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23cm Tx


    Cluster Activity

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

    Solar data:
    SFI
    71
    A-Index
    2
    K-Index
    1
    Exp.K
    0
    Sunspots
    12
    Activity
    qui
    GMF
    qui
    Aurora?
    no

    My Weather

    Date:01/01/70 Time:00:00
    Temp:C
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    Humidity:%
    Dew Point:-20C
    UKHASnet

    One of my past projects was the 23cm ATV transceiver project. It ended up being a bit too big for the shelf and was never happy with the look of it so i decided to go back to basics and have separate TX/RX...

    Transmitter is a Worthing 1W Transmitter, Amplifier is Mitsubishi 57762 module on the back panel heatsinked + Fan

    Change-over Relay is CX-120 and is mounted on the rear panel to connect up to receiver.

    Receiver is a Bennetts 2026L (Zeta 1000) (not shown in photos)

    Here are the photos..

    23cm ATV Tx



    The layout is very similar to the old version but with a prescaler and frequency counter on the front and rx output on the rear.

    The frequency counter is based on this design by OM3CPH using PIC16F84 and MB506 prescaler, the code had to be modified slightly to use the pre-scaler divide ratio. Eventually i will make a link from the satellite receiver tuner local osc to this counter to be able to display the rx frequency also, this needs some modifications for the code to add the 70MHz IF of the receiver to give the correct readout.

    Inside 1


    Inside 2

















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