WOW, I have not see this much fur flying in a long time.
It was simply a matter of time before a radio showed better numbers than the
K3,
it had to happen. Now that it has, good for Yeasu. But it does not mean my
two
K3's do not work anymore or I am not able to use them, Heck No. The fact t
On the Ten Tec Eagle list, Rob Sherwood just posted a very interesting
response to the 2 kHz DR rankings being discussed here. Apparently, there's
a measurable amount of IMD difference not only between roofing filter
production samples, but the manner in which they're inserted. For example,
o
I haven't (yet) seen Rob's comments, cited by Paul. The designers across the
pond are well-aware of the IMD effects in crystal filters, for example here:
http://www.xs4all.nl/~martein/pa3ake/hmode/roofer_intro.html
I have searched for, but have not found, remarks that I recall being made by
Wa
An unfortunate choice of terms on my part has caused some confusion.
While my particular filter's passband is asymmetrical, something mentioned in
passing, the asymmetry I was really referring to is a difference between
something on one end of the filter from the other. It could be either a
cr
> So considering the potential effects of asymmetry in the build of
> the filter(s) it doesn't surprise that reversing the filter might
> make a difference, *if* filter IMD is the dominate factor.
Reversing the filter in the mounting does not effect bandpass symmetry.
However, if the filter ski
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