INSTRUCTION MANUAL HF LINEAR POWER AMPLIFIER MODEL : HL-2.
1. Introduction Thank you for purchasing the HL-2.5KFX. This compact and lightweight desktop HF linear power amplifier has a maximum input power of 2.9 kW. Our solid-state broadband power amp technology makes it the smallest and lightest in the industry. Typical output power is 1.5 kW PEP/SSB with the drive power of 85-90 W.
inserted at both ends of the remote control cable, ALC cable, coaxial jumper cable, and antenna cables, as needed. Also, a common mode AC line filter (near the AC outlet), and in-line low pass filters on the antenna coaxial cable, (as necessary), are recommended. 2-7 The amplifier has fast acting sophisticated protection circuits controlled by the latest microprocessor technology.
2-13 For long continuous operation in RTTY/FM modes, it is recommended you reduce the RF drive levels by 20% to 30% lower output than CW/SSB modes. 2-14 To prevent damage to the precision electronic components, avoid extreme physical shock to the amplifier. If factory service is required, the amplifier MUST be shipped using the original box and packaging materials. 3. Features 3-1 Our solid-state broadband design engineers worked to make the HL-2.5KFX, the lightest and most compact 1.
3-7 This amplifier is compatible with AC 220 V and 240 V (200/230/250 V included). See the illustration in the AC Power Section for changing primary wiring of the power transformer. 3-8 For the safety of the operator, an Interlock system is employed. The AC power is shut down if the top cover is removed, and the automated safety interlock is activated. 3-9 An analog multimeter allows the operator to monitor Pr (Reflected power), Vd (Drain voltage of power FET), Id (Drain current) and ALC voltage.
4. Specifications Frequency : 1.8 ~ 28 MHz all amateur bands including WARC bands Mode : SSB, CW, RTTY RF Drive : 85W typ. (100W max.) Output Power : 1.5 kW PEP/CW (typ.) (1.2 kW on 28 MHz band) Matching Transceivers for Auto Band Decoder : Most ICOM, Yaesu, Kenwood Drain Voltage : 120 V (when no RF drive) Drain Current : 25 A max.
5. AC Line Voltage 5-1 The amplifier is designed to work with AC 240 V (200- 250 V). 5-2 The correct AC plug (not included in the package), must be obtained locally due to the AC plug variations worldwide. 5-3 The AC voltage has been factory preset for 240 V use (or as requested by the customer at the time of order). See the other illustration for AC voltages other than 240 V. For your safety, before making these adjustments, be sure to pull the AC plug from the AC outlet to avoid injury.
6-A Front Panel Description ⑥ ⑦ ① ①POWER ② ⑧ ⑨ ③ ④ ⑤ Main power switch to turn AC power on and off. LED (green) lights when turned on. ②OPER. OPERATE/STAND-BY switch. At OPERATE, the amplifier is ready to go into ON AIR (TX) mode and at STBY, it is on STAND-BY mode. ③METER To change the multimeter scales. Meter reads Pr, Vd, and Id, and ALC. ④BAND-AUTO/MAN’L To select band switching methods AUTO or MANUAL. When using AUTO, the manufacturer for the transceiver in use should be selected.
⑦MULTIMETER PR(Reflected power from antenna), VD (FET drain voltage), and ID(FET drain current) and ALC voltage are shown on the scale as selected by ③METER select switch. Full scales are; PR:250 W, VD: 150 V, ID: 40 A, ALC: -10V. ⑧ON AIR, FAN, ID, PROT(LED) ON AIR : Lights when the amplifier is in transmit(TX) mode. FAN : Lights when cooling fan is running at high speed. When the heat sink temperature reaches 40℃, cooling fan speed will continuously increase to enhance cooling capacity.
6-B Rear Panel Description ① ② ③ ④ ⑤ ⑥ ⑦ ⑧ ⑨ ⑩ ⑪ ⑫ ⑬ ①ANT A RF Output Connector. Connect the coax cable to the antenna. ②INPUT RF Input Connector. Connect the coax jumper cable from the transceiver. ③CONT D-Sub (15pin) Socket. Connect the band data cable to the transceiver. ④TUNER DIN Socket. Connect the control cable from External Auto Antenna Tuner, HC-1.5KAT. ⑤TRXSEL Switch to select the transceiver manufacturer (i.e. ICOM, Yaesu, Kenwood). ⑥GND Ground Terminal.
SEND, TX GND etc.) of the transceiver. Electrical conditions are 12 V DC of open voltage at receive mode (RX), and short current of 35 mA at transmit mode (TX). ⑫ALC RCA Jack for ALC Voltage Output. Negative DC voltage appears at the center pin, which is fed back to the ALC terminal of the transceiver. ALC is used to keep the amplifier output power at certain limits. Also it is useful when the transceiver output power is higher than 100 W (See page 16, Section 9. ALC Connection).
7. Connection 7-1 Connection to Transceiver and Tuner HC-1.5KAT Control Cable Band Data Cable HL-2.5KFX Transceiver SEND/ ALC STBY ANT ◎ ◎ ◎ ◎ 230 V AC Cord ALC Cable PTT Cable Coax Jumper Cable Connector and Cable List HL-2.
7-2 Technical Information Equivalent Circuit of SEND Terminal Equivalent Circuit of ALC Output 12
8. Operation ***CAUTION: Under the Manual Band Set operation, always be sure to check if BAND Switch position matches that of your radio before keying PTT or the CW paddle. Also when you have changed the BAND, do not make the full power CW (carrier) drive but reduced level power to see if the BAND is set correctly and the amplified RF power comes out properly. Full power CW drive under the BAND Mis-set leads to the failure of the valuable final power FET devices.
8-2 8-2-1 How to Operate Connect AC cord and coax cables as illustrated in Section 7 Connection. Connect the cable from “SEND” to ACC or the remote terminals of transceiver, where it is marked “SEND” or “TX GND”. These terminal pins are shorted to ground when the transceiver is in TX/ON AIR mode. If these connections are not made, the amplifier will not go into TX (amplification) mode.
8-2-5 You can now increase the drive level to nearly 80-90W to achieve maximum carrier output power of 1.4 kW (CW, RTTY) from the amplifier. If you change to SSB mode, peak voice power will reach approximately 1.5 kW. For high duty cycle transmissions like RTTY, SSTV, or FM modes, it is recommended you reduce the drive power by 20-30 % compared with SSB/CW. 8-2-6 With a high power transceiver in SSB mode, you can overdrive the amplifier resulting in a distorted output signal.
always need to connect ALC to the transceiver, if you set the mic gain properly and do not overdrive the amplifier. Depending upon the manufacturer of the transceiver, the suitable ALC voltage differs. ICOM may need 0~-4 V, and Yaesu may need 0~-5 V range.. Kenwood may need -6~-8 V maximum. Check your transceiver manual. 9-1 Prepare an ALC control cable using the RCA plug supplied in the package.
10. Band Data Cable Connection This section explains about the methods of the auto band setting Collaboration with the modern transceivers of ICOM, Yaesu and Kenwood. To make this setting, it is needed that the band data cable is connected to “CONT” connector as well as selecting “TRXSEL” for the proper radio manufacturer. Turn off AC powers of both the amplifier and the transceiver when you connect this data cable. Be sure to confirm the auto band set on each band, after you finish above settings.
10-2 ① ② ICOM CI-V HL-2.5KFX Setting TRXSEL: “C” LCD: “CIV” Wiring: Fig. B TRX ACC Transceiver Setting CI-V BAUD RATE: 9600 [bps] CI-V ADDRESS: 5 Ch CI-V Transceiver: ON CI-V with IC-731: OFF 1 9 2 10 3 11 4 12 5 13 6 14 7 15 8 ICOM CI-V DATA WIRING 3.5mm PHONE PLUG (See ICOM radio manual for the details.) 10-3 Yaesu Band Data ① HL-2.5KFX Setting TRXSEL: “Y” ② LCD: “YSU” Wiring: Fig.
11. Protection & Safety Circuits 11-1 Protection Circuits HL-2.5KFX is equipped with ten protection circuits as shown in the table below. Protections are commanded by the 16bit microprocessor chip, and DC drain voltage (120 V) is cut off, when the protection circuit works. Also PROT lamp is lit and the amplifier becomes “through” state. If PROT lamp is blinking, you may reset the shut down with OPER/STBY switch. Reason for the shut down is displayed on LCD panel except for some cases.
11-2 Safety Circuits In addition to the protection circuits above, there are other safety circuits (inter-locked circuits) built in the amplifier. They directly shut down AC power line for the primary of the power transformer, and if shut down, AC power lamp (green), LCD display and cooling fan will all go off. In case this shut down has suddenly occurred during the transmission, stop transmitting first and wait for several minutes. Pull off AC power plug and check whether or not AC main fuses are blown.
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