DESCRIPTION:
Testing various diodes on a Klone circuit. The PCB is a madbean Sunking II.

The diodes I tested are:

3mm LED (~1.5v forward)
1N4148 Si (.559v forward)
1N34A Ge (.265v forward)
1N5818 Shockley (.131 forward)
AN306 Ge (.193v forward)
1N270 Ge (.220v forward)
Japanese White Ge (.213v forward)