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Re: Magical smoke out of QDX, two leftmost BS170 very hot


 

On 28/02/2024 17:54, Volker Kerkhoff wrote:
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?
Volker,

Remove the BS170s.
Test for 5 volts at the gate pads when in transmit. 0 volts receive.

If good replace BS170s.
Maybe consider a diode across L14, could protect against one failure mode.

73 Alan G4ZFQ

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