[time-nuts] Subject: Re: Meter face for HP-4805A

Greg Burnett gbusg at comcast.net
Tue Oct 12 16:16:47 EDT 2010


P.S. There's a better description (in an article by Bernie Oliver) at:
http://www.hpl.hp.com/hpjournal/pdfs/IssuePDFs/1961-03.pdf

Greg

----- Original Message ----- 
From: "Greg Burnett" <gbusg at comcast.net>
To: "Discussion of precise time and frequency measurement" 
<time-nuts at febo.com>
Sent: Tuesday, October 12, 2010 2:07 PM
Subject: Re: [time-nuts] Subject: Re: Meter face for HP-4805A


Yeah, I remember from the "good old days", we individually calibrated
taut-band meter movements with a HP designed servo-meter calibrator. At
least that's the way we did it for some models. I don't guarantee we did it
that way for all models, though.

The way I remember it, this process (regardless of which division's
instrument was involved) was performed at HP Loveland.

Disclaimer: My memory might be slightly skewed after all these decades.

For description of the taut-band meter movement calibration, see the HP
Journal article at:
http://www.hpl.hp.com/hpjournal/pdfs/IssuePDFs/1966-01.pdf

I do agree with the other post, though, that *any* saved/scanned scale is
way better than no (or a damaged) scale. In many cases probably a randomly
scanned scale would match a given meter movement good enough for most our
purposes.

Greg

----- Original Message ----- 
From: <gsteinba52 at aol.com>
To: <time-nuts at febo.com>
Sent: Tuesday, October 12, 2010 9:11 AM
Subject: [time-nuts] Subject: Re: Meter face for HP-4805A


         Just a quick note...

HP was quite proud that scales for their precision meters were individually
produced
for each movement on a custom made servo controlled photographic calibrator.

An archive might be nice but won't provide the meter accuracy of the
originals produced
for each unit.

Jerry

.


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