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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 […]

Telephone Systems

Audio speakers circuit board from Telephones using IC BA8024, ML8204 Audio speakers systems Circuit board for Telephone Systems

100 watt amplifier

100 watt amplifier 100 watt amplifier using 6P44S 6P45S 100 watt amplifier using 6P44S 6P45S

Audio Selector Circuit

Audio Selector Circuit

Power adapter circuit

Power adapter circuit Power adapter circuit +9V using TIP31, BC182 Power adapter circuit Power adapter circuit

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