[volt-nuts] Keithley - and Tek gear
Marv Gozum @ JHN
marvin.gozum at jefferson.edu
Wed Nov 17 20:07:35 UTC 2010
Thanks Dick, that's priceless insight.
Can you explain the benefit of the ceramic jug over just plain glass?
At 02:50 PM 11/17/2010, Dick Moore wrote:
>On Nov 17, 2010, at 4:00 AM, volt-nuts-request at febo.com wrote:
> > Message: 1
> > Date: Tue, 16 Nov 2010 09:20:15 -0600
> > From: John Lofgren <jlofgren at lsr.com>
> > Subject: Re: [volt-nuts] Keithley 2001 - and Tek gear
> > To: Discussion of precise voltage measurement <volt-nuts at febo.com>
> > Message-ID:
> > <B1D0388E59D629408AB9FD22E3887B3B5B3C616367 at Exchange.lsr.local>
> > Content-Type: text/plain; charset="us-ascii"
> > Not to hijack a thread or get off topic, but that's why we love
> the older Tek gear. Their documentation was first rate. That
> voluminous and detailed documentation did come back to bite them, though.
> > I read story in " Winning with people: The first 40 years of
> Tektronix" about the Tek people discovering counterfeit scopes that
> the military (Navy?) was having built. As part of their contract
> to supply scopes they had to supply documentation that amounted to
> a detailed build manual for the product. Once the military
> customer had the documentation they shopped it around to contract
> manufacturers and found somebody who would build the scopes to
> print for, presumably, a lower price than the genuine Tek unit.
> > Looks like there is such a thing as too much information :)
> > -John
>It was a little more complicated -- When I started at Tek in 1961, I
>was told that in the 50's, during the Korean conflict, Tek had
>military contracts that stipulated that Tek had to allow other firms
>to build the mil-spec gear as a matter of national security. Lavoie
>Labs and Dumont built Tek scopes under these contracts, and then
>continued to build Tek scope clones for years afterward, on into the
>60's, most notably, clones of the 530 and 540 series, which had mil
>contract provisions on them. Tek of course had the ceramic terminal
>strips and the others didn't -- Tek made those ceramic strips themselves.
>Once PCBs became the basis of wiring, the ceramics plant was falling
>into disuse, so Tek decided to make ceramic CRT jugs. The problems
>that needed to be solved in getting the glass faceplates and the
>ceramic jugs to hold hard vacuum were immense. The fact that they
>did it is pretty amazing. Corning wasn't real pleased about the
>switch away from glass jugs. Anyway, doing business with the gummint
>can be profitable but a bit dangerous.
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