[Amps] More on "baby ur radio"

[Roger (K8RI)]

Migration is a fact of life and common to all bipolar transistor.  See 
my earlier post.    It is intrinsic to the purity material used.  IE: 
Newer is better.  It is not a manufacturing defect and is entirely 
different than the purple plague.

It is the migration of minority carriers across a junction. IE.  The 
majority carriers migrate to the N-type material where they are minority 
carriers.  This degrades several of the transistors performance factors, 
such as gain and frequency performance.

73

Roger  (K8RI)


On 12/20/2015 Sunday 12:52 AM, Bill Turner wrote:
> ------------ ORIGINAL MESSAGE ------------(may be snipped)
>
> On Sat, 19 Dec 2015 22:40:28 -0600, you wrote:
>
>> Migration is a real phenomenon but it's a quality defect, and not part of
>> the normal operation. Google "purple plague."
> REPLY:
>
> So, absent migration, do transistors "wear out"?
>
> 73, Bill W6WRT
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