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FM Power Amplifier BLY87A, BLY89A, KT920A, KT925B
A very simple fm power amplifier which can deliver 4W rf power with 12V power supply and BLY87A or KT920A and 20W with BLY89A or KT925B.
If you use BLY87A or KT920A the input power must be 0.5W and 4W if you use BLY89A or KT925B. This fm power amplifier is designed to work on [...]
Rf 15W - 30W power amplifier KT922, KT930, KT934
This amplifier ensure the power you need for a small transmitter.
Depending of input power, power supply and transistor, this amplifier can boost from 15W up to 30W.
The most important components : 7805, 1N4001 diodes mounted in series, 120 ohm / 2W resistor and 1N4145 diodes.
The setup : trim P (220 ohm ) untill you obtain [...]
