View Single Post
Old 7th Dec 2017, 10:17 pm   #20
Argus25's Avatar
Join Date: Oct 2016
Location: Maroochydore, Queensland, Australia.
Posts: 2,118
Default Re: Matched Transistors

Originally Posted by kalee20 View Post
Ah, AD161/162, that's NPN/PNP.

Matching these is about as similar as getting a man and a woman of the same height and weight.
That is a very good way to put it

I've never had much joy from these transistors, they are quite easy to damage in experimental amp setups. But the NPN/PNP combo did help eliminate output transformers.

In the end one of my favorite audio circuit topologies uses a split driver transformer, which is often not to bulky at all, a pair of PNP's like AD149's. That way you have the best of both worlds and eliminate the output transformer mass and can even match the transistors, if you believe it makes a difference.
Argus25 is offline