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ATV using LED Tx


    Cluster Activity

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

    Solar data:
    SFI
    68
    A-Index
    6
    K-Index
    3
    Exp.K
    0
    Sunspots
    0
    Activity
    qui
    GMF
    qui
    Aurora?
    no

    My Weather

    Date:01/01/70 Time:01:00
    Temp:C
    Wind Speed:0mph
    Wind Dir:deg
    Pressure:0mB
    Humidity:%
    Dew Point:-20C
    UKHASnet

    I modified the German designed Laser TX to drive a 1W Golden Dragon LED.

    Managed to receive my own transmission at a portable site 11km away using the German designed Photodiode Rx at 20MHz, results were not that good, sync to weak lock of the video signal.

    This time i used a photomultiplier tube as the receiver and it worked much better!
    The TX alignment was not optimised in beam heading because i set this before going /p!

    Tx 20MHz carrier FM ATV to 1W LED and 30cm Fresnel lens.
    Rx Photomultiplier tube into into a 20 > 70MHz converter, then into a Zeta 1000L sat receiver.


    Optical ATV with LEDTx

















    Last page added:25/03/00 18:32
    M0DTS.co.uk