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Magical smoke out of QDX, two leftmost BS170 very hot


 

Hello,?

'fraid my QDX let out the magic smoke today.?

I had one of these rare moments when it would not transmit after changing band / frequency. I unplugged from both PC and power, plugged pwer back in and it started smoking and stinking immediately. Two leftmost BS17o get very hot and smoke.?
12V build, latest Firmware 1_10, being run at 11,3V - first thing I checked was if my downconvertar had gone nuts - no, it hasn't, it's outputting wonderful 11,3V, under load and without.?

Should changing the 4 BS170 (I have been so cautionary to stock some) fix the issue or should I look at something else before, lest I burn them again straight away??

73 de EA7KLK, Volker

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