Klik ....800w Mosfet Rf Amplifier
anything about rf power amplifier using Mosfets . bipolar transistor . tube . etc
Wednesday, July 29, 2015
Friday, July 24, 2015
Monday, May 25, 2015
RF Amplifier For QRP
Rf Amplifier For QRP
Eliza Sukiman. ( YB0BAJ )
This Rf AmplfierFor QPR has made from low
price Mosfets . The MosFets are WO12L54F or any mosfet like IRF250,IRF450
can use for these .
The circuit is a Push Pull with 2 pcs and two band Low pass Filter for 3,5 Mhz and 7 Mhz.
The Rf Amplifier For QRP as shown needs 1W only of drive for full output.
The circuit is a Push Pull with 2 pcs and two band Low pass Filter for 3,5 Mhz and 7 Mhz.
The Rf Amplifier For QRP as shown needs 1W only of drive for full output.
The input
transformer T1 is wound on a small tubing transformer with about one turn pri.
and three turns sec. The thermal sensor contact with the heat sink and well
decoupled to prevent Rf pick up .The output transformer uses large
ferrite tubes . The primary is one turn of tubing transformer and the secondary
is 3 turns of thinner multi strand stuff .
The power supply
for this Rf Amplifier doesn't need regulating and 12v
enought for full power output 50w
The standing
current should be set to about 200 ma by adjusting the 10k Ohm pot . you can
see . .Schematic
Monday, January 11, 2010
SDR Transceiver
SDR ...Software Defined Radio
Eliza SukimanYB0BAJ Indonesian Amateur Radio Organization
Welcome to the exciting world of software defined radio
This amplifier was designed to improve an existing receiver by replacing the original r.f. stage. The circuit utilizes a Low Noise Rf Amplifier , has a dynamic range of 100 dB , and exhibit low intermodulation distortion.
Incorporation of the Low Noise Rf Amplifier into an existing receiver obviously varies, depending on the receiver, and can not be discussed in detail but must be left to the individual construction
Incorporation of the Low Noise Rf Amplifier into an existing receiver obviously varies, depending on the receiver, and can not be discussed in detail but must be left to the individual construction
next... SDR tranceiver all band with 100w output
Monday, April 27, 2009
800w Mosfet Rf Linear Amplifier using IXYS IREX
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
a pair of this schematic with splitter and combiner...
See Youtube 800w... Click Here
Monday, December 29, 2008
1kw Rf Amplifier with Low Priced Mosfet
Eliza Sukiman
This is my 1kw Mosfet Rf Amplifier. The MosFets are IRF 450 . They have an "on resistance" of 0.31 Ohms , will dissipate about 190W each. Vdss Drain Source Voltage 500 , Id Continuous Drain Current 14 A , Ciss input Capacitance 2000pF,Output Capacitance 300pF I have used them in my base station and they produce a good 1000w from 70V on 80 , 600w on 160 and 40 M . see . . . schematic
YB 0 BAJ Indonesian Amateur Radio Station
This is my 1kw Mosfet Rf Amplifier. The MosFets are IRF 450 . They have an "on resistance" of 0.31 Ohms , will dissipate about 190W each. Vdss Drain Source Voltage 500 , Id Continuous Drain Current 14 A , Ciss input Capacitance 2000pF,Output Capacitance 300pF I have used them in my base station and they produce a good 1000w from 70V on 80 , 600w on 160 and 40 M . see . . . schematic
any low priced mosfet you must try .... 73.
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