BC109 Gain?

[Joachim Verghese]

On Mon, 13 Jan 1997, A.S.P. wrote:

> Can someone please tell me what a typical gain value for a BC109
> transistor is?  I'm looking for a suitable American substitute.

The BC109 (without a B or C suffix) has a typical current gain of
200 (at Ic = 2 mA), and is typically used for its low noise specs.

Therefore, I'd recommend using, for example, a 2N5089 (National, 
Motorola) as substitue, if the gain parameter isn't critical.
(The 2N5089 has a gain of 400).

-joachim