Hello,
Sorry for spamming -? trying to simplify these RX chain check and by the way - interested in this topic...
Quick check of Q10 and Q30 might be done by measuring voltage drop on R14 and R34 respectively.
Voltage drop on R14 and R34 is around 4.2V - 4.43V which gives 19mA-20mA current of Q10/Q30 transistors (with assumption of negligible base current of next amplifier, polarization branch etc).
Anyway, I am suspecting Q10 as this is first transistor of RX path - first to hit from antenna / TX path (in case of last relay failure ??!!). Of course might be wrong...
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Regards
Tomasz
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tomekdm sp7etd