Hem SAQ Forum SAQ Technical Discussions Wiring diagram of the ”synchronous detector” at the receiving station for SAQ?

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    Juergen Urbig
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    Hallo everybody,
    In ”The Book of Radio”, Charles William Taussig, 1922, pages 312-327
    I found the following technical description of the receiving equipment for SAQ used in Riverhead, Long Island:

    ”The incoming oscillations are received in circuits corresponding to their respective wave lengths and then, by a complex system of ”traps,” are purified of all unwanted signals, including most of the static disturbances. They are then passed through three stages of radio-frequency amplification, then rectified by means of a special two-element vacuum tube which is part of what is called a ”synchronous detector”, and finally through two stages of audio-frequency amplification”

    Now my question:
    Does anybody know the wiring diagram of the ”synchronous detector”? You can send either a file or a link to ma my email address
    dl4jwu@darc.de.

    Many thanks in advance
    Juergen (DL4JWU)

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