On 8/10/2012 6:53 AM, tony sayer wrote:
In article , Trevor Wilson trevor@SPAM
BLOCKrageaudio.com.au scribeth thus
On 8/7/2012 4:12 AM, Dave Plowman (News) wrote:
Have a circuit from the '70s I wish to try and it uses BC 109/179
complimentary pairs. Is there a better choice these days that is a direct
substitute?


As PA suggested, the BC109 came in a hermetically sealed metal can. That
made it superior to almost any plastic pack device.

Any reason why that should be Trevor?..

Or did you mean at the time the BC 109 came onto the market?..

**Yes and, no. IME, low power, metal can devices demonstrate superior
long term reliability to pre-1980-ish plastic devices. That said, modern
plastic devices appear to provide excellent long term reliability as well.



--
Trevor Wilson www.rageaudio.com.au