[time-nuts] HP 5071A Electron Multiplier of Cesium Beam Tube

Don Latham djl at montana.com
Mon Sep 7 05:58:00 UTC 2009

yet another reason not to buy a CS clock. What kind of self-destructive bs 
is this?

----- Original Message ----- 
From: "Rick Karlquist" <richard at karlquist.com>
To: "Discussion of precise time and frequency measurement" 
<time-nuts at febo.com>
Sent: Sunday, September 06, 2009 9:54 PM
Subject: Re: [time-nuts] HP 5071A Electron Multiplier of Cesium Beam Tube

> John Miles wrote:
>> Of course, you'd hear the same thing if you asked the modern-day HP if
>> they
>> could refurbish an inkjet cartridge. :)  Not the same thing, and not the
>> same company, I know... but still, HP had no incentive to try very hard 
>> to
>> develop a reconditioning process, at least before Datum started selling
>> replacement tubes.
> Wait a minute.  Datum owns Symmetricom which bought HP/Agilent's
> CBT production line and admits that their tubes were never as
> good as HP/Agilent's tubes.  The 5071, as opposed to the 5061, has
> a ROM with a password in the CBT so that only OEM tubes will work.
> The password consists of a poem written by Len Cutler.  The poem is
> copyrighted so that it would be illegal for a competitor to simply
> reproduce it, according to Len.
> Rick Karlquist N6RK
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