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Re: [Amps] Power Transistor Question -- 2SC5125

To: "Amps Amps" <amps@contesting.com>
Subject: Re: [Amps] Power Transistor Question -- 2SC5125
From: "Tom W8JI" <w8ji@w8ji.com>
Date: Mon, 19 Feb 2007 13:59:25 -0500
List-post: <mailto:amps@contesting.com>
> The figures I remember on semiconductor temperature and 
> reliability go something like this:
> 1.     Typical lifetime at junction temperature of 200 
> degC is somewhere in 10,000 hour range
> 2.    Lifetime doubles for each 10 degC drop in 
> temperature

I actually think it is a good thing when someone messes with 
a power limit control and blows up his radio.
Not a bad thing at all!!

It is a bad thing when he turns it up and the PA doesn't 
fail. Now that is sad for all of us.

73 Tom 


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