G8JNJ

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G8JNJ
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  • Any Ideas [AM BCB overload]

    Yes, unfortunately you have two massive AM broadcast signals on 760KHz and 800KHz.

    As a temporary measure try attenuating the input signal by about 10dB.

    A longer term fix is to build a notch, or high pass filter to reduce the level of the BC stations without reducing the level of other signals.

    Some notes on the subject can be found towards the top of this web page.

    https://www.g8jnj.net/softwaredefinedradio.htm

    Regards,

    Martin - G8JNJ
    KA7U
  • TDoA Successes

    I'm quite pleased with this one, especially as it's an HF signal and there are not that many suitably placed KiWi's.

    It's a Russian CIS-12 signal on 11175KHz.



    Regards,

    Martin - G8JNJ
    WA2ZKDKA7Ujks
  • TDoA Successes

    I'm quite pleased with this one, especially as it's an HF signal and there are not that many suitably placed KiWi's.

    It's a Russian CIS-12 signal on 11175KHz.



    Regards,

    Martin - G8JNJ
    WA2ZKDKA7Ujks
  • TDoA Successes

    I'm quite pleased with this one, especially as it's an HF signal and there are not that many suitably placed KiWi's.

    It's a Russian CIS-12 signal on 11175KHz.



    Regards,

    Martin - G8JNJ
    WA2ZKDKA7Ujks
  • Direction Finding and linking existing KiwiSDRs

    Hi John,

    Excellent and very timely :-)

    There is currently a problem with a military FSK signal in the 40m amateur band that folks have been trying to ID. I ran a TDoA on it this morning and was able to narrow down the likely transmitter site fairly accurately (given the number of KiWi's currently listed.

    So a big thanks to all concerned especially John, Christoph, linkz and others who have managed to make this work.

    I don't think I'm overstating it when I say that this is likely to be a real game changer, especially when trying to ID unknown or interfering signals and makes what would previously have been only within the capability of national regulators or the military available to everyone.

    This is truly ground breaking.

    Regards,

    Martin - G8JNJ
    WA2ZKD