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Circuit diagram 75 Meter QRP SSB Transceiver

The 75 Meter QRP SSB Transceiver Theory of Operation 6-30-03 In general, the transceiver switches the 4-element 1500 ohm xtal BPF ends between the inputs and outputs of the two SA602s to reverse the signal flow for R/T operation. Since no IF amplifier is used in the design, 20 dB of additional receiver gain is […]

Power Supply Control

Power Supply Control using BC549, BC559, BD139

LM555 circuit Pulse Detector part 6

LM555 circuit Pulse Detector part 6

Free DipTrace PCB design software application

DipTrace is an advanced PCB design software application that consists of 4 modules: PCB Layout with efficient auto-router, Schematic Capture, Component and Pattern Editors that allow you to design your own component libraries. Besides being very easy-to-use, which is rare for a PCB design tool, this software possesses a very intuitive user interface and many […]

Electronic circuit diagram audio amplifier AN7117 0,50w

Electronic circuit diagram audio amplifier AN7117 0,50w

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