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Posts tagged 水晶

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 […]

Electronic circuit diagram audio amplifier AN7143 15w

Electronic circuit diagram audio amplifier AN7143 15w

op amp preamp circuit

op amp preamp circuit op amp preamp circuit using KA2214 op amp preamp circuit op amp preamp circuit

CLEAR FLUID DETECTION with OPTICAL TECHNIQUE circuit

CLEAR FLUID DETECTION with OPTICAL TECHNIQUE circuit using 4013B, ZVNL110

Electronic circuit diagram audio amplifier AN7140 5w

Electronic circuit diagram audio amplifier AN7140 5w Electronic circuit diagram audio amplifier AN7140 5w

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