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  • [G4AKC] Bicycle Mobile low power tests 22nd March 2022.

    From G4AKC via rec.radio.amateur.moderat@21:1/5 to All on Sat Mar 26 12:55:02 2022
    XPost: rec.radio.amateur.moderated, rec.radio.amateur.equipment, uk.radio.amateur
    XPost: free.uk.amateur-radio

    G4AKC - HF Pedestrian and Bicycle Mobile

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    Bicycle Mobile low power tests 22nd March 2022.

    Posted: 25 Mar 2022 09:39 AM PDT https://www.g4akc.co.uk/bicycle-mobile-low-power-tests/?utm_source=rss&utm_medium=rss&utm_campaign=bicycle-mobile-low-power-tests




    VK7VZ/P/2




    As recorded by Robert on 22nd March 2022 at 08:00 UTC on 20m ssb (his clock date/time is wrong) during our QSO on 14.156.




    Dave, G4AKC


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    QRP portable activity

    Posted: 25 Mar 2022 04:37 AM PDT https://www.g4akc.co.uk/qrp-portable-activity/?utm_source=rss&utm_medium=rss&utm_campaign=qrp-portable-activity

























    As heard by VK7ROY







    ///////////////////////////////////////////
    New QRP Portable

    Posted: 25 Mar 2022 03:41 AM PDT https://www.g4akc.co.uk/new-qrp-portable/?utm_source=rss&utm_medium=rss&utm_campaign=new-qrp-portable



    I have now completed my new QRP portable set up using a Yaesu FT818 in a
    metal flight case.



    Interior of case all equipment floating on foam




    I made the SOTA speech processor kit and added it to enhance the audio, as
    the FT818 is a bit lacking in transmit audio punch, however I had to screen
    the interior of the module in aluminium tape and return earth back to the
    radio chassis to prevent RF feedback issues, this has cured the RF pick up issues.



    SOTA beams speech processor




    I am using a 3,000mAh LIPO battery to power the radio as the internal nicad batteries that come with the radio are not sufficient for any reasonable duration of use.




    Lipo 3,000 mAh battery





    The antenna is a homemade loaded vertical that is connected to the radio
    via a right angled BNC connector on the side of the metal case.



    BNC side case connector for antenna




    I am using a homemade ground tuning unit to optimise the ground coupling
    down to true earth.



    Toroidal Ground Tuning Unit




    The Antennas are 8ft long and I have made a set of base loaded mono band antenna for 20,17,15 and 10m and additionally a multiband antenna with
    tapping points for 7-30Mhz.



    Case in operation over the beach



    Home made multiband tapped antenna (with flexible support line)




    I have fitted Terry Clips to hold the Antennas in place whilst in transportation.



    Terry clips to transport the antenna




    The radio is fitted with side rails and fold away front feet and can be operated as a stand alone set up out of the case.



    FT818 with side rails




    I have also modified a soft case for the purposes of walking and climbing hills.



    Soft padded backpack interior



    Soft backpack ready for operating




    Dave G4AKC

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