I see that INRAD is taking orders for the OMNI VI roofing filter kit.
The performance measurements on their site show that, the unmodified
stock OMNI VI has better intermod performance at 2kHz spacing than the
FT1000MPs modified with the similar INRAD kits (79 dB DR for the
stock OMNI VI, vs 71 for the FT1000MP (79 for the more expensive
FT1000MP Mk V
after modification). But, the modified OMNI VI showed 94 dB DR with a
600 Hz roofing filter, 85.5 dB with a 2.4 kHz roofing filter.
Terry Zivney, N4TZ/9
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