[TenTec] cascaded filters was Omni V audio

[ROBERT STEPHENS]

Between reading QST articles and reading threads on this list, I've become an appliance operator with a little bit of knowledge. Of course, a little bit of knowledge can be dangerous <g>
 
As I understand it , in a rig like the Omni V or VI,  filters in the upper and lower IF can be combined (cascaded) to produce a steeper filter. Thus , two cascaded 2.4 filters at 6.3 and 9 MHz will be sharper than one 2.4 filter at 6.3 alone. On the other hand, when there is no QRM on the band, the single 2.4 filter at 6.3 will sound more pleasant than the 2 cascaded filters so it is best to be able to  bypass the cascade and use the filters one at a time when conditions warrant.
 
I believe that the Omni V/VI/Paragon rigs have 3 optional slots for filters at 9 MHz and 2 optional slots for filters at 6.3 MHz and 1 standard hard wired 2.4 MHz  filter hard wired in at 6.3 MHz.
 
If  I bought an Omni  (or a Paragon) and wanted the best, fullest ragchew audio possible while also having good QRM fighting potential, what would be a good combination of filters?
 
perhaps:

 
9 MHz:     2.8., 2.4,  and 1.8     ?
6.3 MHz   2.4, 1.8,   and 500     ?
 
would the following combinations be possible: 

 
2.8 only (2nd filter bypassed) for best audio

2.8 plus 2.4 for good audio but a little sharper
2.4 only for slightly sharper

2.4 plus 2.4 for sharper

1.8 plus 1.8 for sharpest ssb 

1.8 plus 500 for casual cw

 
tnx & 73
 
 
 
 
 
 
.--- Bob Stephens,  KB1CIW--- bstephens1@mindspring.com
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