The HL-355VKX is a 144MHz Band Linear Power Amplifier with the maximum output power of 300W (320W max.), designed with Tokyo H-Power's accumulated VHF technologies. Four pes. of high gain RF Fetch, RD70HVF1, by Mitsubishi Electric are used at final stage in the parallel push-pull amp. form. Due fo its high gain HL-355VKX accepts wide range of drive power from 1W to 50W, achieving 25W to 320W of output power. This is a completely solid-state amplifier capable of handling all transmission modes.
2. Specifications 144MHz Band (available for 144-148 MHz) FM, SSB and CW 300W nominal (320W max.) {25 35~40 W typical (1~BOW) 13.8 VDC mp Connectors: Spur = Sgr) Lev I: Accessories: @ RF Output Meter/ LED @ Low-Noise Ga As FET RX Pr-Amp @ Warning Protection Circuit (protections for over-voltage, ANT sim-match, and over-temperature.
3. Explanation of Front and Rear Panels “FRONT PANEL> POWER {MAIN DC POWER SUPPLY SWITCH): A power switch for the TX amp unit. With thé first push, the switch will be Socked, turning the power ON. And POWER LED lamp lights, "With the second push, the knobbly be released to lum the power OFF. Bl rx AMP Power switch for RX preamble. RX, amp works independently. regardless of ON/OFF positions of il POWER switch.
ls] POWER LEVEL Six LED {amps indicate approximate TX power level of amp. If all six is (it, output power is approximately 250 W. Fe Vote ACHY ACES DIS Input Connector) Connect the coaxial cable from the transceiver. Any kind of radios such as handheld, mobile, and base station use can be combined. ACCT {Accessory 1 RCA Jack) Hard-key connection socket when TX to RX change over is made without time delay.
[gl DC13.8 V (DC Power Connector) Connect to regulated DC power supply or 12 V battery system using included DC power cord. (Red is positive and black is negative. Use 40 A minimum capacity.) [10] Fan Wack To connect DC power cable for an optional External Cooling Fan, [11] ACCRA Pin DIN Jack To connect an optional remote controller HR-60 that enables the user to operate the power amp in a remote location. Detailed explanation on this jack and controller will appear later.
This figure shows the basic connection when RF-key is chosen. When hard-key is preferred, control cable from the proper accessory pin of the radios should be plugged to either ACCT or ACCT. (See previous page for the REAR PANEL explanation.) Explanation of ACCRA Pin JACK for Remote Controller Viewed from the outside of the rear panel— The DIN jack accepts the connection of optional remote head (HR-60) that enables the various operations in the remote location. Terminal No.
5. Various Protections When the following Protection trips, “PORT” LED will it and amp will be shut down. 1 Over Temperature (LED lights solidly) When the internal temperature reaches deg. C or above, “PROTRUDED will light. (Leave the amplifier in STAND BY mode until temperature descends well.} 2 Over Voltage {LED blinks in series two times) When DC line voltage exceeds 16V, “PORT” will light, and LED blinks. (Check the DC power supply.