Team,

After only one night with FST4-60 on 160, it's obvious that if we want to maintain full IF bandwidth, 1837.5 or 1838 would be a far better choice, using offsets in the range of 2,000 - 2,500 or 1,500 - 2,000 Hz respectively. Either puts TX between 1839.5 and 1840. The reason is simple -- very strong FT8 signals set the top range of what the A/D can handle, putting very weak signals below its dynamic range.

Thoughts?

73, Jim K9YC


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