zhang_junyang 0 Report post Posted December 23, 2008 Ideally, the beta value of a transistor should be taken based on the same operating conditions that it will be operating in the amplifier. 2 transistors that are matched under a circuit may not be matched when they are put inside the amplifier circuit. However in reality, I would not worry too much about matching transistors as they are mostly not critical. An approximate matching using the dmm will do. Share this post Link to post Share on other sites
adn6244 0 Report post Posted December 23, 2008 Thanks Alvin/JunYang for sharing the finding/thoughts. As a layman in electronics/circuit design, I can't really tell technically it makes sense to match and how the reading may change in the real circuit. Even from the user point of view, I may not even notice the difference if I don't have another identical amp to compare the effect of different components in terms of brand and reading has over its performance. For now, finger crossed and hope that it will sing when it's done Share this post Link to post Share on other sites
