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146MHz Amp Tests


    Cluster Activity

    Spots per uW band today:
    UK spotter or spotted only.

    Solar data:
    SFI
    68
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    6
    K-Index
    3
    Exp.K
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    Activity
    qui
    GMF
    qui
    Aurora?
    no

    My Weather

    Date:01/01/70 Time:01:00
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    UKHASnet

    After some chat with Charles i've made a plot of power curve of the combined RD06 and RD15 device...

    gnuradio was used to ramp the output amplitude of a cw signal from the DATV Express.
    A coupled output from the RD15 amp stage was fed into an rtlsdr dongle, the amplitude measured and plotted, the result is below.
    The power is swept from very low o/p up to 9Watts.

    Amplifier plot




    In GNUradio right or wrong i've used the function probe to feed back the sawtooth signal from a signal source to a variable which is the value of the multiply const block.

    GNURadio power sweep setup














    Last page added:25/03/00 18:32
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