The RFpower LA1K5 is a solid-state 1200 watts 1.8 – 54MHz power amplifier. It uses a ruggedness 1800 watts 65 V LDMOS technology NXP’s MRFX1K80 RFpower device for reliability and high spectral purity and has an internal highly reliable, Power Factor Correction, low-noise switching power supply, in order to reduce the overall weight. At last, but not last, the switching power supply meet the severe European Rules about Energetic Efficiency.
The thermal design is very conservative due to a special 6 kg weight copper/aluminium heatsink. This, assisted by a sophisticated thermal management system, allow the channel temperature of the LDMOS device to remain within limits which should ensure extended life.
A major objective of the RF design has been to significantly exceed the RF spurious signal generation requirements of the European Rules (RED Directive) for amateur radio equipment. To this end the RFpower LA1K5 has more extensive filtering than is usual in HF amplifiers. An efficient internal ALC circuit contributes so that the RF output signal is even more clean.
While LDMOS RFpower Mosfets are amongst the most rugged RF power amplifier devices currently available, they are sensitive to RF overdrive. The RFpower LA1K5 has both extensive monitoring to minimise the risk of damage by overdrive and a conservatively designed input circuit.
The RFpower LA1K5 employs a full touch-screen control using a 800×480 pixel 5.0″ full colour TFT display module. A wide range of monitoring functions can be displayed with high precision, including RF output power, RF input power, Antenna VSWR, PA drain current, PA drain voltage, LDMOS temperature and more.
Band selection is fully automatic by RF-sense circuit. The presence of valid in-band signals is detected and will initiate switching automatically to that band. For a more high speed band selection, Kenwood CAT Command, Yaesu Band Data Input and Icom Band Voltage Input are included.
Overview and control of all important parameters via 5.0″ color 800×480 px touch screen module; no control buttons
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Frequency Coverage: 1.8 to 54 (70) MHz (all amateur frequencies WARC & 60m included – 70 MHz on request)
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Operation Mode: All modes
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Input Drive Power: 25 watts maximum
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Auto Band-change RF Sense Input: Yes (by internal frequency counter)
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Input circuit: Broadband, VSWR 1.2:1 maximum
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VSWR Output Protection: 2:1
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PA Output Power: 1200 watts
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IMD3: Better than -32dBc (-38 dB PEP)
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Harmonics Suppression: HF = better than -50dB VHF = better than -60dB
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RF Output Filters: 7-pole low-pass type, made using high-voltage mica (Cornell Dubilier) & porcelain (American Technical Ceramics) capacitors and oversized coils wound on T130 (Micrometals) iron powder toroid cores
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IN/OUT Impedance: 50 ohms unbalanced Amphenol™ SO-239 connectors
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RF POWER TRANSISTOR: 1800 watts MRFX1K80 NXP™ LDMOS MOSFETs
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Amplifier Circuitry: Push pull AB class
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ALC: 0 Vdc to -11 Vdc (adjustable)
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Cooling: Forced air
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Acoustic Noise Level: 58 dB(A) maximum
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RX/TX Switching Time: Adjustable
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RF Protections: High antenna VSWR, Wrong band, Input verdrive, Over temperature
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Power Supply Protections: Short circuit, Over current, Over voltage, Over temperature, Power ON soft-start circuit
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Power Supply Range: From 170 Vac to 260 Vac 50/60Hz continuous for full RF output power
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Standard Rules: According to EU Electromagnetic Compatibility Standard and EU Electrical Safety Standard – ROHS
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Dimensions: 35 x 40 x 17 cm – 14 x 16 x 7 in (W x D x H)
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Weight: 14 kg (30.8 lb)
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Warranty: 5-year
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Introductory Price: € 2.806,00 – http://www.rfpower.it
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