[R-390] AB Ohmite resistors

rbethman rbethman at comcast.net
Fri Feb 18 16:02:51 EST 2011


Ben,

The first suggestion would be to take a "random" sampling to see how the 
values have held up.

I had a bunch like that, even in their original metal box and drawer.

I found that time was NOT their friend!

I've since procured a fair collection of the "newer" metal film type.  I 
do random checks, and have yet to find one out of spec.

Since rolling around an R-390A or SP-600 isn't the easiest thing for a 
60 plus year old, I've taken to the use of the more modern components!

Bob - N0DGN

On 2/18/2011 3:43 PM, Ben Loper wrote:
> While working on my 75A-2 I cam across a source of NOS Allen Bradley and
> Ohmite carbon composition resistors.  1/4 1/2 1 and 2 watts sizes.  I was
> putting my list together for what I might need and I wondered if anyone
> needed some.  The ones I saw are all unused in packages.  Ii haven't had a
> chance to go through all of them, but if there are some frequently used or
> sizes someone needs send me your list.  These are the older style and again
> completely unused.
>



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