So they carved out the middle and they didn't tell you.. Nice. Well, I was hoping that I could up my LTSpice gain by playing Monte Carlo w= ith the transistor gains, but it sounds like I should assume flat and make = sure that everything across the range is workable. -- David VanHorn Lead Hardware Engineer Backcountry Access, Inc. 2820 Wilderness Pl, Unit H Boulder, CO =A080301 USA phone:=A0303-417-1345 =A0x110 email:=A0david.vanhorn@backcountryaccess.com=A0 -----Original Message----- From: piclist-bounces@mit.edu On Behalf Of Denny = Esterline Sent: Thursday, March 14, 2019 2:14 PM To: Microcontroller discussion list - Public. Subject: Re: [EE] transistor gain variations Frankly, I don't know. But I would suspect the answer is "neither." Effects of the manufacturing process are most likely to be Gaussian. But so= many things these days are tested and "binned" (sorted by various specifications) during production for various reasons. Sorting processes in= general wreak havoc on statistical behaviors. :-) A few years ago I was looking at some data that had a noticeable "double pe= ak." After more digging than I care to admit, I found out that the parts we= re being sorted before I got them - the ones that tested near nominal spec = were being sold to someone else. -Denny On Thu, Mar 14, 2019 at 5:36 AM David Van Horn < david.vanhorn@backcountrya= ccess.com> wrote: > Does anyone know if transistor gain variations for the same part, unit=20 > to unit, are distributed flat across the min-max or gaussian? > > -- > David VanHorn > Lead Hardware Engineer > > Backcountry Access, Inc. > 2820 Wilderness Pl, Unit H > Boulder, CO 80301 USA > phone: 303-417-1345 x110 > email: david.vanhorn@backcountryaccess.com david.vanhorn@backcountryaccess.com> > > -- > http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive=20 > View/change your membership options at=20 > http://mailman.mit.edu/mailman/listinfo/piclist > -- http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/chang= e your membership options at http://mailman.mit.edu/mailman/listinfo/piclis= t --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .