[Orion] EN keying failure

[John Fulton]

The full break in keying circuit on my Orion II makes a weak clicking sound
upon attempt to key it.  When connected to a Centurion that arced, the O2
quit.  The standard Amp Key circuit still works.  We tired master resets and
no change.  Everything else works fine.  Just the EN circuit is broken.  Has
anyone else had this experience.  The Centruion is back from service and
working fine in the Amp Key circuit.