I had a G5RV Jr in my box, but it need to be repaired. I installed 15.6′ of new ladder line and 1:1 balun. I checked the SWR with my NanoVNA-H4 and found it has low enough SWR at 2.1@ 28.275Mhz (10m) , 1.7@14.100mhz (20m), 2.0@7.275mhz (40m)
This antenna is expected to work well on 40-20-15-10m bands according to https://www.wireantennas.co.uk/hf-g5rv-jr-antenna
Checking the ft-8 on 10m, 20m and 40m bands showed it was working significantly better than the Comet CHA250HD. 15m is the only band that the Comet worked better.
Here is the whole HF band, with dips at 40, 20,15 and 10m.
40m SWR is at 1.4
20m SWR is at 1.785
15m SWR is 4.008
10m band SWR starts at 1.96