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Old kc901h-factory calibration missing

By Igor •  2017-11-26 17:32:41 •  205 clicks
Hello! I've successfully used kc901h in my hobby for two years. But recently, a malfunction occurred-the factory calibration was lost. Only user sizing is working, but it is very uncomfortable in this mode ... How do I restore my factory calibration? Please help me. I'll be very grateful.


3 Reply | until2018-03-17 20:43Add a reply
    VK3NH  2017-12-09#1 -Reply

    Genuine post

    qlc  2017-12-07#2 -Reply

    I've got the same issue recently. Both is S11 and S21 modes.
    What is the "source" output amplifier transistor type? Looks like it is out of work.

    VK3NH  2017-11-28#3 -Reply


    This comment should put your question back to the top of the list above the rubbish
    cheers Noel


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