Since there's a delay with the BBD contest ( progress is being made....there is an expert on it ), I just finished testing and cataloguing a lot of 50 Germanium PNP MP21As, so let's do some contesting!
I loaded the values into my Ge stash spreadsheet, and retrieved the average GAIN and LEAK values.
That's where YOU come in. No...not them....yes YOU!
The 3 closest guesses to average GAIN and LEAK between the time of this post and Midnight, Friday July 30th (this Friday) will each win a $25 PedalPCB gift card. If you guess both values exactly...yeah right!*
Now, some of you are thinking "I don't even know what's in the ballpark or what units to use" ...I know because I can read minds....Here's your chance to learn enough Germanish to impress the neighbor's dog! I gave you the part number above. Find the datasheet, it might have a clue on the GAIN. LEAK values are fairly unpredictable, but I'll tell you that they are all below .120mA [ µA values acceptable...please denote ]. Gain values are simply integers.
If you want to learn more about these components and their attributes, I highly recommend starting here;
We see lots of discussion here and on other forums regarding hFE, but I get the feeling that many of us don't really know what it means or why it's important. First, a little background. Bipolar transistors are current-mode devices. We have to supply base current to get collector current...
*Say wha?.....It's possible you say? Do it and you'll also win a $100 gift card to PedalHacker's store to buy groovy mojo doodads. Zippety-do-dah!