Pedalbuilder's Germanium Transistor Measurements

[PedalBuilder]

For everybody's reference, here's a spreadsheet with the measurements I've made of the germanium transistors in my stash. All measurements were taken using a Peak Atlas DCA55 at approximately 70ºF/21ºC.

Germanium Transistor Measurements

docs.google.com

The sheet has three tabs. The first tab is an overview that shows the median gain and leakage for each transistor type. The second and third tabs show all measurements for PNP and NPN germanium transistors, respectively.

I omitted any transistors that measured as nonfunctional. The only types with nonfunctional transistors were 3AX31C (approximately 25% nonfunctional), 3BX31A (approximately 30% nonfunctional), and 3BX31B (approximately 80% nonfunctional).

 

[Locrian99]

For everybody's reference, here's a spreadsheet with the measurements I've made of the germanium transistors in my stash. All measurements were taken using a Peak Atlas DCA55 at approximately 70ºF/21ºC.

Germanium Transistor Measurements

docs.google.com

The sheet has three tabs. The first tab is an overview that shows the median gain and leakage for each transistor type. The second and third tabs show all measurements for PNP and NPN germanium transistors, respectively.

I omitted any transistors that measured as nonfunctional. The only types with nonfunctional transistors were 3AX31C (approximately 25% nonfunctional), 3BX31A (approximately 30% nonfunctional), and 3BX31B (approximately 80% nonfunctional).

I migjht have to revisit my 3ax31c. The ones i testsd all were ridiculously high as i recall first 5 and i stopped.

Did you buy from ali e?

 

[PedalBuilder]

I migjht have to revisit my 3ax31c. The ones i testsd all were ridiculously high as i recall first 5 and i stopped.

Did you buy from ali e?

Yes, I bought my 3AX31C on AliExpress.