Re: QMX Receive suddenly stop working
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Howard, Checking the bias voltage to the mux usually provides a good test of 3253 health. It can be measured at a number of easily accessible points, such as any terminal of T401, or on C406. It should be approximately 2.5V relative to ground. Any reading that deviates significantly from that, up or down, is a strong indication of mux failure.
Good luck ! JZ
I am using 20m-80m model of QMX. It is self assembly. It is still transmitting and produce right power level.
Seems like I should check 3253 from you description. However I am not sure how to do so?
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