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Re: [Amps] More on "baby ur radio"

To: "Bill Turner" <>, "Amps group" <>
Subject: Re: [Amps] More on "baby ur radio"
From: "Jeff AC0C" <>
Date: Sun, 20 Dec 2015 23:28:11 -0600
List-post: <">>

My experience was with logic parts (74xx and CD4xxx series variants and the follow-on families), not with discrete power devices and the characteristics may be different. However for the logic stuff, the failure rates are high in the first few hours of operation, then drop to some pretty amazingly low value for a very long time (equal to tens of years) and then final death.

The problem is that the "wear out" if you want to call it that is so far out that it's generally considered a given that the gear will be obsolete or some quality defect (eventual corrosion ingress to the package) or external event (voltage spike,etc) will before any wear mechanism kills the part.


-----Original Message----- From: Bill Turner
Sent: Saturday, December 19, 2015 11:52 PM
To: Amps group
Subject: Re: [Amps] More on "baby ur radio"

------------ 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."


So, absent migration, do transistors "wear out"?

73, Bill W6WRT
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