[time-nuts] Low noise quartz crystal oscillator by Bruce Griffiths

Hal Murray hmurray at megapathdsl.net
Wed Oct 28 13:38:43 EDT 2015


richard at karlquist.com said:
> The 2N5179 in the 10811 is selected for minimum beta and Ft at 20 mA, which
> is the start up condition due to the ALC being at full gain.  It has a
> special HP part number, so you wouldn't know this just looking at the parts
> list. 

How much of a difference does that selection step make?

I'd expect the parts within a batch to be very similar, more so for mature 
parts.


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