[TenTec] Orions SO2R in CQ WW RTTY

[Bill Tippett]

         Thanks Carl!  Although Orion's S-meter is more linear
than most, it could be that you were in a non-linear area and
the actual attenuation was not quite 60 dB.  Here are
measurements made by W8ZR in January which I
converted to S-meter dB (with S9 = 50 uV):

S-Meter Actual Signal
         S1              S9 - 44.4 dB
         S3              S9 - 30.5 dB
         S5              S9 - 20 dB
         S7              S9 - 11.7 dB
         S9              50 uV
         S9+10           S9 + 8 dB
         S9+20           S9 + 18 dB
         S9+30           S9 + 29 dB
         S9+40           S9 + 42 dB

         If you weren't truly -60 dB down, you would
measure a narrower -60 dB bandwidth and therefore
narrower shape factor for narrow BW filters.  The
wider BW filters have skirts that slope much more
rapidly so an error there would not show up as
much as for gently sloping skirts (like the narrow
BW filters have).

                                         73,  Bill  W4ZV