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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 […]

tube Amplifier circuit

tube Amplifier circuit using 12AT7, EL84

Tips on how to repair electronic devices

Tips on how to repair electronic devices Before the repair of electronic devices we must first know the blocks of the parts, it is very important because by knowing the block, we can easily determine and track the defective component, such as how to find a block of television is a machine we must know […]

Is it possible to create an “all-penetrating EYEBEAM”?

SorrY asked: just by looking at an object and querying a database it produces a list of attributes of that object in your “inside window” of the eye – that is an artificial eye transplant that associates existing attributes with defined custom attributes that you can add and delete over time – for example if […]

DC power converter

DC power converter 12V DC to 120V DC The most obvious approach would be to make a DC power converter 12V DC to 120V DC, output at 50 or 60 Hz, but this requires a rather large and heavy transformer. So it’s better to use a high frequency, at least 25kHz, so a very small […]

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