chemelec
Well-Known Member
Yes it is a 2SD401A. Just a Poor Font.
A Little Known Fact, Be Aware, there are TWO Different 2SD401A's.
Can't rememeber the Desigination, but One is Just an Audio Transistor.
The Other is a "K" SERIES and is Much Higher Frequency. This is What is Required in this circuit.
When doing a Production Run years ago, I purchased the Wrong One. Bad Mistake, but that was when I found this out.
A Little Known Fact, Be Aware, there are TWO Different 2SD401A's.
Can't rememeber the Desigination, but One is Just an Audio Transistor.
The Other is a "K" SERIES and is Much Higher Frequency. This is What is Required in this circuit.
When doing a Production Run years ago, I purchased the Wrong One. Bad Mistake, but that was when I found this out.