[time-nuts] HP 5360A History?

Jeremy Nichols jn6wfo at gmail.com
Thu Apr 14 03:05:40 UTC 2016


The second thing I learned to program was a 9100 calculator, very 
similar to the 5360's programming style and "language," RPN and all.

Jeremy


On 4/13/2016 6:27 PM, paul swed wrote:
> Amazing more then 2 people know what a 5360 is. More that they still work.
> I would say the most interesting thing that I did was measure the color
> subcarrier phase shift on Geo-synchrounous satellites. This represented the
> drift of the satellite. I knew the references only to well and they were
> Cesium at the origination site on the CBS network. I captured and processed
> the readings over many weeks and slowly but surely the expected orbital
> behaviors showed up.
> This was Xerox-820 and apple II time frame.
> I could easily see how you might expand what the system could do. Just no
> real need.
> So the 5360 is about as close as I will ever get to the HP calculators.
> Though I have looked for many years.
> Regards
> Paul
> WB8TSL
>
> On Wed, Apr 13, 2016 at 6:43 PM, Pete Lancashire <pete at petelancashire.com>
> wrote:
>
>> Tom
>>
>> Add to your list
>>
>>
>> http://www.hp.com/hpinfo/abouthp/histnfacts/publications/measure/pdf/1969_06.pdf
>>
>>
>>
>> On Wed, Apr 13, 2016 at 12:57 PM, Tom Van Baak <tvb at leapsecond.com> wrote:
>>
>>> John,
>>>
>>> I agree with Paul, an absolutely amazing instrument. The early models
>> have
>>> nixie display, later ones plasma. 11 digits! In 1969! It was the first hp
>>> instrument that was capable enough to compute stability statistics. In
>>> real-time! Like Paul I have a couple, along with various the accessories.
>>> Built like a tank, even the keyboard.
>>>
>>> You'll find mention of the counter in old technical articles, sometimes
>>> including the programs people would write for automated statistics. I've
>>> always thought the 5360 was uniquely at the cross-roads between hp as an
>>> instrument company and hp as a computer company (not to mention hp as a
>>> printer ink company). You can see the DNA of each of these in the 5360 &
>>> its accessories.
>>>
>>> You were probably reading this major 5360A Computing Counter issue:
>>>
>>> http://www.hpl.hp.com/hpjournal/pdfs/IssuePDFs/1969-05.pdf
>>>
>>> Here's all about the 5375A keyboard:
>>>
>>> http://www.hpl.hp.com/hpjournal/pdfs/IssuePDFs/1970-03.pdf
>>>
>>> And this is where the diode and punch card interface is shown, as well as
>>> ADEV from 1 us to 1 s (see page 4, fig 4).
>>>
>>> http://www.hpl.hp.com/hpjournal/pdfs/IssuePDFs/1970-12.pdf
>>>
>>> More on ADEV on the 5360:
>>>
>>> http://www.hpl.hp.com/hpjournal/pdfs/IssuePDFs/1971-11.pdf
>>>
>>> Select high-res page scans from my own hardcopy HPJ collection are here:
>>>
>>> http://www.leapsecond.com/hpj/
>>>
>>> For example, the 79-step ADEV program is here:
>>>
>>> http://www.leapsecond.com/hpj/v22n4/v22n4p10.jpg
>>>
>>> Finally, do not miss HP AN116 "Precision Frequency Measurements":
>>>
>>> http://www.hpmemoryproject.org/an/pdf/an_116.pdf
>>>
>>> /tvb
>>>
>>> ----- Original Message -----
>>> From: "John Ackermann N8UR" <jra at febo.com>
>>> To: <time-nuts at febo.com>
>>> Sent: Wednesday, April 13, 2016 9:38 AM
>>> Subject: [time-nuts] HP 5360A History?
>>>
>>>
>>>> I was browsing through the HP Journal archives and came across the May,
>>>> 1969 issue, dedicated to the new 5360A Computing Counter -- "An
>>>> Electronic Counter for the 1970s!"
>>>>
>>>> I don't recall hearing much about these in time-nuts lore.  I can guess
>>>> from the Journal articles that it was a beast to keep running and was
>>>> very expensive (500 ICs and a 10A 5V power supply).
>>>>
>>>> Is anyone here familiar with the story of this product?
>>>>
>>>> John
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