These are now INRAD filters, the International name being from
the old company. There has been a lot of discussion about
these, you might check the archives. To summarize, the INRAD
filters are a bit more expensive (by $20), have steeper skirts,
but are lattice (as opposed to ladder in the Ten Tec / NS
filters) with different design so the static crashes may sound
different through them. This is something I have not yet
experienced, but need to do some side by side comparisons to
hear.
Clark
WA3JPG
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