How To Measure Ferrite Inductor For 1kw Mosfet Rf Amplifier
Eliza Sukiman
Link :
Thursday, August 19, 2021
How To Measure Ferrite Inductor For 1kw Mosfet Rf Amplifier
Tutorial Setting Bias 1kw Mosfet Rf Amplifier
Tutorial Setting Bias 1kw Mosfet Rf Amplifier
Eliza Sukiman
Wednesday, January 13, 2021
300 W PEP with BLF177(1.6 ... 28 MHz)
300 W PEP with 2 MOS transistors BLF177(1.6 ... 28 MHz)
The BLF177 is an RF Power MOS transistor
for the HF and VHF range in a 4 leads flange SOT121 encapsulation. For the
frequency range 1.6 - 28 MHz a wideband push-pull power amplifier has been
developed with 2 BLF177 having an output power of 300 W PEP at an
intermodulation distortion level below -30 dB.
The transistors operate in class-AB at
VDS = 50 V and a quiescent current of 0.5 A each.
CONSTRUCTION OF THE AMPLIFIER
r = 4.5. The position of the components
is on one side and the other side serves as a groundplane. Connections to the
groundplane have been made with rivets and with straps under the source leads
and at the edges of the PC-board on the in- and output side.eFor the printed circuit board double Cu-clad epoxy fibre glass has been
used with a thickness of 1/16” and
The printed circuit board has been
attached to a solid copper plate which functions as a heatsink.
Around the position of both transistors
a tube has been soldered in the copper plate to controle the temperature by
means of a watercooling system. For a good thermal contact between heatsink and
transistors heatsink compound has been used.
YB0BAJ ...jan13,2021
Low Priced Mosfet Demo
See demo....300w Click Here
See demo ....600w Click Here
See demo .... 800w Click Here
See demo .... 1Kw Click Here
Tuesday, June 16, 2020
Thursday, August 23, 2018
Interface for Android
Interface for Android and your Transceiver
you can qso with RTTY , PSK31 , JT65 , FT8 ....
Thursday, May 3, 2018
300w for "Nyolder Bareng Orlok Jakarta Timur"
YB0BAJ Indonesia Amateur Radio Station
Eliza Sukiman
300w for "Nyolder Bareng Orlok Jakarta Timur"
This project for " Nyolder Bareng Orlok Jakarta Timur" is 300w
made of IRF 450 .
This
300w Linear Rf Amplifier is very simple, easy and cheap. Hope this
schematic diagram can help you to make it .
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
See Youtube 800w... Click Here
Monday, December 29, 2008
1kw Rf Amplifier with Low Priced Mosfet
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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.
Tuesday, June 17, 2008
600w Mosfet Rf Linear Amplifier with APT5020BN
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Eliza Sukiman
YB 0 BAJ Indonesian Amateur Radio Station
This is my base station of MosFet Rf Amplifier. The MosFets are APT5020BN ,I have used them in my base station and they produce a good 600w from 36V on 160 and 80,and 400w on 7 Mhz. , I've had 600w out of four at 36V on 160 with a one turn primary / four secondary on the output transformer. (Tubing Transformer).
The circuit is basically the same but this is two devices with combiner on each side of the push-pull. The golden rule is to use a fet capable of withstanding three times your maximum supply voltage
Schematic.
See Youtube 600w ... Click Here
New power-MosFets coming out every week or so, look for ones with a low Rds-on and high power dissipation. The main drawback is the high gate capacitance, several thousand pF, which makes them hard to drive above 7MHz. Check out IRF , IXYS and APT ( FET manufacturers)
Tuesday, May 27, 2008
300w Rf Amplifier with low priced Mosfet
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Eliza SukimanYB0BAJ Indonesian Amateur Radio station
I have read Rf Amplifier Circuit using mosfets on the ARRL Handbook 2002. The amplifier used a pair of Motorola IRF510 transistors to generate 5 or 6 watts of peak envelope power from a 48V supply and operated within the frequency spectrum of 1.8 to 28 MHz.
It might be of further interest to describe a higher power version of a linear amplifier which I had reason to design, using two IRFP 150 ,WO12L54F , or other . The Circuit can deliver a power off 250w at 1.8 MHz, 300w at 3.5 MHz and 200w at 7 MHz with 36 v . The IRF150 transistors used the International Rectifier (IR) .
very simple and useful for Amateur Radio... hope you enjoy...73
Schematic
Schematic
See Youtube 300w ... Click Here
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