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Posts tagged BS170,

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 […]

Mini Microphone circuit using BC109C

Mini Microphone circuit using BC109C

LM555 Electronics Schematic Diagram Reversed Trigger Input Control Of 555 Timers part 36

LM555 Electronics Schematic Diagram Reversed Trigger Input Control Of 555 Timers part 36

Audio Doorphone Intercom Circuits using 4093 and 4066

Audio Doorphone Intercom Circuits using 4093 and 4066 Audio Doorphone Intercom Circuits using 4093 and 4066

Power Ampli Circuit using uPC1188H

Power Ampli Circuit using uPC1188H, 2SC945 Although the amp sounds great 20 W Audio Power Amplifier uPC1188H

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