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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 […]

Portable detector

Portable detector Kristal Checker – Krystal Detector circuit using BC107 Kristal Checker – Krystal Detector circuit using BC107 Portable detector R1 ………….. 39K ohm R2 ………….. 1K ohm R3 ………….. 100K ohm C1 ………….. 680pF C2 ………….. 150pF C3 ………….. 1K pF C4 ………….. 4,7K pF TR1 …………. BC107 TR2 …………. BC107 D1 ………….. 1N60 […]

Single Cell LED Driver using LT1932

Single Cell LED Driver circuit using LT1932

Nokia 1100 lcd interface with PIC18f1320p

Nokia 1100 lcd interface with PIC18f1320p

Making Light Dimmer Using remote

Making Light Dimmer Using remote

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