Sven schrieb:
So the range is identical to a discone? 50-1300 MHz ? I don't really
understand the band calculations.

The 1:3 SWR bandwidth of the X-5000 is app. 80 to 1300Mhz.
The 23cm band is in the 1.2 Gigahertz range where the X-5000 works as a
5/8 antenna.