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  • December 4, 2016 at 1:22 pm #3816
    Ateyo
    Participant

    I thin anything in my unit is not okay. the cpm values seem to oscillate even the trend line. Look at the attachment. Other units in my region does not such a kind of oscillation. How can I investigate that?

    https://www.uradmonitor.com/?open=13000200

    Attachments:

    1. urad.png

    December 4, 2016 at 10:26 pm #3819
    uRADMonitor
    Keymaster

    This oscillation is not normal.

    I looked over the data and can advise you the following:
    https://raw.githubusercontent.com/radhoo/uradmonitor_kit1/master/pcb/1.2.105/circuit/kit1_105_sch.png

    1. change the compensation capacitor (C9)
    2. change the geiger tube

    December 8, 2016 at 7:17 am #3861
    Ateyo
    Participant

    1. change the compensation capacitor (C9)

    What do you mean exactly? Only replace with another one or another capacity?

    December 8, 2016 at 12:22 pm #3863
    uRADMonitor
    Keymaster

    First keep the value in the schematics. Next try a bigger value like 100pF. Hope this helps, keep me posted.

    January 2, 2017 at 7:22 am #3960
    Ateyo
    Participant

    A higher compensation capacitor (C9) seem to amplify this but not heal. So I also changed the tube. At first it seems to be better but it isnt away. I also changed the pwm frequency to 6500 to get a better duty.

    January 3, 2017 at 9:30 am #3968
    uRADMonitor
    Keymaster

    The inverter voltage / duty data looks ok.

    Please post a hires pic with your circuit so I can see the coil and the other components.

    January 4, 2017 at 7:56 pm #3971
    Ateyo
    Participant

    The pic

    January 4, 2017 at 8:26 pm #3972
    Ateyo
    Participant

    the pic

    January 5, 2017 at 9:22 pm #3973
    wanek
    Participant

    hello!

    maybe i’m missing something, but what is the reason that you soldered the transistors in such a strange position?
    do you still have the problem with that oscillation? i took a look now at your unit graph, and it seems normal to me…

    January 6, 2017 at 7:17 am #3974
    Ateyo
    Participant

    set the graph to weekly and you see the oscillation. You also see a unit close to me with half the values. It’s a unit with the same components like me but another firmware an older one.

    I don’t think that it is a issue from transistor soldering.

    Attachments:

    1. Bildschirmfoto-vom-2017-01-06-080751.png

    January 11, 2017 at 10:00 pm #3983
    uRADMonitor
    Keymaster

    New hex sent by mail.

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