In this video, I did a comprehensive teardown of a S-A-A-2 NanoVNA (50kHz - 3GHz). Since the design of the S-A-A-2 is open-sourced, you can easily identify all the sub-circuits. You can get one from https://ban.ggood.vip/11peX High resolution pictures can be found at http://www.kerrywong.com/2022/04/03/nanovna-saa-2n-teardown-pictures/
coupon code:BG2ab9c9 ($95.99)
exp:5.31
00:00 Introduction
06:27 Teardown