Original 2N2/40 Schematic Diagrams
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Original 2N2/40 Schematic Diagrams
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| The "front-end" of the receiver showing the input filtering, r.f. amplifier, Rx double balanced mixer, and varactor tuned VFO. |
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| This is the remainder of the receiver, including the post mixer amplifier, variable crystal filter, i.f. amplifier, product detector, local oscillator, receiver muting, and audio amplifier. |
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| The transmit section, showing the local oscillator, Tx single balanced mixer, transmit r.f.amplifier, driver, final amplifier, and output lowpass filter. The final uses 3 parallel connected 2N2222As in metal cans. Good heatsinks are required. |
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| Additional small, but important, pieces of the transceiver design, which include the Rx/Tx driver, the receive T/R switch, power input circuitry, and the receive r.f. amplifier gain switch. |