Ernie, are you able to measure the rf in, LO and rf out at Q9? Did you see
something that led you to suspect Q9?
A problem at Q9 could definitely cause the deafness.
On Sat, Mar 24, 2012 at 8:11 PM, k2ep <firstname.lastname@example.org> wrote:
> 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
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