[Milsurplus] Research Help Requested

[Michael Bittner]

And how about, among other things, the acceptable characteristics of the 
6AK5 being variable up to +/- 65% ?

Mike, W6MAB


----- Original Message ----- 
From: "Kenneth G. Gordon" <kgordon2006 at frontier.com>
To: <Milsurplus at mailman.qth.net>
Sent: Monday, August 28, 2017 10:02 AM
Subject: Re: [Milsurplus] Research Help Requested


> I've been reading that PDF that someone here gave us a link to, the Henney 
> 1956 reliability
> report. I find it extremely interesting from several viewpoints and can 
> recommend it to any of
> us here.
>
> Apparently, no one who "mattered" was concerned in the least about 
> reliability of equipment
> during all of WWII, and it was only AFTER WWII that the reliability became 
> a serious issue.
>
> I was only somewhat surprised to learn that up to 60% of gear received by 
> the military was
> unusable as received, for any of several reasons, poor packing being a big 
> one.
>
> In one case, a piece of equipment had been tested at the factory to a 
> shock of 25 Gs, but
> when the stuff was shipped, the makers began receiving many reports of 
> defective gear
> upon receipt. A factory rep was dispatched to follow the gear from the 
> factory to its
> destination, and watched as the crate containing the gear was dumped off 
> the truck, 4 feet
> to a concrete floor. When the crate was opened, and a shock sensor was 
> examined, it was
> found that the gear suffered a shock of 35 Gs.
>
> Some things I found interesting was that something like 14% of aircraft 
> communications
> gear was affected, but that up to 84% of radar gear was affected.
>
> Believe me, those of us who are involved in safeguarding the remaining 
> WWII radio gear
> would do very well to read this entire paper. For one thing, it goes 
> heavily into the
> components used in our radio gear, and secondly makes some extremely 
> interesting
> suggestions concerning design.
>
> I intend to read it all, and more than once.
>
> Ken W7EKB
>
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