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DIY Stompboxes => Building your own stompbox => Topic started by: tsr on August 13, 2004, 10:07:09 PM

Title: Using a transistor tester to determine true gain.
Post by: tsr on August 13, 2004, 10:07:09 PM
Hey folks.

I just acquired a transistor tester to sort through several batches of germanium transistors.  This tester measures gain as Beta and leakage (Ico) in microamps.  My question is how do I determine the true gain of the transistor (total gain minus the leakage) when I know Beta and the leakage in microamps?  Thanks.

Tim
Title: Using a transistor tester to determine true gain.
Post by: brett on August 13, 2004, 10:42:46 PM
Check the transistor tester at geofex.com  :D
Title: Using a transistor tester to determine true gain.
Post by: tsr on August 13, 2004, 11:20:26 PM
Thanks Brett.  I have built and used the transistor checker described in the Technology of the Fuzz Face article.  However, I'm a sucker for old test equipment, such as this transistor testor, and was hoping that I could use it for testing germanium transistors.  After receiving it, I realized the units for gain and leakage were not the same, but figured there must be a way around that-some calculation of sorts.  I'll have to think about it some more.