View Single Post
Old 6th Dec 2017, 12:24 pm   #3
MrBungle's Avatar
Join Date: Jun 2016
Location: London, UK.
Posts: 3,374
Default Re: Matched Transistors


I think the only time I've seen this being a problem is in discrete differential amplifiers, typically where I am being too cheap to buy a CA3028 for a circuit. Keeping them at the same temperature helps there, enough to be useable. I pick two (2n3904's) with an hFe within 20 or so and then thermally bonded them together with heatsink compound and stick some heatshrink over the pair. Worked very well.
MrBungle is offline