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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 […]

5 DOT DUAL LED LEVEL METER DRIVER

5 DOT DUAL LED LEVEL METER DRIVER using KA2284 / KA2285 5 DOT DUAL LED LEVEL METER DRIVER using KA2284 / KA2285 5 DOT DUAL LED LEVEL METER DRIVER The KA2284 / KA2285 are a monolithic integrated circuits designed for 5-dot LED level meter drivers with a built-in rectifying amplifier, it is suitable for AC […]

Audio Amplifier + TONE CONTROL Circuit

Audio Amplifier + TONE CONTROL Circuit using NE5532, LM1875T / TDA2050

Low Battery Disconnect

Low Battery Disconnect and Memory Backup Circuit in the ADM666A

Car Speaker Installation

Car Speaker Installation Schematic Audio Car Hyundai Atoz Car Speaker Installation The Install Doctor has gathered common car radio wiring and car stereo wiring information for the most popular automakers and placed this information Schematic Audio Car Hyundai Atoz How to install your car speakers?

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