Tim ODonnell wrote:

I don't want any extra knobs to turn that's for sure. One post talked about
propagation noise over receiver noise or other noises. now we're reaching
the limits of my knowledge. I don't know what propagation noise sounds like!
So that in itself is a problem. I use an old R8 and it doesn't overload I
know what that sounds like. I was just hoping that on occasions that I could
possibly eliminate cross talk on frequecies that I cannot tune out thru the
passband. It is the same type of problems that everyone has who loves to
listen to the radio and DX. I just thought that the Preselector might be a
tool that might be used to reduce a little noise, intermod and other types
of interference. Sorry folks I don't know all the terminology I just like to
listen and tinker a little.

If anyone else has something to share on this subject I am interested to
here what they have to say.

Tim

Now I see what you're getting at. Preselectors are generally used to
improve the dynamic range of receivers (usually portables) that suffer
from spurious signals caused by intermodulation. The R8 has very good
dynamic range so a preselector is not likely to improve it
significantly. As for improving the bandwidth (selectivity) to reduce
"cross talk", a preselector would be useless. The tuning is not sharp
enough to reject a signal only a few Khz from the desired station. If
you really want better selectivity, I suggest trading your R8 for the
R8B. The selectable sideband sync' detector of the latter does wonders
for reducing and often eliminating adjacent channel interference.


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