[Boatanchors] Result of baking old resistors
ELDIM
eldim at att.net
Thu Dec 16 03:14:17 EST 2004
Let's try putting them in the freezer for a hour or so, or better yet if you
have some liquid nitrogen try dipping them in for a second or two being very
careful not to drop them when removed.
73,
And a Happy Safe Holiday to All.
Glen Galati, KA7BOJ
Tacoma, WA
eldim at worldnet.att.net
----- 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 11:46 PM
Subject: [Boatanchors] Result of baking old resistors
> 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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>
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