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Archives for February, 2010

Making 15W FM RF Amplifier using 2SC253

This is a FM RF amplifier which build based on RF Power Transistor 2SC2539. 2SC2539 is a silicon NPN epitaxial planar type transistor designed for RF power amplifiers in VHF band mobile radio applications. L1: 2T Coil diameter:4mm L2: in series 6pcs Toroidal ring L3: 4T Coil diameter:10mm L1: 3T Coil diameter:10mm

Electronic circuit diagram audio amplifier AN7125 13w

Electronic circuit diagram audio amplifier AN7125 13w

power supply using A723

power supply using A723, Tube

Electronic circuit diagram audio amplifier AN7118S 0,35w

Electronic circuit diagram audio amplifier AN7118S 0,35w

Power adapter circuit

Power adapter circuit Power adapter circuit +9V using TIP31, BC182 Power adapter circuit Power adapter circuit

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