counter model number

Started by jimmyc, 04-06-2011 -- 14:53:44

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jimmyc

04-06-2011 -- 14:53:44
does anyone know the model number for the counter that has a waterfall type display where the 10 digits fall down and stop at the reading?  i think it was an HP.  The only place i ever saw one was at Hill and they were still calibrating them.

Hawaii596

#1
04-06-2011 -- 15:22:00
The only old one I can think of it the old HP 5245L that had the nixie tube displays.  It had the old type I case.  Not sure if that is it.  But that's my only guess.  I haven't heard the term "waterfall" in that context.  Maybe its an air force term.  You know us squids (Navy types).
"I often say that when you can measure what you are speaking about, and express it in numbers, you know something about it; but when you cannot measure it, when you cannot express it in numbers, your knowledge is of a meagre and unsatisfactory kind."
Lord Kelvin (1824-1907)
from lecture to the Institute of Civil Engineers, 3 May 1883

chinman

#2
04-06-2011 -- 15:38:48 Last Edit: 04-06-2011 -- 17:30:46 by chinman
Quote from: jimmyc on 04-06-2011 -- 14:53:44
does anyone know the model number for the counter that has a waterfall type display where the 10 digits fall down and stop at the reading?  i think it was an HP.  The only place i ever saw one was at Hill and they were still calibrating them.

It is probably the HP 521C.

www.hpl.hp.com/hpjournal/pdfs/IssuePDFs/1957-07.pdf

I saw one at Patrick about 20 years ago.

Hawaii596

#3
04-06-2011 -- 15:44:00
OOOOHhhhhhh.  I HAVE seen "waterfall" counters.  My dad was a ham radio operator and part of First Army MARS, and used to get old military surplus communications and test equipment.  He had some 60's vintage rack width "waterfall" type counter; although I have no recollection of the model.
"I often say that when you can measure what you are speaking about, and express it in numbers, you know something about it; but when you cannot measure it, when you cannot express it in numbers, your knowledge is of a meagre and unsatisfactory kind."
Lord Kelvin (1824-1907)
from lecture to the Institute of Civil Engineers, 3 May 1883

michthai

#4
04-07-2011 -- 07:24:04
HP 524

metrologygeek

#5
04-07-2011 -- 08:12:02
Yes, the 524. I worked on them at Elmendorf after I evacuated from Lowry and went to my first duty station.

michthai

#6
04-07-2011 -- 12:50:19
The theory/tubes used in them was/is called phantastron(s).

RFCAL

#7
04-07-2011 -- 13:27:10
525 and the 5245L did the same thing with the tubes that had the numbers inside them.
Can u figure out my age now?

jimmyc

#8
04-07-2011 -- 13:37:07
thanks everyone, i was trying to explain the display to someone and couldn't remember what the model was. 

OlDave

#9
04-07-2011 -- 16:14:00
Quote from: RFCAL on 04-07-2011 -- 13:27:10
525 and the 5245L did the same thing with the tubes that had the numbers inside them.
Those would be called nixie tubes.

yonker08

#10
04-08-2011 -- 10:50:54
In keeping with the train, what was the voltmeter that had 10 rows of plastic panels with the numbers etched in them. They were lit from below and clanked away till the measurement settled down. I think it was made by Dana.
Make no friendship with an angry man; and with a furious man thou shalt not go: Prov.22:24

acstd90

#11
04-30-2011 -- 23:04:35
Some of the meters were the NLS (Non Linear Systems) V series (V34, V35) and NLS 700 series
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