Yup, it was just counterfeit/junk transistors. I got my real MPSA42’s in the
mail today, and I got them to work almost flawlessly.
Sent from my iPhone
> On Feb 9, 2019, at 20:43, gregebert wrote:
>
> This is where a curve-tracer really comes in-handy. Sadly, even old used ones
> are a bit
This is where a curve-tracer really comes in-handy. Sadly, even old used
ones are a bit expensive compared to scopes from the same era.
I've been tempted many times over the years to design my own, but like most
projects I dream-up I never get time to build them.
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When I plug it into a multimeter’s hFE slot for E-B-C I get a reading of 140
hFE, when I plug it into the B-C-E slot I get a quick 1600 hFE, and then just a
1 in the far left digit of the screen almost like a processing/measuring
reading, like what the multimeter does when you measure V and you
That's a good point. I was a bit surprised that the transistor said "A42"
and not "MPSA42", as it should. Perhaps it's a 2SA42!
The MPS series was started by Motorola, which is no longer in the component
business.
On Sat, Feb 9, 2019, 11:10 AM GastonP Did you verify that you verified that the
Did you verify that you verified that the layout is E-B-C? Or is it B-C-E?
On Friday, February 8, 2019 at 9:35:14 PM UTC-3, Thomas Kummer wrote:
>
> My understanding is that a MPSA42 is an NPN transistor and the MPSA92 is a
> PNP. My understanding of how an NPN transistor works is that when the
