[INRAD] 762 versus 763 roofing filter for Orion

[Bill Tippett]

N7US:
 >I see that the 762 and 763 have different center frequencies.  How do 
they perform differently used as roofing filters in an Orion?

         Jim, the filters should be identical in terms of
insertion loss, shape factor, etc.  HOWEVER, I would
only use the 762 in Orion because its center frequency
is 9.001500 which the "1000" and up positions assume.
If you use the 763 in one of those positions, it will
NOT be centered and there is no C.F. Adj. so it cannot
work correctly.  Same holds true for the 765 filter BTW.

                                 73,  Bill  W4ZV