Dieter DC6EH from Kempen conducted a direct performance comparision of the IceConeFeed v2.0 vs v2.1. A continuous 1750Hz tone in USB was sent on 10498.960 MHz. He used the WebSDR http://websdr.is0grb.it:8901 for SNR measurements.
Station setup was a 85cm Fuba sat dish.
As shown by the spectrum below v2.1 features almost the same transmission performance as v2.0 despite having 2.2 turns vs 3.5 turns on the v2.0.
The test run was conducted on 18.03.2023 from 00:50 to 01:10 UTC.