HL-2500FX review

| septiembre 3, 2013

HL-2500FX TOKYO HY-POWER

HF linear power amplifier

Typical output power is 1.5 kW PEP/SSB on HF (1kW on 50MHz) with the drive power of 85-90 W. The built-in band decoder will let you forget about the band setting when the amplifier is connected to your modern radio through such band data cables as ICOM CI-V, DC voltage (Yaesu and Elecraft K3), and RS-232C (Kenwood). These data cables are optional parts. The one that matches your radio should be purchased separately.

HL-2500FX TOKYO HY-POWER

Features

- Our solid-state broadband design engineers worked to make the HL-2500KFX, the lightest and most compact 1.5 kW amplifier in the industry. This world-class compact 1.5 kW amplifier is the easiest to handle and operate.

-  The amplifier is equipped with a newly developed band decoder. The amplifier’s decoder changes bands automatically as the data signal is received from the associated HF transceiver’s frequency bands.

- The amplifier’s main PA section includes 6 high power MOS FET THP2933′s by Microsemi, resulting in 1.5 kW PEP (SSB max.). The amplifier’s broadband characteristics require no further tuning once the operating band is selected.

-  The amplifier allows operation in full break-in CW mode due to the use of the amplifier’s high- speed antenna relays (made by Panasonic).

- With the unique duct structure design and the powerful blower fan, the aluminum heat sink block for RF PA module (and other components), are effectively cooled. The fan’s quiet operation allows for even the weakest DX signals to be heard.

-  The amp utilizes an advanced 16 bit MPU (microprocessor) to run the various high speed protection circuits such as overdrive, high antenna SWR, DC overvoltage, band mis-set etc.

-  This amplifier is compatible with AC 200 V and 250 V as well as AC 100V to 125V.

- 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.

- An analog multimeter allows the operator to monitor Pr (Reflected power), Vd (Drain voltage of power FET), Id (Drain current) and ALC voltage.

- For future expansion, the amplifier rear panel is equipped with a control cable connection socket TUNER, this is for the upcoming model HC-1500AT, auto antenna tuner by Tokyo Hy-Power Labs. in 2013.

HL-2500FX TOKYO HY-POWER

HL-2500FX TOKYO HY-POWER

Specifications

Frequency :……. 1.8 ~ 50 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 kW on 50 MHz band)

Matching Transceivers for Auto Band Decoder : …… Most ICOM, Yaesu, Kenwood, Elecraft K3, Ten-Tec

Drain Voltage : ……………… 50 V (when no RF drive)

Drain Current : ………………. 60 A max.

Input Impedance : …………….. 50 Ω (unbalanced)

Output Impedance : …………….. 50 Ω (unbalanced)

Final Transistor :……………..  THP2933 x 6 (MOS FET by Microsemi)

Circuit :……………………….. Class AB push-pull

Cooling Method : ……………….Forced Air Cooling

MPU :………………………….. PIC 18F8722

Multi-Meter :

  • Output Power:…..Pf 2.5 kW
  • Reflected Power:…..Pr 250W
  • Drain Voltage:…………Vd 60V
  • Drain Current:…………Id 80A

Input/Output Connectors : …………. UHF SO-239 with low loss Teflon insulator

AC Power : ………………………… AC 100V ~250V (wide range)

AC Consumption : …………………. 3 kVA max. when TX

Dimension : ……….. 370 x 145 x 422 mm (W x H x D) 14.6 x 5.7 x 16.6 inches

Weight : …………… Approx. 18 kgs. or 41 lbs.

Optional Items : …………….. Band data cable to radios

HL-2500FX TOKYO HY-POWER

Circuit Description

RF Amp

Driving RF signal transmitted from the transceiver is lead to the ATT/ Limitter board via T/R-Assy unit, where there is 3dB attenuator as well as RF limiter. These circuitry properly levels the magnitude of RF signal and also instantly shuts down the input to protect the amplifier.

HL-2500FX TOKYO HY-POWER

There is a three port splitter located in this board that sprits a driving signal equally into three components, which are then fed to final PA module.

PA module consists of three sets of wide band class AB1 linear amp. using THP2933 FET’s in the push-pull form. 500W is achieved per one basic amp. board. Then the three outputs from the PA module is sent to the combiner unit, where three 500W components are combined to become 1,500W.

Operating status of three PA’s are strictly monitored in the combiner stage with regard to heat balancing of respective amps.

Finally 1,500W of RF output is lead to LPF (low pass filter) unit, where harmonics and spurious signals are reduced to FCC rules. Filtered output signal is sent to T/R ASSY unit again and is lead to antenna terminal by way of antenna relay.

DC Power Supply

AC power is received at the IEC socket intake and passes the line filter. There are safety fuses on both lines. There are control power supply and FET drain power supply . Start up is usually made by turning on and off of control power supply. DC 12V, 24V and 100V are available when control power supply is turned on, and are always outputted once the POWER is turned on.

There are a magnet relay at primary side and DC ON/OFF function at secondary side. Depending on the operating condition, this power supply is turned on and off through the control circuit, and is provided in this power supply to meet IEC61000-3-2 harmonics regulation.

HL-2500FX TOKYO HY-POWER

Control Circuit

Control circuit performs various control using micro-processor PIC18F8722 chip. Also, basic interface meet the necessary rules and conditions using the specialized semiconductor devices.

Resources:

HL-2500FX User Manual

HL-2500FX Schematics

HL-2500FX Part List

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