INRAD did some experiments with a narrower roofing filter in the OMNI VI
and the improvements were not large. The OMNI VI has such a solid front
end that the roofing filter is apparently not a big deal. You can call
George up at INRAD and ask about it, he is usually happy to discuss his
thoughts.
Clark
WA3JPG
On Saturday, June 14, 2003, at 07:04 PM, Scott Johns wrote:
Reading the schematic, it looks like the omni6+ has a rather wide 2 pole
roofing filter (designed to accommodate FM, SSB, etc). Such a design
obviously compromises the receiver for us cw only folks.
Is anyone on the reflector familiar with an existing mod, or someone
familiar enough with the radio whom could design a mod, to replace the
standard wide roofing filter with a narrow one such that the mod would
be in harmony with the circuitry downstream.
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