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 < 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:  <-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 
About shipping
We usually by DHL, FedDx International Economy(will take 3-4 weeks) and others.