Spiral loop 40M

Specs:

Built this antenna according to NonStopSystem's plans as an experiment. Has some interesting results, I must say.

Not really promising, but then again, it's a test loop. The capacitor for the tuned loop is a PCB type, and it needs to be bigger because I don't reach capacitance yet. Scanning a range it shows a nice but unexpected story:

It has resonance on some other interesting frequencies, let's dig a bit deeper:

At 2M it's SWR is at 4.5, not great but better than the Nagoya. Another dip is observed, let's see the 70cm results:

Pretty resonant with the center band at SWR 1:1.5…

Conclusion:
Might not be my go-to when I start hitting the HF bands, but surprisingly performs quite OK on 70cm.