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I decided to further test the ones I had pulled out of various pieces
because of the leakage. I know they test as a diode. The round lead 0367
types with the oxidation on the leads close to the body test as a diode
from E to C. The square leaded ones of both numbers tested as a diode from
C to E. I used a VTVM on Rx1 for the leakage testing. I then wondered how
the round leaded ones could operate properly or at all with the leakage
from E to C. I found this to be an interesting test on these transistors. I
am not sure why the leakage reversal unless it was a production change. I
know and have seen transistors go bad with age even operated light-duty.

The 0402 I have only found in the 7D15 plug-in. The ones with a blue
face did not have the diode leakage. Those must be a late production run.

Mark

I had made a mistake on the round leaded ones. They are leaky the same way as the square leaded ones. The bend in the leads is opposite, Base is to the back instead of the front. I apologize for any confusion.