Using the Yosoo GM328 a guide for radio and electronics experimenters

The Yosoo GM328 is one of the most popular and unique pieces of budget test equipment introduced over the last few years, but without a user's manual and with little documentation, details of its inner workings (or its full capabilities and limitations) have remained a mystery to most users.
Until now...
Get ready to take a deeper dive into the the Yosoo GM328! This book starts with the basics and digs deeper to explain things like how the GM328 really tests capacitor ESR, how it can be used as a signal source, and how to interpret the results for a Darlington transistor. Or maybe you need some help because the contrast control has been accidentally adjusted to a level that makes the display unreadable or you are suddenly seeing an error message that says the GM328 is out of calibration.
This book has something to offer whether you are just getting started in radio and electronics or already have a bench full of test gear. If you are looking for the right transistor to use in that new QRP rig, a detector diode for a vintage crystal radio set, or need to know if a MOSFET with questionable markings has diode protection built in, get ready to find the information you need to get the job done.
Much of the contents is also applicable for those using other brands and models of testers which offer similar features and capabilities. These include the SainSmart GM328, the INSMA 12864 / GM328A, the KKmon GM328, and the DROK Mega 328.