[Amps] Info on Mirage 6M 10/150 Amp?

[Joe Giacobello]

I recently had a Mirage 10W in, 150W out 6M brick amp in the shack.  
When I checked it out, it wasn't working.  It seemed that the RF from 
the exciter was feeding straight through to the output.  I assumed that 
the RF sensing antenna relay changeover circuitry was not working.  
However, I've since been told that the 6M amps have to be keyed from the 
exciter by grounding through the RCA jack on the rear and do not work by 
RF sensing.  My 2M and 440 MHz Mirage amps go to transmit by RF sensing 
or via the RCA jack.  Is the 6M unit different?  I'd appreciate any 
information on the issue.

73, Joe