Re: QMX died in first test run
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After reading Hans? Article on SMPS Fail for Voltage jump, and seeing his findings about D108 failing all the time, I might have been victim of that effect, too:
/g/QRPLabs/message/106566 I increased Voltage on my Lab Power Supply before from 9-12V. Not in a sudden jump, but slowely while monitoring. But the effect was the same: D108 died and pulled 5V Line down to GND, protecting the rest of the circuit.... 73 Manuel; DL2MAN |
Manuel; DL2MAN