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66674Re: [softrock40] Re: Radiation from the RX Ensemble II / what about antenna transformer?

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  • Alan
    Jul 17, 2012
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    ----- Original Message -----
    Subject: Re: [softrock40] Re: Radiation from the RX Ensemble II / what about antenna transformer?


    > OOPS -- I made the LO transformer change, but now I'm not sure what the
    > second transformer change is required on the Ensemble II Rx.
    >

    Dave,

    Yes.

    The principle is that the grounded side should go to the same end of the primary and secondary. The two wires that come from the
    same hole in the binocular core.
    On the Ensemble RX input transformer the primary ground is the shell of the plug.
    The secondary is grounded to RF by C37.
    So one of the windings needs to be fitted crossed.

    In actual fact it can be either winding that may be crossed.
    So for one that is already assembled the one that looks easiest to change may be used.

    To repeat Tony.
    Ensemble RX and Ensemble RXII:- T1 and T2 need one winding crossed.
    Ensemble RXTX T6 needs one winding crossed.
    VHF Ensemble T1 needs one winding crossed.


    73 Alan G4ZFQ
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