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Posts tagged 2N2222,

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 […]

Radio digital ic circuit

Radio digital ic circuit IC tunes in to digital radio

stk Audio Amplifier scheme

stk Audio Amplifier scheme 30W Audio Amplifier Circuit using STK1030

PCB Solder Mask

PCB Solder Mask

4Way Audio Surround Active circuit

4Way Audio Surround Active circuit using LM1877N, 7812

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