This Mosfet Rf Amplifier will give you 800w output. The PA stage consists of four push-pull modules ,with splitter and combiner. each comprising a pair of IXYS 82N25P MOSFET devices. Each push pull is rated Po = 200W only. They have an "on resistance" of 0.35 Ohms , will dissipate about 500W each. V dss Drain Source Voltage 250 , Id Continuous Drain Current 82 A , C iss input Capacitance 4800pF,Output Capacitance 900pF .
produce 800w from 24V on 80 , 500w on 160 and 40 M .
The circuit work with four push-pull modules ,combiner and splitter The amp as shown needs 75W of drive for full output. The splitter wound on a small tubing or toroid transformer with about one turn pri. and two turns sec. The Combiner made from large ferrite tubes .
The Switching power supply is 24 Volts 100 A.
Mosfet Rf Amplfier
Bias should be set to
about 400 ma by adjusting the 10k Ohm pot carefully! Remember these FETs can
really draw some current!,
Schematic
a pair of this schematic with splitter and combiner...
See Youtube 800w... Click Here
Schematic
See Youtube 800w... Click Here
2 comments:
The MosFets amplifier should be mounted on heat sink which are then insulated from the main fan-cooled heat sink by suitable thermally conductive sheet.Thanks for sharing this post.
What happen if the Amplifier work with 48 volt ?
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