At 8/3/2004 10:47 AM, you wrote:
>It appears you have a good handle on it. The only thing I would suggest
>trying is to put a Micor or MASTR II set of helicals on the front end of
>your receivers. That would give you much more selectivity and could get
>rid of the desense. Of course, being 220 it would have to be a modified
>set.
If filtering is added, I'd suggest one or two pass cavity filters instead
of helicals. Helicals have good selectivity, but at the cost of high
loss. Typical G.E. VHF helical resonators have 5-6 dB loss at 2 meters
(don't know how lossy the Micor helicals are; wonder if anyone has directly
measured at set?). A pass cavity OTOH is around 0.5-2 dB depending on the
loops used.
Bob NO6B
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