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

Brooke Clarke brooke95482 at att.net
Tue Oct 12 15:26:34 UTC 2010


Hi Jerry:

Is there an HP Journal or other article that goes into detail on how 
they did that?

Have Fun,

Brooke Clarke
http://www.PRC68.com


gsteinba52 at aol.com wrote:
>           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
>
>
> Message: 2  Date: Tue, 12 Oct 2010 09:29:19 -0400
> From: paul swed<paulswedb at gmail.com>
> Subject: Re: [time-nuts] Meter face for HP-4805A
> To: shalimr9 at gmail.com, Discussion of precise time and frequency measurement<time-nuts at febo.com>
> Didier,  Its subjective then. If its bad enough you take the risk because you do know  the process
> will degrade the scale. Essentially when its time to do it you  will. So the good news is this.
> With todays tools you can very accurately reproduce the meter scale. I scan them at 1200 dpi as
> I just did for the  dymec. I prefer bitmap over jpeg for storing them. Additionally with the
> various paint programs that seem to come on every pc today you can always fix issues pretty easily.
> Then print to your favorite material which most likely is a white picture material. (I like it
> because  its a bit thicker and more stable) Though good quality paper  is excellent also.
> Hmmm maybe we should send our meter scans to K4BB repository. Heck he has rom images.
> Regards Paul.
>
>
>
>
>
>
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>    

-- 
Have Fun,

Brooke Clarke
http://www.PRC68.com





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