USER`S MANUAL rev.3.0 HVLA1K3 1300
Contents
1. Keep the original boxes and packaging materials if factory service is required the amplifier must be shipped using the original boxes and packaging materials These symbol present on the products packaging documentation or other mean that used electrical and electronics products should not be mixed with household waste European Directive 2002 96 EC Please consult your national legislation for treatment recovery and recycling of this type of products Page 4 2 SPECIFICATIONS Frequency Coverage Operation Mode Operating Frequency Band I nput Drive Power typ AMP Input VSWR max VSWR Output Protection typ Output Power Efficiency typ PA Power Gain typ Output Filter type Output Filter Band Harmonics Suppression Third Order I MD I N OUT I mpedance RF POWER TRANSISTOR Amplifier Circuitry Cooling RX TX Switching Time Power Supply Protections Other Protections DC Internal Power Supplies AC Power Supply Range Power Rating max Dimensions max Weight HVLA1K3 USER S MANUAL rev 3 0 1 8 to 54 MHz all amateur frequencies WARC included All modes Automatic for KENWOOD ICOM YAESU ELECRAFT transceiver 40 watts 1 2 1 2 1 1300 watts 75 15 dB Low pass type 160 80 40 30 20 17 15 12 10 6 meter HF better than 45dB VHF better than 60dB 30 dBc 50 ohms unbalanced Amphenol SO 239 connecto2. USER S MANUAL rev 3 0 HVLA1K3 1300 WATTS 1 8 54 MHz SOLID STATE AUTOMATIC LINEAR AMPLIFIER lt 2 gt T Dd P DN CE px HVLA1K3 USER S MANUAL rev 3 0 INDEX Section 1 INTRODUCTION Important Precautions 2 SPECI FI CATIONS 3 FRONT PANEL DESCRI PTI ON 4 REAR PANEL DESCRIPTION 5 PRELI MINARY PRECAUTIONS Amplifier location Connection to AC power supply Ground Antenna 6 Connection and operation with KENWOOD transceiver Important notes 7 Connection and operation with I COM transceiver Important notes 8 ICOM transceiver control cable schematic diagram 9 Connection and operation with YAESU transceiver Important notes 10 YAESU transceiver control cable schematic diagram 11 Connection and operation with K3 ELECRAFT transceiver Important notes 12 K3 ELECRAFT transceiver control cable schematic diagram 13 Protection circuits 14 TROUBLE SHOOTING Addendum Warranty CE Declaration of Conformity BLOCK DI AGRAM LO LO WO LO O 10 11 12 13 12 13 14 15 14 15 16 17 16 17 18 19 20 21 21 22 Amphenol Elecraft Freescale Icom Yaesu Kenwood are registered trademarks of respective companies Page 1 HVLA1K3 USER S MANUAL rev 3 0 1 INTRODUCTION Thank you for purchasing our next generation solid state linear amplifier model HVLALK3 This amplifier with built in power supply provide u
3. Don t turn ON the amplifier before connected the ANTENNA a hazardous RF voltage may be present on the antenna connector with no antenna connected Don t disconnect an antenna during transmission fire or electric shock may be possible Don t expose the amplifier to rain snow or any other liquids fire or electric shock may be possible Don t touch the case of the amplifier with damp or wet hands electric shock may be possible The amplifier may cause interference and it can influence other electrical appliances In such cases the user must be take proper actions to reduce the interference Before opening the cover of the amplifier wait an hour after transmission the heat generated by the internal components of the amplifier may cause burns to your hands Don t install the amplifier in a place without a very good ventilation the poor heat dissipation generated in this situation may damage the amplifier Page 3 HVLA1K3 USER S MANUAL rev 3 0 Don t obstruct the entries for cooling present in the cover of the amplifier the poor heat dissipation generated in this situation may damage the amplifier Don t place the amplifier near walls or other obstacles the poor heat dissipation generated in this situation may damage the amplifier Don t use the amplifier in locations with temperatures below 0 C or above 35 C Don t place the amplifier in locations exposed to direct sunlight dusty or damp
4. OUT This 3 position rotary switch set in standby the amplifier in addition to set the RF output power in low or high level The amplifier is in standby mode amp ON but not operating when the green LEDs marked LOW and HIGH are lit 6 LOW Green LED lights when RF low output power level has been chosen if not the amplifier is in standby mode Page 6 HVLA1K3 USER S MANUAL rev 3 0 7 HI GH Green LED lights when RF high output power level has been chosen if not the amplifier is in standby mode 8 ANTENNA This 2 position rotary switch select a primary antenna ANT A or a second antenna dummy load ANT B 9 ANTA Green LED lights when the primary antenna has been chosen This is the antenna output also when the amplifier is turned OFF Maximum allowed power in bypass mode Is 200 watts 10 ANT B Green LED lights when a second antenna or a dummy load has been chosen This function is possible only when the amplifier is turned ON 11 TX Red LED lights when the amplifier is in transmit operative mode 12 OVT Red LED lights when the PA module reaches a high temperature and the auto reset protection circuit has worked 13 FAULT Red LED lights when a high antenna VSWR typ 2 1 or a wrong band situation is detected to indicate protection circuit has worked 14 OVD Red LED lights when input overdrive is detected to indicate protection circuit has worked 15 ON Red LED lights when power is turned ON
5. without the use of adaptors or other accessories Before connecting the amplifier to your mains supply be sure that the supply is correctly wired and rated for the current drawn by the amplifier up to 10 A The installation leads must be at least 1 5 mm or 15 AWG If you connect the amplifier to a different mains outlet be sure that you check it too 5 3 Ground Connect the ground stud of the amplifier on the rear panel marked GROUND to the station s grounding system A proper ground connection will result in reduced RF strays or noises and avoid points of RF high voltages during transmission on metallic objects that may come into contact with the operator 5 4 Antenna The amplifier is designed for use with antennas that present an impedance of 50 ohms at the operating frequency Connect a coaxial cable from the amplifier output on the rear panel marked ANT A and ANT B with a PL 259 plug to the antenna for the respective band We recommend that you use RG213 or better coaxial cable If antenna VSWR is 1 8 1 higher at Operating band the antenna has to be adjusted for lower VSWR in this condition an antenna tuner must be inserted Page 9 HVLA1K3 USER S MANUAL rev 3 0 6 CONNECTION AND OPERATION with KENWOOD transceiver 6 1 Connect AC power cord and coax cables as mentioned on page 9 Run a shielded cable from the transceiver REMOTE connector to the amplifier rear panel RELAY phono RCA f
6. of the transmission high speed CW Full Break in mode when the amplifier is in use Required drive power is slightly less than 40 watts to obtain the full over 1000 watts output power Do not attempt to operate with excessive drive power from a high power transceiver Absolutely never rotate the BAND STBY OUT and ANTENNA rotary switches during operation Use of the amplifier with an incorrect band filter selected or without a well adjusted antenna may damage the amplifier Page 11 HVLA1K3 USER S MANUAL rev 3 0 7 CONNECTION AND OPERATION with I COM transceiver This section explains a one antenna connected to an ICOM transceiver provided of Band Voltage Output pin 7 1 Connect AC power cord and coax cables as mentioned on page 9 Run a shielded control cable see page nr 13 from the remote terminals transceiver producers give different names to this output please check your transceiver s manual to the amplifier rear panel AUTO B D SUB 9 pin male connector 7 2 Usea short 50 ohms coaxial cable tyoe RG58 or equivalent for the connection from the RF output of the transceiver to the amplifier rear panel RF IN SO 239 connector 7 3 Keeping the main power switch OFF check the VSWR of your antenna by keeping the transceiver to TX mode CW FM or RTTY mode Monitor the VSWR with an external SWR power meter If VSWR is 1 8 1 or higher the antenna has to be adjusted for lower VSWR A
7. 16 ON OFF Main power switch to turn AC power ON and OFF 17 METER 2 4 colour TFT screen reading the RF output power and VSWR antenna level Notel never exceed the value of the RF output power level indicated as HIGH in the reading bar Note2 never exceed the VSWR antenna level indicated as HIGH ideal an indication to the middle or as low as possible in the reading bar Page 7 HVLA1K3 USER S MANUAL rev 3 0 REAR PANEL DESCRI PTI ON 8 AUTO B 1 POWER SUPPLY 4 100 240VAC 2000VA ANT A ANT B GROUND o 8 1 AUTO B D SUB 9 pin male connector for control cable from ICOM YAESU ELECRAFT transceiver 2 RELAY Opto Isolated input RCA female connector for control cable from KENWOOD transceiver or other brand The center pin is to be shorted to ground through the relay circuit of the transceiver the total keying current is under 10 mA Note when you use this connector with no KENWOOD transceiver the amplifier will not be operative in auto mode 3 AUTOA D SUB 9 pin male connector for control cable from KENWOOD RS 232 COM port transceiver 4 POWER SUPPLY IEC type C14 AC Mains Socket Socket for the AC power cord with two 10A 5x20 fast type fuses included socket is EMI filtered 5 RFIN Amphenol SO 239 RF input connector Connect the coax jumper cable from the transceiver 6 ANTA Amphenol SO 239 primary RF output connector Connect the coax cabl
8. BY OUT and ANTENNA rotary switches during Operation Use of the amplifier with an incorrect band filter selected or without a well adjusted antenna may damage the amplifier 10 YAESU TRANSCEIVER CONTROL CABLE SCHEMATIC DIAGRAM This section explains the electrical connections to control the amplifier with a YAESU transceiver provided of Band Data pins AUTO B D SUB 9 pin male connector NOTE as viewed from rear panel D SUB 9 pin NR CONNECT TO YAESU REMOTE TERMINALS NAMED LINEAR BAND DATA BAND DATAA BAND DATA B BAND DATA C BAND DATA D N C GND GROUND WOON OA URWN kb lt O Note as cable use a five wire plus shield quality shielded cable Page 15 HVLA1K3 USER S MANUAL rev 3 0 11 CONNECTION AND OPERATION with K3 ELECRAFT transceiver This section explains a one antenna connected to a K3 ELECRAFT transceiver provided of D SUBHD 15 pin ACC connector 11 1 Connect AC power cord and coax cables as mentioned on page 9 Run a shielded control cable See page nr 17 from K3 ACC Connector to the amplifier rear panel AUTO B D SUB 9 pin male connector 11 2 Use a short 50 ohms coaxial cable type RG58 or equivalent for the connection from the RF output of the transceiver to the amplifier rear panel RF IN SO 239 connector 11 3 Keeping the main power switch OFF check the VSWR of your antenna by keeping the transceiver to TX mode CW FM o
9. LA1K3 USER S MANUAL rev 3 0 14 TROUBLE SHOOTING The following table analyzes some common faults and their correction AC mains not operating Fault Possible Cause Solution O Z O O a AC fuses blown a Replace with new ones b AC cord not plugged connected Transmit Can t enter mode b Protection circuits ON b Check the drive power antenna VSWR wrong band selected antenna selector A or B high temperature a Control cable not a Check the control cable and connect properly Reset with AC power switch lights high cooling fins unobstructed Also check the VSWR of the antenna system since a high VSWR increases the heat dissipation by the amplifier causing faster temperature a lnternal temperature a Ensure adequate airflow around the unit Keep the rise Reduce drive level or duty cycle Over drive lights Ensure antenna is resonant at the desired frequency a High antenna VSWR a Check integrity of antenna and feedline connections b Match the band correctly a RF overdrive a Decrease drive b RF leakage from coax b Insert common mode filters on antenna cable or AC cable grounding wire line Add clamps on ferrite cores on various cables AC power cord etc Page 20
10. e to the primary antenna 7 ANTB Amphenol SO 239 second RF output connector Connect the coaxial cable to the second antenna or a dummy load 8 GROUND Ground terminal Page 8 HVLA1K3 USER S MANUAL rev 3 0 5 PRELIMINARY PRECAUTIONS Before you start to install the amplifier fully read this manual Carefully remove the amplifier from its boxes and packaging materials and inspect for physical damage incurred during shipping If any damage is found contact immediately your supplier Keep the original boxes and packaging materials if factory service is required the amplifier must be shipped using the original boxes and packaging materials 5 1 Amplifier location The amplifier must be located in a cool and dry area with large space around the amplifier to allow good ventilation to all surfaces and free flow of the air Don t obstruct the entries for cooling present in the cover of the amplifier and don t place the amplifier near walls or other obstacles Reduced airflow conditions can severely damage the amplifier 5 2 Connection to AC power supply The amplifier features an internal high efficiency switching power supply It accepts the wide AC line voltage ranging from 100 VAC to 240 VAC 50 60 Hz automatically Before connecting the amplifier verify that your mains supply is in accordance with the specifications of the amplifier The amplifier must be connected directly to the mains supply with the supplied AC power cord
11. ection 13 PROTECTION CIRCUITS 11 8 IMPORTANT NOTES For high duty cycle transmissions like RTTY it is recommended that you use the low output power position green LED LOW lit up For normal cycle transmissions like SSB you can use the high output power position green LED HIGH lit up Due to the relatively low switching time of the TX RX relays we don t guarantee the use of the transmission high speed CW Full Break in mode when the amplifier is in use Required drive power Is slightly less than 40 watts to obtain the full over 1000 watts output power Do not attempt to operate with excessive drive power from a high power transceiver Page 16 HVLA1K3 USER S MANUAL rev 3 0 Absolutely never rotate the BAND STBY OUT and ANTENNA rotary switches during operation Use of the amplifier with an incorrect band filter selected or without a well adjusted antenna may damage the amplifier 12 K3 ELECRAFT TRANSCEIVER CONTROL CABLE SCHEMATIC DI AGRAM This section explains the electrical connections to control the amplifier with a K3 ELECRAFT transceiver provided of D SUBHD 15 pin ACC connector AUTO B D SUB 9 pin male connector NOTE as viewed from rear panel D SUB 9 pin NR CONNECT TO K3 ELECRAFT ACC CONNECTOR NAMED BANDO OUT BAND1 OUT BAND2 OUT BAND3 OUT WOON OU P WM FE lt AO GROUND Note as cable use a five wire plus shield quality shield
12. ed cable Page 17 HVLA1K3 USER S MANUAL rev 3 0 13 PROTECTION CIRCUITS There are many protection functions in this amplifier If the amplifier has shut down for some reasons before re setting correct the possible cause of the shut down Turn OFF the main AC power switch once and back ON to reset If the amplifier is operated in such a manner that multiple protections work repeatedly over a long period of time the amplifier can be seriously damaged 13 1 OVT Over Temp Red LED marked OVT lights when the PA module reaches a high temperature and the protection circuits has worked Check for air intake blockages and air vent on cover When the amplifier is in protection mode wait a ten minutes or more the protection Is auto resetting 13 2 FAULT High antenna VSWR Wrong Antenna Band select Red LED marked FAULT lights when a high antenna VSWR 1 8 1 or higher a wrong output antenna has been selected or a wrong band situation is detected to indicate protection circuit has worked In case of high antenna VSWR one solution is to reduce the drive power from the transceiver or you may need to check that antenna VSWR is still OK If the match cannot be corrected and the antenna system is not faulty use an antenna tuner In case of wrong band select the correct filter band If you have select a wrong band two situations can happen a if the selected filter cut off frequency or correspondent band is lower than the one o
13. emale connector The phono RCA female connector center pin is to be shorted to ground through the relay circuit of the transceiver the total keying current is under 10 mA If these connections are not made the amplifier will not go into TX amplification mode For a temporary check to the amplifier ground the RELAY center pin by inserting a RCA plug whose center pin has been soldered to the outer case of the plug with a small piece of wire 6 2 Connect a right DSUB 9pin female DSUB 9pin female high quality shielded cable from RS 232 COM port of your transceiver to the amplifier rear panel AUTO A D SUB 9pin male connector 6 3 Set RS 232 COM port of your transceiver to 19200 bps and 1 stop bit 6 4 Use a short 50 ohms coaxial cable type RG58 or equivalent for the connection from the RF output of the transceiver to the amplifier rear panel RF IN SO 239 connector 6 5 Keeping the main power switch OFF check the VSWR of your antenna by keeping the transceiver to TX mode CW FM or RTTY mode Monitor the VSWR with an external SWR power meter If VSWR is 1 8 1 or higher the antenna has to be adjusted for lower VSWR As an alternative an antenna tuner may be inserted 6 6 Turn the main power switch ON Turn the BAND rotary switch to AUTO A position green LED AUTO A will light Turn the ANTENNA rotary switch to a specific antenna if necessary Turn the STBY OUT rotary switch to the low
14. er output power of more 1000 watts from the amplifier Monitor the output power and if the antenna VSWR stays constant as higher RF current flow some antennas may show a changed VSWR due to heated components such as trap coils 9 6 With a high power transceiver in SSB mode you can overdrive the amplifier in a distorted output signal This can occur if you speak too loud or if you set the microphone or compressor gain too high Speak into the microphone properly to reduce the possibilities of spattering into the neighborhood You can reduce the RF output power also 9 7 Protection circuits may work during operation depending on the conditions For more details on this protection circuits see section 13 PROTECTION CIRCUITS 9 8 IMPORTANT NOTES For high duty cycle transmissions like RTTY it is recommended that you use the low output power position green LED LOW lit up For normal cycle transmissions like SSB you can use the high output power position green LED HIGH lit up Due to the relatively low switching time of the TX RX relays we don t guarantee the use of the transmission high speed CW Full Break in mode when the amplifier is in use Required drive power Is slightly less than 40 watts to obtain the full over 1000 watts output power Do not attempt to operate with excessive drive power from a high power transceiver Page 14 HVLA1K3 USER S MANUAL rev 3 0 Absolutely never rotate the BAND ST
15. f the transceiver the protection will immediately shut down the amplifier b if the selected filter cut off frequency or correspondent band is higher than the one of the transceiver is probable that the protection will not shut down the amplifier but you will have an emission full of unwanted harmonics 13 3 OVD Overdrive Red LED marked OVD lights when input overdrive is detected to indicate protection circuit has worked in order to protect the input side of the power LDMOS The solution Is to reduce the input drive power 13 4 AC mains power supply FUSES If either of the glass fuses 2x10A 5x20 fast type on IEC type C14 AC mains socket fails we recommend do not replace the fuses and we invite you to consult the factory IEC plug type C14 eh Fuses Holder Page 18 HVLA1K3 USER S MANUAL rev 3 0 13 5 Power Supply Unit PSU protections The internal switching power supply unit features the following automatic protections Soft start Short circuit Over current Over voltage Over temperature A built in green LED check its normal activity If the green LED is OFF means that the PSU is in an auto protect condition or AC mains power supply fuses are blown EE E E i SE ken sl C COOC Another important feature of this PSU is its built in PFC Power Factor Corrector circuit with a value better than 0 95 in according to the new European Rules on Energetic Efficiency Page 19 HV
16. ion explains a one antenna connected to a YAESU transceiver provided of Band Data Output pins 9 1 Connect AC power cord and coax cables as mentioned on page 9 Run a shielded control cable see page nr 15 from the remote terminals transceiver producers give different names to this output please check your transcelver s manual to the amplifier rear panel AUTO B D SUB 9 pin male connector 9 2 Use a short 50 ohms coaxial cable type RG58 or equivalent for the connection from the RF output of the transceiver to the amplifier rear panel RF IN SO 239 connector 9 3 Keeping the main power switch OFF check the VSWR of your antenna by keeping the transceiver to TX mode CW FM or RTTY mode Monitor the VSWR with an external SWR power meter If VSWR is 1 8 1 or higher the antenna has to be adjusted for lower VSWR As an alternative an antenna tuner may be inserted 9 4 Turn the main power switch ON Turn the BAND rotary switch to AUTO B position green LED AUTO B will light Turn the ANTENNA rotary switch to a specific antenna if necessary Turn the STBY OUT rotary switch to the low output power position of the amplifier green LED LOW will light Now key the transceiver with the carrier level set relatively low such as 10 watts and monitor the antenna VSWR and the output power with an external power meter 9 5 Now increase the drive level to nearly 40 watts to achieve maximum carri
17. output power position of the amplifier green LED LOW will light Now key the transceiver with the carrier level set relatively low such as 10 watts and monitor the antenna VSWR and the output power with an external power meter 6 7 Now increase the drive level to nearly 40 watts to achieve maximum carrier output power of more 1000 watts from the amplifier Monitor the output power and if the antenna VSWR stays constant as higher RF current flow some antennas may show a changed VSWR due to heated components such as trap coils 6 8 With a high power transceiver in SSB mode you can overdrive the amplifier in a distorted output signal This can occur if you speak too loud or if you set the microphone or compressor gain too high Speak into the microphone properly to reduce the possibilities of spattering into the neighborhood You can reduce the RF output power also 6 9 Protection circuits may work during operation depending on the conditions For more details on this protection circuits see section 13 PROTECTION CIRCUITS Page 10 HVLA1K3 USER S MANUAL rev 3 0 6 10 IMPORTANT NOTES For high duty cycle transmissions like RTTY it is recommended that you use the low output power position green LED LOW lit up For normal cycle transmissions like SSB you can use the high output power position green LED HIGH lit up Due to the relatively low switching time of the TX RX relays we don t guarantee the use
18. p to 1300 watts RF input power with about 40 watts drive power on the 160 through 6 meter HF VHF amateur radio bands including the WARC bands This compact and lightweight amplifier employ the new generation of FREESCALE high ruggedness and efficiency 50V RF power LDMOS MOSFETs The built in decoder which allow you to forget about the band setting and the electronic solutions adopted give this amplifier the most complete and very easy to operate in the market 1 1 Important Read the present manual carefully before attempting to operate the linear amplifier This manual contains important safety and operating instructions warranty will be invalidated in the case of non observance of these instructions This manual may be subject to changes and updates 1 2 Precautions A For your safety and to minimize local EMI RFI the amplifier must be properly grounded before operation A Before connecting the amplifier verify that your mains supply is in accordance with the specifications of the amplifier K The AC power supply cord must be correctly rated and wired if it s not correctly rated and wired there is a risk of fire or electric shock A Before opening the cover of the amplifier make sure that AC power supply cord has been disconnected Take out AC power supply cord from the outlet Wait at least 1 minute for internal voltages to complete their discharge Page 2 HVLA1K3 USER S MANUAL rev 3 0 K
19. put power position green LED LOW lit up For normal cycle transmissions like SSB you can use the high output power position green LED HIGH lit up Due to the relatively low switching time of the TX RX relays we don t guarantee the use of the transmission high speed CW Full Break in mode when the amplifier is in use Required drive power Is slightly less than 40 watts to obtain the full over 1000 watts output power Do not attempt to operate with excessive drive power from a high power transceiver Page 12 HVLA1K3 USER S MANUAL rev 3 0 Absolutely never rotate the BAND STBY OUT and ANTENNA rotary switches during operation Use of the amplifier with an incorrect band filter selected or without a well adjusted antenna may damage the amplifier SG ICOM TRANSCEIVER CONTROL CABLE SCHEMATIC DIAGRAM This section explains the electrical connections to control the amplifier with an COM transceiver provided of Band Voltage Output pin AUTO B D SUB 9 pin male connector NOTE as viewed from rear panel D SUB 9 pin NR CONNECT TO I COM REMOTE TERMINALS NAMED ACC2 7 pole DIN ACC 13 pole DIN BAND SEND HSEND 8 NOTE SOLDER TOGETHER D SUB 9 pin PINS GND GROUND ON OU a WM kM Note as cable use a two wire plus shield quality shielded cable Page 13 HVLA1K3 USER S MANUAL rev 3 0 9 CONNECTION AND OPERATION with YAESU transceiver This sect
20. r RTTY mode Monitor the VSWR with an external SWR power meter If VSWR is 1 8 1 or higher the antenna has to be adjusted for lower VSWR As an alternative an antenna tuner may be inserted 11 4 Turn the main power switch ON Turn the BAND rotary switch to AUTO B position green LED AUTO B will light Turn the ANTENNA rotary switch to a specific antenna if necessary Turn the STBY OUT rotary switch to the low output power position of the amplifier green LED LOW will light Now key the transceiver with the carrier level set relatively low such as 10 watts and monitor the antenna VSWR and the output power with an external power meter 11 5 Now increase the drive level to nearly 40 watts to achieve maximum carrier output power of more 1000 watts from the amplifier Monitor the output power and if the antenna VSWR stays constant as higher RF current flow some antennas may show a changed VSWR due to heated components such as trap coils 11 6 With a high power transceiver in SSB mode you can overdrive the amplifier in a distorted Output signal This can occur if you speak too loud or if you set the microphone or compressor gain too high Speak into the microphone properly to reduce the possibilities of spattering into the neighborhood You can reduce the RF output power also 11 7 Protection circuits may work during operation depending on the conditions For more details on this protection circuits see s
21. rs MRFE6VP61K25 FREESCALE LDMOS MOSFETs Push pull AB class Dual speed forced air cooling by built in dual ball bearing fan Lower than 10ms Short circuit over current over voltage over temperature Power ON soft start circuit High antenna VSWR wrong band input overdrive over temperature 50 VDC 12 VDC 100 VAC to 240 VAC 50 60Hz 2000VA 34 5 x 33 x 18 5 cm 13 6 x 13 x 7 3 in W xD xH About 12 kg 26 5 Ib Page 5 HVLA1K3 USER S MANUAL rev 3 0 3 FRONT PANEL DESCRIPTION 4 CD nS ate 15 on So ANT A NZ T 30 20 l 7 15 ANTENNA 12 10 14 ovo by 43 FAULT Sch Wh aes S HIGH pod Fs OVT D iw 2 x X2 11 STBY OUT ON OFF im 5 16 R F po Wer SOLID STATE HF VHF LINEAR AMPLIFIER 1 BAND This 9 position rotary switch select the manual green LEDs AUTO A and AUTO B unlit or auto desired operating frequency band 2 AUTO A Green LED lights when operating frequency band is automatically controlled by KENWOOD transceiver if not the manual operating frequency band has been chosen 3 AUTOB Green LED lights when operating frequency band is automatically controlled by ICOM YAESU or ELECRAFT transceiver if not the manual operating frequency band has been chosen 4 160 80 40 30 20 17 15 12 10 6 Green LED lights according to the desired operating frequency band both for auto or manual operating frequency band selection 5 STBY
22. s an alternative an antenna tuner may be inserted 7 4 Turn the main power switch ON Turn the BAND rotary switch to AUTO B position green LED AUTO A will light Turn the ANTENNA rotary switch to a specific antenna if necessary Turn the STBY OUT rotary switch to the low output power position of the amplifier green LED LOW will light Now key the transceiver with the carrier level set relatively low such as 10 watts and monitor the antenna VSWR and the output power with an external power meter 7 5 Now increase the drive level to nearly 40 watts to achieve maximum carrier output power of more 1000 watts from the amplifier Monitor the output power and if the antenna VSWR stays constant as higher RF current flow some antennas may show a changed VSWR due to heated components such as trap coils 7 6 With a high power transceiver in SSB mode you can overdrive the amplifier in a distorted output signal This can occur if you speak too loud or if you set the microphone or compressor gain too high Speak into the microphone properly to reduce the possibilities of spattering into the neighborhood You can reduce the RF output power also 7 7 Protection circuits may work during operation depending on the conditions For more details on this protection circuits see section 13 PROTECTION CIRCUITS 7 8 IMPORTANT NOTES For high duty cycle transmissions like RTTY it is recommended that you use the low out
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