https://www.amazon.com.au/Xiegu-Radio-Structure-Built-Antenna/dp/B08X6Z6KN2/ref=asc_df_B08X6Z6KN2/?tag=googleshopmob-22&linkCode=df0&hvadid=463520583303&hvpos=&hvnetw=g&hvrand=17594822417806363194&hvpone=&hvptwo=&hvqmt=&hvdev=m&hvdvcmdl=&hvlocint=&hvlocphy=9112533&hvtargid=pla-1211821844399&psc=1

These look pretty frequency agile. Amps + Antennas look like a whole other story. I’ve remember seeing #[3]​s btc txs a while ago but nothing seen since a few years ago.