!If the coupler failed and the transmitter still tried to transmit with a badly matched antenna, it is likely that the final amplifier stage, the PA, got damaged as well by the reflected HF energy."
Yeah and if they tried the wrong bits that would have well and truly f
d it up.
SE Asia is a wunnerful place for making counterfeit parts. Save a $ costs you $1000. That simple. All these little numbers and date stamps on the bits are there for a reason...I often wonder how many of these are found after an accident by the inspectors...fake parts I mean. They technically did not cause an accident but WHO really knows?