[Milsurplus] How to Protect from Nearby Transmitter?

[David Stinson]

This is a Palomar LP-1 loop amplifier.  It works
well listening to Longwave.  The last time I
transmitted near it (75 mtrs), it blew the FETs.
The diodes didn't do the job.  How can I protect
the amplifier from a nearby 472 KC transmitter?
Use a fast MOSFET to short the loop on transmit?

73 OM DE Dave AB5S

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