At 08:09 AM 6/16/03 -0700, you wrote:
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.
What frequency is the OMNI 6+'s first IF? On many general coverage radios,
the first IF is up in the lower VHF region, apparently to reduce spurious
responses. I talked with George at some length at Dayton this year, and
her indicated this is a big problem with fitting a narrower roofing filter
to some radios, such as the Yaesu Mark 5. It's not easy to build a narrow
crystal filter at 70 MHz, I gather.
73, Pete N4ZR
The World HF Contest Station Database was updated 9 May 03.
Are you current? www.pvrc.org/wcsd/wcsdsearch.htm
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