[Boatanchors] Result of baking old resistors

[Yong Surk Lee]

As someone suggested, I tried baking the old resistors at about 150F for 60
minutes. I used a kitchen oven at 'WARM' position which I believe is about
150F or so. I tried  a batch of  4 resistors each time.  Result is that all
the resistors values went up even higher by about a few percent. No resistor
value went down. So if there is no further suggestion I may close down this
story of my resistors.  Thanks for you suggestions.

----- Original Message ----- 
From: "Yong Surk Lee" <yonglee at yonsei.ac.kr>
To: <tedm at xtra.co.nz>; <boatanchors at mailman.qth.net>
Sent: Wednesday, December 15, 2004 11:34 AM
Subject: Re: [Boatanchors] Old resistor values


> Thanks for your reply. So do you think the carbon comp resistors recently
> made are OK? I also have many resistors that I bought about 14 years ago.
> These  does not show significant change in values.
>
> ----- Original Message ----- 
> From: "Ted Minchin, ZL1MT." <tedm at xtra.co.nz>
> To: <boatanchors at mailman.qth.net>
> Sent: Wednesday, December 15, 2004 11:16 AM
> Subject: Re: [Boatanchors] Old resistor values
>
>
> > Yep, I have found that ALL the carbon comp resistors made in the 50's
and
> 60's increase resistance with age, used or not.... My view is that they
are
> pretty to look at but best not used!!
> > 73 de Ted
> > ZL1MT
> >
> > >
> > > From: "Yong Surk Lee" <yonglee at yonsei.ac.kr>
> > > Date: 2004/12/15 Wed PM 02:56:31 GMT+13:00
> > > To: <boatanchors at mailman.qth.net>
> > > Subject: [Boatanchors] Old resistor values
> > >
> > >
> > > I found thousands of NOS resistors ranging from 1ohm to a few megohms
at
> a
> > > local hamfest. I believe these were made by Ohmite in the 50s or 60s.
> These
> > > resistors are unused. Strangely measured values of most of these
> resistors
> > > are about 10-20% higher than color coded values. Most of these are
> 0.25-2
> > > watt and 5 or 10% tolerence resistors.
> > > Here is my question. Does the resistor values increase as time passes
> even
> > > if unused? Anybody experienced this?
> > >
> > >
> > >
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>