From: Don Kuenz <mail@crcomp.net>
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Date: Wed, 12 Feb 2020 14:11:39 -0800
Subject: Re: [EE] TL431+NPN as rated series regulator? Circuit questions.
Thread-Topic: [EE] TL431+NPN as rated series regulator? Circuit questions.
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=20
Sean Breheny <shb7@cornell.edu> wrote:
> Which manufacturer's TL431 datasheet is this from? I presume they meant
> 2N2222 not 2N222 (an ancient germanium transistor)

My 1974 Archer _Transistor Substitution Guide_ classifies the 2N222
as a PNP low power alloy-junction germanium transistor, which doesn't
jibe with the NPN transistors shown in the schematic.

By the way, this question was posted by me to news:sci.electronics.design

--=20
Don Kuenz KB7RPU
There was a young lady named Bright Whose speed was far faster than light;
She set out one day In a relative way And returned on the previous night.

--=20
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