[Elecraft] No FT8 Decodes pn 80 Meters

[Richard]

K3s + KAT500 + 80m dipole

Using DATA mode on all bands, and have been ever since FT8 was invented.

This evening was my first look at working FT8 on 80 meters. The tuner is giving the radio a 1.0:1 match, and the waterfall is busy.

But there’s no decoding happening! I checked BND MAP in the CONFIG menu, and 3.5 is enabled.

Switched to 40 on the same antenna — great gobs of decodes.

Back to 80 — no decodes despite lots of signals in the waterfall and in my ears.

HOWEVER! If I switch to USB on 3.573, everything comes to normal life: waterfall AND decodes!

It gets weirder.

3.573 in DATA mode: I can transmit normally with normal ALC and power readings, but still nothing decodes.

3.573 in USB mode: I cannot transmit — NO ALC or power readings. But the waterfall and Decodes are normal!

WHAT?

I’ve gone through all the WSJT-X preferences (settings) and can find nothing overlooked.

Ideas?

Richard — W4KBX