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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 […]

How do I install a car stereo audio?

How do I install a car stereo audio? Here wiring diagram for the multimedia on your car How do I install a car stereo audio? How do I install a car stereo audio? Here wiring diagram for the multimedia on your car, to work on multimedia (DVD, CD, TAPE, RADIO) in order to perfect In […]

home stereo amplifier

home stereo amplifier using LA4261

Power Supply and Mute Control Circuit

Power Supply and Mute Control Circuit using 7815 and 7915 , BC549 , Relay

Delay to switch protector circuit

Delay to switch protector circuit using SL100, BC108

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