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AMPTEC LA4000 HF Power Amplifier

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AMPTEC LA4000 HF Power Amplifier, designed for use on all short wave amateur bands from 1.8 to 29.7 MHz , including WARC bands and all modes. It is equipped with a two pieces of ceramic tetrode FU728F.

Frequency coverage: Amateur Bands 1.8 – 29.7 MHz including WARC
Power output: 4000W in SSB and CW, 3000W in RTTY, AM and FM
Input Power: Usually 60 to 90W for full Output Power
Input Impedance: 50 Ohm, VSWR less than 1.5 : 1
Power Gain: 17 dB
Output Impedance: 50 Ohm unbalanced
Maximum Output SWR: 2:1
SWR protection: Automatic switching to STBY, when reflected Power is 350W or higher
Intermodulation distortion: 32dB below nominal output
Suppression of harmonics: less than -50 dBc
Tubes: 2x FU728F Ceramic tetrode
Cooler: Centrifugal blower + Axial blower

Transformers: 2 pcs of toroidal transformer 3kVA
Dimensions: 480mm*200mm*450mm Width * Height * Depth
Weight: 54 kg shipping weight about 69kg
Protection circuits: — VSWR too high
— Input power too high
— Anode current too high
— Grid current too high