[sdiy] Noise transistor (again)

rsdio at audiobanshee.com rsdio at audiobanshee.com
Thu Oct 8 03:08:28 CEST 2015


BC848 might be similar, and is available in SOT-23. I have no experience. It's probably worth contacting Fairchild or Diodes Inc for a cross-reference to BC548 in SMT. You might even find such a cross-reference on their web site.

Brian


On Oct 7, 2015, at 5:40 PM, Tim Ressel <timr at circuitabbey.com> wrote:
> So after a bit of playing with noise circuits I have 2 conclusions: the BC548 has good noise amplitude, and you have to watch DC offsets on the high gain amplifiers. I think I'll go with non-inverting amps with AC gain only.
> 
> However I need an SMT transistor. Is there an equivalent for the BC548 in SMT?  Or an SMT version for that matter?



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