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Schematic diagram for a broadband QRP SWR metering circuit and SSB TRANSCEIVER 80M / 40M boster filter IF Radio

A schematic diagram for a broadband QRP SWR metering circuit for use in a QRP antenna tuner. One could simply hold a momentary DPDT switch down and watch the LED while tuning the capacitors of the antenna tuner for minimum or zero light.

Make Electronics Schematic Diagram MJR7-Mk3 Mosfet Audio Power Amplifier 70W output power at 60v

MJR7-Mk3 Mosfet Audio Power Amplifier 70W output power at 60v The Electronics Schematic Diagram MJR7-Mk3 Mosfet MJR6 page includes distortion extracted using the nulling method with a speaker load and a music signal to demonstrate that these designs have no audible distortion in normal use. The MJR7 has even lower distortion, for example the 19kHz […]

RF preamp Circuits

RF preamp Circuits using CD4007. RF Preamp properly tune CD4007 Audio Preamplifier Circuits and Design Guidelines for Bipolar

Remote Control Transmitter circuit

Infrared Remote Control Transmitter circuit using LC7461M IC Infrared Remote Control Transmitter IC using LC7461M Functions 32 3 functions keys 13-bit custom codes Operating supply voltage range Vdd=1.8 to 3.6V Supply current at the standby mode Idd=1uA or less Double-press operation keys (no priority given) On-chip oscillator (ceramic resonator : connected externally) Features The custom […]

The LM555 Timer 1 part 8

The LM555 Timer part 8

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