As a matter of fact?
Yes. The worst offsets I have in my FT8 log are -2.6 seconds and +2.5 seconds.
There's also still some opportunity for latency optimization.
With clever coding that can be reduced.
I have a prototype SSB modulator with ~62ms latency working, which is running directly on the PlutoSDR. But I don't think such drastic measures are actually needed for practical usage of FT8.
I've used these antennas in the past for WiFi use.
I measured a +19dB signal increase when switching one side from an omni-directional antenna to a "24dBi grid" antenna like that.
The remaining 5dB are probably cable/adapter losses, measuring imperfections and the little bit of gain the lambda/4'th omni antenna had. But yeah, the claim seems reasonable.
I use a PlutoSDR with SDR# (modified with external reference input to have absolute frequency stability).
vy 73 de DL4TMA
