[Amps] Carbon resistor value change

[Carl]

----- Original Message ----- 
From: "Bill, W6WRT" <dezrat1242 at yahoo.com>
To: "amps" <amps at contesting.com>
Sent: Friday, April 09, 2010 3:00 AM
Subject: Re: [Amps] pi-net spreadsheet question


> ORIGINAL MESSAGE:
>
> On Fri, 09 Apr 2010 03:18:24 +0000, Ron Youvan
> <ka4inm at tampabay.rr.com> wrote:
>
>>
>>   I can not follow this tread to it's originator, but:
>>   I had a sub-assembly fail a week or two ago and the problem was a 39 k 
>> Ohm 2 Watt resistor (one
>>of two) had burned it's self DOWN to 30.09 OHMS and the increased current 
>>burnt up a 470 Ohm at 2
>>Watt resistor.  The other 39 k Ohm 2 Watt resistor was not so effected.
>>   The 39 k Ohm 2 Watt resistors and a 1 k Ohm 1/2 Watt resistor (for 
>> each) drop (+ and -) 170 Volt
>>supplies (divide by 40) into a comparator (each) and detect power supply 
>>failures.
>>In operation since May 2002.
>
> REPLY:
>
> It is well known that resistors can and do decrease value, but for
> some reason Carl said they do not. I'm still waiting for an
> explanation from him.
>
> 73, Bill W6WRT


Show me where I said positively that they do not???

Carl