I own a zetagi vhf 2m amp, its a B40. nothing wrong with it at all, powers into a dummy load no issues.
so as a newbie beginner i want to do several things with this amp.
first up i want to know how it works, so i am looking for pdf and web pages on how an amp work, not this exact make and model but general low power amps, what are the basics?
next is how to test it, i own a few test items of kit but not a full spectrum analyser or scope, so how do you test and or fault find an amp with a dmm? and what other items ( cheap beginners evel) can you suggest for the get on the shack bench?
last question is what to build to improve its performance. i am thinking something to clean the signal or to control its pattern, filters perhaps or some other items. all designs i want have to be home built and therefore simple. its an educational item not a ground breaking design