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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 […]

Noise Reduction

Tips eliminate audio Noise. NOISE Reduction I will give the reader some tips on how to eliminate the noise in electronic circuits, why it happened, and how to read Noise Reduction specifications. Usually does not make sense to not know, so it was expected that this paper will help those who are trying to make […]

consumer goods why arnt they repairable?

steve50 asked: many years ago as a tv man i could repair many tv’s in customers houses there were known brands and real wood cabinets some even came with circuit diagrams in the box. now they are all made in foreign lands no circuits and if a main part has gone its scrap time even […]

LM7812, LM7912 circuit

LM7812, LM7912 circuit for Power Supply Control LM7812 pinout

Electronic circuit system audio drivers

Electronic circuit system audio drivers system audio drivers

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