Junction Noise

[danial stocks]

>
>Again: the individual transistor parameters have a great influence
>on noise. There is a lot of variation. Low noise types are often
>selected devices. E.g. a 2SC828 may differ in this respect from
>manufacturer to manufacturer. Most transistors amd diodes
>are not designed to run in avalanche breakdown, there's
>no spec for this mode, so I wouldn't expect that a specific
>type would always behave the same, if you pick -say- 100
>transistors with the same stamp but diffrent supplier.

Well, yeh, I agree with this in principle, but I also say the 828's are good 
from having tested quite a few of them and achieving consistently good 
results.. Admittedly I haven't tried these from different mfr's, but from 
going thru my jar of transistors, I tested quite a number of each type of 
device which I had on hand that I thought to try out.. I think I tried 
2SC536, 828, 930, 945, BC547, maybe some 2n.. was a while ago...

Cheers,
Dan
_________________________________________________________________________
Get Your Private, Free E-mail from MSN Hotmail at http://www.hotmail.com.

Share information about yourself, create your own public profile at 
http://profiles.msn.com.