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EME in 2012



    Cluster Activity

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

    Solar data:
    SFI
    76
    A-Index
    6
    K-Index
    2
    Exp.K
    2
    Sunspots
    26
    Activity
    qui
    GMF
    qui
    Aurora?
    no

    My Weather

    Date:18/11/17 Time:17:25
    Temp:3C
    Wind Speed:2.5mph
    Wind Dir:202deg
    Pressure:1017.29mB
    Humidity:118%
    Dew Point:6.6C
    UKHASnet
    EME in 2012

    Improvements October 2012

    A new tracking system with the F1EHN controller board and US Digital Encoders has been installed giving a very precise indication of where I am pointing, this is much better!

    G4DDK 23cm lna has been tested on two analysers... measured 0.2dB and 0.3dB NF so in the right ball park!

    LNA is now fitted to my newly constructed 1420MHz feed, performing much better than the original 1296MHz septum feed.......

    Sun noise measurements now done with a Realtek RTL2832/E4000 dongle (AGC disabled) results below:

    Solar Flux = 124
    Sun Noise = 11.2dB
    Moon Noise = just under 0.1dB, The first time i have been able to measure any moon noise!

    VK3UM EME Calculator predicts 13.7dB Sun noise for SF124.





    More Improvements November 2012

    I have now built another feed in replacement to the square septum feed due to its low performance for some unknown reason!

    This is the VE4MA/W2IMU round feed with polarising screws and choke ring...

    Last measurement with some tweaking of feed position is:

    Solar Flux = 111
    Sun Noise = 11.5dB

    Things are looking better! Reception of ON0EME seems much better now compared to the septum feed and Sun noise has made a big leap! the isolation is not as good on this feed so some slight adjustment maybe needed before i connect the TX side but hopefully i can get that done soon.

    This weekend 24/45th Nov i heard many stations on 23cm via the moon on CW/JT65

    on CW:

    I5MPK
    I1NDP
    OK1CS
    G5WQ - hard to copy with my poor cw skills..hi



    JT65C:

    OK1CS -13
    SP3XBO -14
    I1NDP -5
    G4CCH -8
    YO2BCT -18
    EA1RJ -23
    PY2BS -7
    ZS5Y -22
    G5WQ -19
    W3HMS -18



    Some audio clips:

    I1NDP(CW)
    I1NDP(SSB)
    I5MPK(CW)
    G4CCH(CW)
    ON0EME Moon Beacon!
    LX1DB(SSB)



    New feed Nov 2012

    New 23cm Feed













    Last page added:16/08/17 15:45
    M0DTS.co.uk