Your PBT imbalance problem is likely caused by
asymmetrical 2.4 KHz filters in the Corsair II.
This is a long known problem with the CSII, Omni V
and Omni VI's.
I have had similar experiences with all of the
many (!) Corsair II's I have owed over the years
along with an Omni V and Omni VI. L/O and IF stage
alignments will not improve this problem caused
the inconsistent performance and design of the
stock TT 2.4 KHz filters.
The remedy is to replace both 2.4 KHz stock
filters with INRAD 2.8 KHz filters in the 9 and 6
MHz IF stages and to make sure the the local ocs's
are adjusted as`perfectly as possible.
You will be rewarded with far improved SSB audio
fidelity and wonderful SSB TX audio.
What you are describing I experienced with all the
TT radios of this IF design that I have owned over
the years. The 100% fix is this filter swap.
Pricey but really worth it. Any easy swap out.
You can also install the 2.4 KHz filter board (9
MHz) with sockets to make future filter swapping
really easy. I think that Barry N1EU documented
that mod. (Check out his really neat CSII wiki
site at http://corsair.wikidot.com/corsair-9mhz)
I have a last production run Omni V and last
production run CSII that I have switched out these
filters and the results are super.
73 de N1LQ-Dave
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