[R-390] Paper on failure modes of mica capacitors (historical)

[Les Locklear]

Virtually all the "Hunt" branded capacitors in the Racal RA-17 series failed. I guess you call if the British version of the Black/Grey ladies of death that were in lots of different receivers, but mainly Hammarlund SP-600's.
 
Les


----- Original Message -----
From: Jim Whartenby via R-390 <r-390 at mailman.qth.net>
Reply-To: Jim Whartenby <old_radio at aol.com>
To: R-390 Mailing List <r-390 at mailman.qth.net>
Sent: 7/5/2024 1:40:15 AM
Subject: Re: [R-390] Paper on failure modes of mica capacitors (historical)
________________________________________________________________________________

> This paper is from Great Britain.  I am not sure that they manufactured 
> capacitors with the same materials and technique that the U.S. manufacturers 
> used.  When the Cold War was heating up in the early 1950's all of the U.S. component specs were rewritten to insure the best manufacturing practice for increased reliability.  I am not sure what happened on the other side of the "pond" in this respect.  It seems to me that the vast majority of the component issues were solved in the U.S. by the mid to late 1950s which was when this paper was published.
> Perhaps some of our fellow R-390 owners in Great Britain can comment?Regards,Jim
> Logic: Method used to arrive at the wrong conclusion, with confidence.  Murphy 
> 
>     On Thursday, July 4, 2024 at 04:06:45 PM CDT, jkharvie via R-390 <r-
> 390 at mailman.qth.net> wrote:   
> 
>  As attached
> cheers
> John N3JKE
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