No, it should be 11-14 turns (if using 1mm insulated wire; other gauges of insulated wire are different).
Additionally, it's not recommended to add a capacitor at the bottom; the current at the base of the oscillator is high, which reduces efficiency. It is suggested to purchase a 0.5m long wire.1m long M10 screw (available online, various brands)(-60 yuan), making it a middle plus sentiment.
I've got a coil calculator for you, and I also got it from another group (
File shared via cloud storage: Calculation of antenna inductance - BG8NSK.xls
Link: https://pan.baidu.com/s/17JSBWYLXbJUDwIkrMenOCg?pwd=7043 Extraction code: 7043. Copy this content and open the Baidu Netdisk mobile app, which will make it easier to operate.
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