Teknetics g2

[Ilka]

Hello, I'm looking for a diagram and everything possible as a dervish guide for Teknetics G2 , Fisher f19 , Tianxun tx-850 .
I tried to find something without creating a topic, but I couldn't find it. I'm a beginner and I want to learn with a tianxun tx-850, so I'm curious about the differences in the different names of the device. I have an oscilloscope and other instruments and I would really appreciate it if someone could give me the schematics.

[etznab]

Hi, I only have this screenshot and video making comparative of brands.

https://youtu.be/1AfQ8u2BjN4

Left is tx850. How to make a coil to little nuggets for this detector, any ideas?. I think in how to because this items, the coil original is best expensive. In aliexpress have a this with name GoldFinder. And I saw videos from a Brasilian Chanel.

Coil GoldFinder. Someone can make reviews please ?
https://es.aliexpress.com/item/10050...origin_prod%3A


What is more cheap? buy this coil in ali or make it oneself?

. Thanks