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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 […]

Wiring schemes and kind of cable for connections vga monitor.

Wiring schemes and kind of cable for connections vga monitor. The connection of the R, G, B and sync signal shoul be made using 75 ohm coaxial cable. If you happen to use any other type of cable you will quite propably see a radical drop in picture quality (loss of details, shadowing etc.). A […]

Energy Management for portable charger schematic

Energy Management for portable charger schematic

Make mixer and a mic pre amp used tr BC177 or BC558

Make mixer and a mic pre amp used tr BC177 or BC558 This is the schematics of a simple low cost mic mixer that can be assembled from the components in your junk box. This two channel mike mixer is designed for handling high impedance dynamic microphones. Transistor Q1 can be any general purpose pnp […]

0v to 60V Power Supply Circuit

0v to 60V Power Supply Circuit using MJ2955, 78xx 0v to 60V Power Supply Circuit Power Supply Circuit +0 to 60V using MJ2955, 78xx

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