The 2SC2240 you have on the left side seems authentic to me. Check the flat side on top, if there's a line about 2 mm long right in the middle,
I'm pretty sure it's genuine. I'm not sure about the one on the right, never seen printed markings like that before.
Genuine 2SC2240 (engraved and printed marking) should look like this:
I'm pretty sure it's genuine. I'm not sure about the one on the right, never seen printed markings like that before.
Genuine 2SC2240 (engraved and printed marking) should look like this:
In my nearly 40 years of experience with transistors, I've noticed that Toshiba TO-92 always have the same physical shape. Whether they're BJTs, JFETs, or even MOSFETs. Whether the markings are engraved or printed, the physical shape remains consistent.
They have the physical characteristics like this: (Thanks to punkydawgs for the pic)
Hope this helps!
They have the physical characteristics like this: (Thanks to punkydawgs for the pic)
Hope this helps!
the right one is genue, the left one- not sure, casing seem smaller, but letterng is OK, need to see top of the tansistor
those are genue toshiba.one is older edition (silk scren) vs laser engraved (newer)
Oh great , because that DNM preamp is a bytch to work on and the PCB traces are hairline wide. Lovely sounding soap box though with that translucent dark acrylic casing.