What is Reddit's opinion of Portable TinySA Spectrum Analyzer,SEESII Upgraded V0.3.1 Handheld Tiny Frequency Analyzer 100kHz to 960MHz MF/HF/VHF UHF Input,Signal Generator with 2.8 inch Touch Screen with ESD Protect Function?

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I used a spectrum analyzer. They used to cost a fortune, but quick check on Amazon and they're in the $100 range. They make frequency tuning easy because you can see the spike move as you tune and you can see other noisy areas to avoid.

Not a recommendation, just an example:

Portable TinySA Spectrum Analyzer,SEESII Handheld Tiny Frequency Analyzer 100kHz to 960MHz MF/HF/VHF UHF Input,Signal Generator with 2.8 inch Touch Screen Battery https://www.amazon.com/dp/B08FB5XT7B/

A TinySA Pocket sized Spectrum Analyzer. It essentially looks at a range of radio signals and graphically displays them. You can get them on Amazon I have one and they're very interesting and a lot of fun to play with.

A couple of my guys just bought these, and seem to like them. I haven't jumped aboard yet though, so your milage may vary.

Portable TinySA Spectrum Analyzer

One more question. What do you think about this one? portable tiny SA spectrum analyzer