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Posts tagged BF990A

BF990A circuit and application Receiver tube Radio

BF990A circuit and application Receiver tube Radio vcc 9v

stk ic

stk ic circuit using STK015 stk ic circuit using STK015 stk ic R1 …….. 10K R2 …….. 1K5 R3 …….. 47 R4 …….. 10 R5 …….. 220 C1 2 …… 1uF/50V C3 …….. 3.3uF/50V C4 …….. 47uF/25V C5 …….. 33uF/16V C6 …….. 47uF/10V C7 …….. 33uF/ 50V C8 …….. 1000uF/50V C9 …….. 473 IC …….. […]

50W AF power amplifier Using STK4036II.

50W AF power amplifier Using STK4036II 50W AF power amplifier Using STK4036II

Make mixer and a mic pre amp used tr BC177 or BC558

Make mixer and a mic pre amp used tr BC177 or BC558 This is the schematics of a simple low cost mic mixer that can be assembled from the components in your junk box. This two channel mike mixer is designed for handling high impedance dynamic microphones. Transistor Q1 can be any general purpose pnp […]

6v – 12v simple inverter circuit diagram

6v – 12v simple inverter circuit diagram using NE555 and TIP41, 42, 2N3904

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