Transistors 101 episode 9: The Quest for More Voltage Gain

Last time, we chased after current gain in our transistor circuits. This time, we go after voltage gain. What are the limits for voltage gain in a single stage?

Schematics of what we built and tested are on the project GitHub:
https://github.com/kennykb/kevins-cav...

00:33 A tiny emitter resistor?
02:47 Building circuit with a tiny resistor
03:25 Missed the bias point!
04:36 Hit it with a trimmer?
06:01 It seems to work...
06:31 ...until the temperature changes.
07:54 Emitter bypass to the rescue
09:14 Gains of 10, 20, 50, 100...
09:34 ... how high can we go?
09:56 Testing it out
11:15 What is going on at the highest gains?
12:17 Tune in next time and find out!

Image:

"Ripon Cathedral Choir 2, Nth Yorkshire, UK"
Diliff
https://commons.wikimedia.org/wiki/
File:Ripon_Cathedral_Choir_2,_Nth_Yorkshire,_UK_-_Diliff.jpg
CC BY-SA 3.0 https://creativecommons.org/licenses/...,
via Wikimedia Commons

Music:

"Deus in adjutorium meum intende"
Schola Gregoriana
https://commons.wikimedia.org/wiki/
File:Schola_Gregoriana-Deus_in_adjutorium_meum_intende.ogg
CC BY-SA 3.0 https://creativecommons.org/licenses/...,
via Wikimedia Commons

“Light Sting” Kevin MacLeod (incompetech.com)
Licensed under Creative Commons: By Attribution 4.0 License
http://creativecommons.org/licenses/b...