I built and tested several similar antennas similar to this one a few years back for use with Wireless microphone receivers. I used the NanoVNA for gain/SWR testing them (the TinySA didn't exist yet). They're almost impossible to get wrong!
I highly recommend the discone as an ?easy to build (other than the usual cautions about cutting your fingers!) and high performance wide band antenna. I still use a larger one in my attic crawl space for spectrum monitoring down to 50mhz and as a secondary transmitting antenna for local VHF/UHF repeater access...
The only tricky bit is getting the insulator/mounting point right - I never found a solution for this that was strong and easy to build repeatably - mine all ended up being "artisanal" one-off objects made out of scrap parts. Did you find a good solution for this?
M
