If you want to know if your radio is "clean" – that there are no spurious emissions on harmonics of the fundamental frequency – here is a quick and affordable way to do it.
FCC Part 97 Ruling: https://www.ecfr.gov/current/title-47/chapter-I/subchapter-D/part-97#p-97.307(e)
Tiny SA Link: https://store2.rlham.com/shop/catalog/product_info.php?products_id=75243
SMA Attenuator: https://amzn.to/3S3oyXf
Celwave Dummy Load: https://ebay.us/C81ghK
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