In my own careful experiments with the OMNI-C vs the TS-440 (ladder vs
ceramic followed by monolithic lattice filters) the static levels are
the same for the same level of sensitivity. If I cut back the RF gain
on the 440 to the point where they were about equal, the signals jumped
out of the noise about equal. The OMNI-C has less gain on the lower
bands and automatically sounds quieter but retains enough gain to work
fine under most conditions. The time where the ladder filter can help
out is when there is heavy static and you try to copy a weak CW signal
between crashes. I noticed a very small difference in the "ringing"
characteristics of the rigs to my ears, I could copy just a tiny bit
better on the OMNI-C in heavy static when the CW signal had enough
strength to come through. When the signal was really weak and I had to
use a lot of filtering, the 440 would win, but the fatigue factor in
listening was worse.
The OMNI-C was a neat rig, so well done for its time.
Clark
WA3JPG
On Thursday, February 19, 2004, at 09:09 AM, Mike Hyder --N4NT-- wrote:
Perhaps someone can explain why it is so but I've seen much discussion
about
the superiority of the Ten-Tec 'crystal ladder' filters over the
'crystal
lattice' filters used by other manufacturers. From what I've read, the
difference in those filter types may help account for the lower static
levels you are finding on the Omni-C.
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