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FM Radio Receiver circuit diagram using TDA7021T

FM Radio Receiver circuit diagram using TDA7021T Parts List: R1 = 8kO2 R2 = 10kO R3 = 390O C1,C3 = 10nF C2,C6,C9,C16 = 100nF C4 = 33pF C5 = 25pF trimmer (Murata type TZB4Z250AB10R00) C7,C10 = 1nF5 C8 = 820pF C11 = 1nF C12 = 68pF C13 = 220pF C14 = 47µF 10V (Nichicon UWX1A470MCL1GB […]

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 […]

Camera Circuit diagram

MicroController Camera Circuit diagram MicroController Camera Circuit diagram

Cell voltage converter circuit

Cell voltage converter using ZSCT15555, BAS16, FMMT3906, ZHCS750

Control Satellite Receiver

Control Satellite Receiver using TUA6100B6 Control Satellite Receiver using TUA6100B6

Making RF Switching for terror

When switching an antenna between a transmitter and receiver, the 1N914 or 1N4148 can still be used, but with decreasing success as the frequency rises. It is common practice in VHF transcievers to use a PN junction diode, but with a lightly doped “Intrinsic” region between the P and N layers. The diode is called […]

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