Flex 6500 broken by static electricity

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Hi !
Our team is now in the expedition on North Pole. Yesterday we prepared a position sharply went heavy hail. Enough for 2 seconds and flex decreased sensitivity. There is no way to return to the mainland and send you to repair the radio. We had to open the radio and examine the generator and oscilloscope. We have found the item (IC73 on plate) in SC-70 package, which brought up the receiver chain to ground bus.

After removal of the defective item and reception sensitivity recovered. Can we at your own risk transfer radio transmission? Full repairs done when returning to the mainland.
Burnt element is - PE4259?
Tnx!
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Den

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Posted 3 years ago

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Steve - N5AC, VP Engineering / CTO

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Official Response
IC73 is not a PE4259, it is a TI ESD protection diode on the receive input. You can operate without this part, but it protects more expensive parts further down the line that are more expensive. There is still one more of these before you get to the ADC. I would probably operate without it, but try to protect the front end from any further ESD events.