Sunday, February 5, 2012

1500 Watt high power amplifier


Regarding the 1500 Watt high power amplifier is very nice to talk about single amplifier circuit is therefore not o be outdone by the class-A amplifiers. Power amplifier circuit that allows for use on large event that requires a variety of power or power from the amplifier. In reinforcement in block buffer and its driver transistors using high quality, but actually at the end of the transistor amplifier can be dtermined according to needs.







1500Watt power amplifier
1500 Watt high power amplifier
Component List :
R1,R8____________________10K
R2,R3____________________22R
R4_______________________150R
R6,R7____________________68R
R9_______________________500R
R10______________________1K
R11,R15__________________200R
R13,R38__________________100R
R14______________________15R
R16,R17__________________0,22R 2W
R18,R19__________________10R 5W
R21,R22__________________10K
PR1______________________1K
C1_______________________10uF 63V
C2_______________________220uF 63V
C3_______________________100p
C6_______________________100n 400V
C11______________________47uF 63V
L________________________10 Turns 0.8 in Diameter
Tr1,Tr2,Tr3,Tr5____________ MPSA92
 Tr4,Tr10,Tr11,Tr13_________MPSA42
Tr6______________________MJE340
Tr7______________________MJ802
Tr8______________________MJE350
Tr9______________________MJ4502
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Wednesday, February 1, 2012

5 Watts FM RF Amplifier


5 Watts FM RF Amplifier


This fm rf amplifier uses 2SC1971 transistor to provide 5 watts of output. Output matching is adjusted via the two 40pF trimmer capacitors likewise also to the input. Note that the emitter of this transistor is directly grounded on the heat sink and should have a good thermal transfer. Driving power of 100 to 200mW can be applied in order to provide 5watts of output. Use a dummy load to tune this amplifier and remember that the transistor is biased in Class C, sufficient filtering should be followed after the output to minimize all the harmonics. Use ground plane construction technique in the PCB lay-out for best result, the more the grounding the better. If you have hard time finding the 10uH rf choke, try to wind 1/2 meter of 0.2mm enamel wire over a 33K 1/2 watt resistor and solder the coil ends to the legs of the resistor.
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