[TenTec] A hard of hearing Omni 6+

[K2EP]

My Omni 6+ has gone hard of hearing.  The signal loss has been traced to the pbt board. When I inject a 9mhz signal to the input of the board, I see about a 6 s unit difference between it and a good one.  We have swapped out the 2.4khz filter with no change.  We have also done the bpt adjustments and peaked the 3 output coils.  I'm suspecting Q9, the second mixer maybe the problem.  Anybody have any experience with this board?

 

Tnx,  Ernie K2EP