开云体育

If the rig won't turn off, the question is, what is causing THAT to be the problem? Something must be wrong?already with the situation, for that to be the case. Until the radio is turning on and off properly I think it is prudent to run it at a lower voltage if possible.?

I have seen quite a few cases where there were shorts from the female pin header connector pins, to nearby SMD components. I think it will be worth adding to the build instructions, a step to cut 2mm off each pin of the connector just to reduce this probability.?

I don't know if this was the problem in your case; but SOMETHING is wrong, if it won't power down on a long left-knob press.?

I do not think removing power suddenly from the QMX should cause any issues. Here I do it routinely. Very often if I am doing hardware experiments (filters, etc) or tuning up a QMX, I do so with the LCD and the controls boards removed, so that I can easily access the LPF and BPF toroids. I have a little 1x2-pin male header in which I joined the pins at the short end, with a blob of solder. I just insert this into the 2x4-pin controls header at the appropriate point to effect a press of the left rotary button, to switch on. I commonly then just pull the banana plug out of the power supply, or unplug the 2.1mm power jack from the QMX. I have done this hundreds of times and never had any issues.?