If you were going to organize germanium transistors by specs instead of part # how would you?

nate433

Active member
Whether it's certain hfe range, leakage, or a combo of both? Obviously PNP vs NPN.
I'd imagine you'd want to do it by common hfe ranges for vintage fuzzes, then maybe sub organize by leakage?
 
I've just got mine separated by type at this point... and then I have to measure... and measure again. I should really subdivide them.
 
I sort mine by part #. I audition them on a breadboard or maybe a socket on a PCB. I usually don't see all that much spread in HFE or leakage for a specific part number, but there are notable exceptions. Most of my AC127s are very leaky. Most of my PNPs and 2N1308s are low leakage. I have a tone of 2N1308s and 2N1309s. There is a 5:1 HFE range on those, so the high HFE ones get a color-coded dot on top. At the end of it all, I have to audition them because it's hard to predict which ones will sound the best. Some circuits are pretty forgiving. Others require just the right HFE or leakage. I plan on having to tweak a resistor or two to get it dialed-in. Building with Germanium is far from a plug-n-play process.
 
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