS 232 2 YAESU FT 1000MP RS 232 4 YAESU FT 817 857 897 TTL 3 Table 5 1 Transceiver interface ...

Page 37: ...been pressed for more than 5 minutes If AUTOMATIC MENU EXIT is turned off the amplifier remains in the currently selected menu until the EXIT button is pushed c AUTO OPERATE The AUTO OPERATE user setting is described in Sections 3 3 Initial Turning On and 4 1 c AUTO OPERATE user setting d CALL SIGN If entered here a call sign or another text will be included in any Fault Log file generated by the ...

Page 38: ...ode While locked an attempt for entering Operate mode will result in a message OPERATE MODE IS LOCKED The other preference items don t need explanation 5 5 Menu FAULTS LOG This function reads on the screen the information stored in the memory about the last 28 HARD FAULT protection trips see Figure 5 6 Menu FAULTS LOG By pushing the FILE button the information may be also downloaded in a plain tex...

Page 39: ...h the ACTION left YES button once more After restoring the default settings the control will return to the MENU SELECTION screen see Figure 5 1 MENU SELECTION If the ACTION right NO button is pressed the NO is selected again and the control will not leave the current position At pressing the EXIT button in this position the control leaves this menu without changing anything and returns in the prev...

Page 40: ...rol device The operation of ACOM 700S with ACOM eBox is described in the ACOM eBox User s Manual available for download at www acom bg com Use of other remote control devices is not recommended Figure 6 1 ACOM eBox Ethernet Remote Control device 6 2 Remote Control via RS 232 interface The ACOM 700S may be controlled remotely by the RS 232 port For ACOM 700S RS 232 interface protocol Please contact...

Page 41: ...paration of wall outlet If you have any doubts consult with a qualified electrician Periodically check the SWR of the antennas and if this changes over time Problems could occur more often in poor weather conditions rain snow strong wind etc b Air filter Periodically more often in a dusty environment but at least once per year clean the air filter without opening the amplifier CAUTION The air filt...

Page 42: ... 7 3 Fuse Replacement DANGER If replacement of fuses is necessary first pull out the amplifier mains plug from the mains outlet and wait for at least 3 minutes NOTICE For replacement only use standard fuses from the types recommended below The two Primary Mains Fuses of the amplifier are located on the rear panel see Figure 2 1 Rear panel Connections They are fuses of the F type fast acting quick ...

Page 43: ...red from Farnell www farnell com PN 1354551 Mouser www mouser com PN 576 0216016 ESKA PN 520 030 glass body cartridge This fuse can be ordered from TME www tme eu PN ZKS 16A 250V If after Primary Mains Fuses replacement the device does not operate normally we recommend repair performed only by a trained service technician Contact your ACOM dealer for assistance see Section 1 2 Owner Assistance ...

Page 44: ... data can be downloaded from the memory through the RS 232 port and stored in a computer file even if the amplifier cannot be turned on after a serious fault only external power has to be fed to the Control unit in either of the following ways 8 to 15 VDC voltage applied to the Debug mode input see Table 2 1 Signals and pin out of the CAT AUX connector of the CAT AUX port The power supply has to b...

Page 45: ...th the revisions of the hardware and of the boot loader in your amplifier see Section 5 5 Menu FAULTS LOG If you have any doubts about the versions please consult your dealer before you undertake any action When ACOM issues a new firmware version the user can upload it in the amplifier after he checks the compatibility When compatibility is confirmed a return to an earlier version is also possible...

Page 46: ...Distortions IM3 Better than 31 dB below the rated PEP d Harmonic and Parasitic Emissions Output Suppression Better than 60 dB 65 dB typically e Input and Output Impedances Nominal value 50 Ohm unbalanced UHF SO 239 type connectors Input circuit broadband SWR below 1 2 1 1 1 1 typically 1 8 54 MHz continuous range without retuning or switching RF bypass path SWR below 1 1 1 1 8 54 MHz Acceptable SW...

Page 47: ...lsius 95 o F Height up to 3050 m 10000 ft above sea level without output deterioration 8 2 Functions a Receive transmit control KEY IN input Phono RCA jack Voltage applied to the transceiver keying output up to 12 V Current flown to the transceiver keying output up to 6 mA KEY OUT output Phono RCA jack Output resistance not more than 120 Ohm Maximum safe input voltage from the transceiver 50 V max...

Page 48: ... 2 Shipping Size and Weight WxDxH Approx 490x490x340 mm 15 0 kg 19 3x19 3x13 4 inches 33 1 lbs Figure 8 1 Packaging cardboard box 8 3 3 Transportation All types of transportation may be used including storage in an aircraft baggage compartment at up to 12000 meters 40000 ft above sea level 8 3 4 Returning to the Service Provider NOTICE Should it be necessary to ship the amplifier use the original ...

Page 49: ...u should not place the electrical item in the general waste Waste electricals This symbol three green arrows going in a triangle with electrical plug in the center means that according to local laws and regulations this product should be sent for recycling Old electrical and electronic equipment and batteries should be recycled at a facility capable of handling these items and their waste byproduc...

Page 50: ...User s Manual ACOM 700S 1 8 54 MHz Linear Amplifier Page 50 of 52 S e c t i o n NOTES May 2021 NOTES ...

Page 51: ...mplifier May 2021 S e c t i o n NOTES Page 51 of 52 This manual is for electronic distribution mainly If you have it on paper and you no longer need it please recycle it The latest versions of our User s Manuals are available at www acom bg com ...

Page 52: ...I The used images are illustrative only Subject to change without notice I Printed in Bulgaria All rights reserved I Design and content by ACOM Ltd ACOM 700S User s Manual I Fourth Edition Revision 01 I May 2021 ACOM Ltd Bulgaria Bozhurishte 2227 Sofia Bozhurishte Economic Zone 6 Valeri Petrov Str GPS coordinates 42 748616о 23 209801о support acom bg com ...

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