I had to do this with my Henry linear, but I used an external relay box (and used a "solid-state" relay to minimize noise/maximize life, switch faster). Unfortunately can attest that if you don't do this, you can possibly damage the master "T/R" relay on the REG board that controls which changes all the circuitry inside the rig between the two signal paths.
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-Mat Breton, N8TW
Mat Breton N8TW