1) To seal up the antennae hole, use those waxy earplugs-- two of them work great
2) Glad press and seal wrap is a great alternative to a balloon to waterproof a receiver-- I had a boat underwater for 3+ hours and the unit stayed dry and functional.
3) My nimh packs got water in them-- I split open the plastic wrap to let them air out, and used the press and seal wrap plus a bit of electrical tape to reseal them. Nice benefit is you can take off the wrap to let them dry if they get wet again.
-Chief
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