[sdiy] SMT transistor for white noise?

[Gordonjcp]

On Sat, Dec 13, 2025 at 11:11:54AM +0000, Mike Bryant wrote:
> Too true 🙂   A large percentage of the world's small signal transistors now come from a huge fab in Chongqing and they just brand them to whatever their client wants.
> 

Many years ago I bought a bag of something like 500 of the cheapest Chinesiest BC548-wannabes from Some Dude In Shenzen On eBay, expecting to maybe hand-match a couple of sets of a dozen reasonably close ones for filters.

Nope.

Any two you pulled out of the bag at random would have the same Vbe down to *microvolts*.

So that was a quicker evening than I anticipated.

-- 
Gordonjcp