Transistors

[Mark Hennessy]

At the moment I figured I'll revise cathode followers and see how that compares with grounded emitter.

It doesn't.

Compare to emitter follower (aka common-collector) instead.

The Art of Electronics - http://wouterjan.deds.nl/The%20Art%20of%...20Hill.pdf - starts out by explaining emitter followers. Page 65 of that PDF. Please forget about ARRL and use this instead. Please. If you're unable to download that and read it at home, then second-hand copies of the first edition can be found for about a tenner: https://www.ebay.co.uk/p/Art-of-Electron...2279589420 - alternatively, if you put a "wanted" request on the forum, someone here might well have a copy going cheap (in return for a promise to stop referring to that damn ARRL book). Another good book is this one: https://www.amazon.co.uk/Intro-Electroni...0521478790 - again, s/h copies of earlier editions can be found cheaply: http://www.ebay.co.uk/itm/A-Practical-In...3021151961