The following article is taken from the AMA National Newsletter.
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This article is by Bob Angle from SAM 26.

UNUSED RADIO FEATURES

We had a mysterious crash at the field recently. Afterword we couldn't reconstruct the exact cause, but here's the consensus on what probably happened. After an engine flameout, the transmitter was handed to another flier and control was immediately lost. The ship wouldn't respond to up elevator. It nosed-in in a bad place, doing much damage.

The radio seemed to work afterward, but when the elevator dual rate switch was on low rate, pulling full up stick put in left elevator in a slightly down attitude. The dual rate feature hadn't been intended to be used, but the rate toggle was probably bumped to low when the transmitter exchange took place. If your transmitter has the dual rate feature and you're not using it (which should be "always" for most of us), then read the radio instructions and tune out all low rates, so that accidentally bumping a rate switch won't change anything.

from SAM 26 Newsletter
Bob Angel, editor
1001 Patterson Rd.
Santa Maria CA 93455