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References: [ +subject:/^(?:^\s*(re|sv|fwd|fw)[\[\]\d]*[:>-]+\s*)*\[Amps\]\s+More\s+on\s+\"baby\s+ur\s+radio\"\s*$/: 9 ]

Total 9 documents matching your query.

1. Re: [Amps] More on "baby ur radio" (score: 1)
Author: Bill Turner <dezrat@outlook.com>
Date: Fri, 18 Dec 2015 12:50:04 -0800
-- ORIGINAL MESSAGE --(may be snipped) REPLY: Good question. I heard years ago that over long periods of time some of the molecules in a transistor could "migrate" to undesired areas, so in that sens
/archives//html/Amps/2015-12/msg00033.html (7,594 bytes)

2. Re: [Amps] More on "baby ur radio" (score: 1)
Author: Pat <wa4tuk-rf@comcast.net>
Date: Fri, 18 Dec 2015 18:52:40 -0500
We are mostly in agreement. I don't have any footnotes or sources to cite; however, my perception is that receiving tubes run within ratings may easily exceed 10,000 hours or more useful service with
/archives//html/Amps/2015-12/msg00034.html (10,640 bytes)

3. Re: [Amps] More on "baby ur radio" (score: 1)
Author: "Jeff AC0C" <keepwalking188@ac0c.com>
Date: Sat, 19 Dec 2015 22:40:28 -0600
Migration is a real phenomenon but it's a quality defect, and not part of the normal operation. Google "purple plague." I am interested to see if there are any data specific to idle hours on a power
/archives//html/Amps/2015-12/msg00035.html (9,311 bytes)

4. Re: [Amps] More on "baby ur radio" (score: 1)
Author: Bill Turner <dezrat@outlook.com>
Date: Sat, 19 Dec 2015 21:52:15 -0800
-- ORIGINAL MESSAGE --(may be snipped) REPLY: So, absent migration, do transistors "wear out"? 73, Bill W6WRT _______________________________________________ Amps mailing list Amps@contesting.com htt
/archives//html/Amps/2015-12/msg00036.html (7,769 bytes)

5. Re: [Amps] More on "baby ur radio" (score: 1)
Author: "Cliff Frescura" <cf@cfcorp.com>
Date: Sun, 20 Dec 2015 21:05:31 -0800
Yes, because of tin whiskers. 73, Cliff K3LL -- ORIGINAL MESSAGE --(may be snipped) On Sat, 19 Dec 2015 22:40:28 -0600, you wrote: REPLY: So, absent migration, do transistors "wear out"? 73, Bill W6
/archives//html/Amps/2015-12/msg00038.html (8,846 bytes)

6. Re: [Amps] More on "baby ur radio" (score: 1)
Author: "Jeff AC0C" <keepwalking188@ac0c.com>
Date: Sun, 20 Dec 2015 23:28:11 -0600
Bill, 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
/archives//html/Amps/2015-12/msg00039.html (9,762 bytes)

7. Re: [Amps] More on "baby ur radio" (score: 1)
Author: Manfred Mornhinweg <manfred@ludens.cl>
Date: Mon, 21 Dec 2015 20:36:43 +0000
Bill, and all, So, absent migration, do transistors "wear out"? That's a rather philosophical question. One might argue that over the years there will be corrosion, radiation damage, who knows what e
/archives//html/Amps/2015-12/msg00044.html (10,969 bytes)

8. Re: [Amps] More on "baby ur radio" (score: 1)
Author: "Roger (K8RI)" <k8ri@rogerhalstead.com>
Date: Wed, 23 Dec 2015 20:05:13 -0500
Semiconductor device aging is not a yes or no question. To pick nits, Yes they all do, but at vastly different rate when used within their ratings. As has been noted, The certainly do last far longer
/archives//html/Amps/2015-12/msg00054.html (14,870 bytes)

9. Re: [Amps] More on "baby ur radio" (score: 1)
Author: "Roger (K8RI)" <k8ri@rogerhalstead.com>
Date: Wed, 23 Dec 2015 21:20:35 -0500
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 entire
/archives//html/Amps/2015-12/msg00056.html (9,732 bytes)

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