| Thanks to everyone who contributed to the discussion.  Ron caught the 
decisive clue.  In a nutshell, my other radio is a Kenwood, and something 
in the TR code is mixing the two data streams, so that some Kenwood stuff 
was going to the Mark 5 and confusing it -- poor baby.
When I deleted the Kenwood lines from my config file, leaving the Yaesu as 
Radio Two, it didn't work at all.  But when I renamed it Radio One, the 
only radio being controlled, the hex sequences all work perfectly.
This is going to add some really neat capabilities to the TR/Mark 5 
combination, once the bug is swatted.
73, Pete N4ZR
Sometimes a tower is just a tower
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