>I assume we will face the same problem using the
newer filters as well, needing to put them in
No Don. The Orion II fixed the problem
by using all 4-pole filters, the same IF and
no following amplifier. So they all should
be put into their "correct" positions. The
Inrad 762 is a band-aid solution for Orion,
although it works very well and should have
identical front-end performance to the Orion II
using the TT 2001 600 Hz. Will be interesting
to see ARRL's test of the O2 since IMD and BDR
at 1-2 kHz will give us another data point on
Orion with the 762. Sherwood said 6-7 dB better
IMD at 2 kHz and ~10 dB better at 1 kHz spacings.
This implies 92-3 + 6-7 = 98-100 dB at 2 kHz
and 84 + ~10 = ~94 dB at 1 kHz. No idea how much
BDR will improve since Sherwood did not check it.
73, Bill W4ZV
P.S. Filter>Auto will also work better in O2
since all filters are in the correct slots, so
the BW will switch at the right points.
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