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 Post subject: Any calculator collectors out there?
PostPosted: Sep Fri 03, 2021 12:23 am 
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Joined: Jan Thu 01, 1970 1:00 am
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Location: Sandusky, OH usa
Just wondering as I ran into a few I had stashed and it made me wonder. What is your favorite one?

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 Post subject: Re: Any calculator collectors out there?
PostPosted: Sep Fri 03, 2021 12:32 am 
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Location: Mountains of Mourne. Ireland.
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:) Greg.


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 Post subject: Re: Any calculator collectors out there?
PostPosted: Sep Fri 03, 2021 12:45 am 
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egg wrote:
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:) Greg.

Why.... am.... I.... NOT.... surprised!!!

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 Post subject: Re: Any calculator collectors out there?
PostPosted: Sep Fri 03, 2021 12:46 am 
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Location: Sandusky, OH usa
Great Greg!

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 Post subject: Re: Any calculator collectors out there?
PostPosted: Sep Fri 03, 2021 1:40 am 
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Joined: Jun Wed 08, 2011 2:33 am
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Location: Ohio 45177
The place I worked at used HP calculators for aircraft weight and balance because they were programmable and had a printer port. I think they bought out the entire HP inventory of that model and we serviced them best we could for many years. Usually by combining parts of broken ones to make a good one. Or gave up and got a new in box one from stock. I should have worked out a way to get a good one as I think that model is now collectible. Had tons of the battery packs and I saved and adapted a few of those for other purposes. I think you got to go back to the 70s to get the really collectible types? They had an optical port on the back that we used to load in the programming on a special docking station. Then you had to run some tests to see if it was programmed right.

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 Post subject: Re: Any calculator collectors out there?
PostPosted: Sep Fri 03, 2021 1:55 am 
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Joined: Jan Fri 17, 2014 7:26 am
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Location: In the village, 19115
I have some nixie desktop ones. I also like the ones that start counting when you divide by zero. A dead giveaway is that they have no leading zero suppression. I have a few that the display goes blank, also. Pressing the clear key brings it back to normal, except one, I have to shut it off to restore it! :shock:

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I like things that light up, tubes, bulbs, LEDs, whatever, and things that make noise.


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 Post subject: Re: Any calculator collectors out there?
PostPosted: Sep Fri 03, 2021 2:39 am 
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Joined: Jan Thu 01, 1970 1:00 am
Posts: 1364
Location: Detroit, Michigan
I have a somewhat interest in these. Several LED ones, a Burroughs mechanical comptometer, a Singer-Friden nixie model, a Singer-Friden crt model, and a couple of abacuses I'm trying to learn. My biggest use for these is balancing the checkbook, in fact they are the only reason I still do that.

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 Post subject: Re: Any calculator collectors out there?
PostPosted: Sep Fri 03, 2021 2:41 am 
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I still use this Sears LC87 calculator which I purchased around 1981, and it's probably quite rare now. Actually, it's a Sears Model 711.58321.


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 Post subject: Re: Any calculator collectors out there?
PostPosted: Sep Fri 03, 2021 3:40 am 
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Location: Texas
I'm a sucker for those with VFD displays and mechanical keys. Sharp made a lot of them. Early Sharps had unusual and rare today display types, now selling on eBay in the $400-500 range.


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 Post subject: Re: Any calculator collectors out there?
PostPosted: Sep Fri 03, 2021 4:14 pm 
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Joined: Jan Thu 01, 1970 1:00 am
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Location: Pasadena CA USA
I have a small collection of HP calculators.


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 Post subject: Re: Any calculator collectors out there?
PostPosted: Sep Fri 03, 2021 4:33 pm 
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Location: alameda,CA
I don't but I found this in a box on the side of the road yesterday. It was STILL sealed in plastic AND somehow the battery was still good! I don't think its worth that much.


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 Post subject: Re: Any calculator collectors out there?
PostPosted: Sep Fri 03, 2021 4:46 pm 
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bobwilson1977 wrote:
I don't but I found this in a box on the side of the road yesterday. It was STILL sealed in plastic AND somehow the battery was still good! I don't think its worth that much.




Does it still work?


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 Post subject: Re: Any calculator collectors out there?
PostPosted: Sep Fri 03, 2021 4:57 pm 
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This abacus was given to me (perhaps as a Christmas present) sometime back in the 1980's, but I never used it though. It's a 'Lotus-Flower Brand' which was manufactured in 'The Peoples Republic Of China', and it appears that the person paid $2.99 for it at the time.


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Last edited by Blustar1 on Sep Fri 03, 2021 5:04 pm, edited 1 time in total.
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 Post subject: Re: Any calculator collectors out there?
PostPosted: Sep Fri 03, 2021 4:58 pm 
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Joined: May Mon 18, 2009 5:55 pm
Posts: 3076
Location: Erie, PA
I'm a fairly avid vintage calculator collector. My two flagships are a fully functional Wang 320SE with 4 keyboard/displays, and a fully working Friden EC-130.

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-Mark-

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 Post subject: Re: Any calculator collectors out there?
PostPosted: Sep Fri 03, 2021 5:22 pm 
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Joined: Nov Sun 29, 2020 5:59 pm
Posts: 279
Location: Northeast Illinois 60188
Here's a crossover piece from my radio-calculator collection.
It's the Sharp RADIPUTER 610 Clock Radio/Calculator combo!
It sports direct frequency entry using the calculator keypad in addition to station presets and a pull-out rod antenna.


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 Post subject: Re: Any calculator collectors out there?
PostPosted: Sep Fri 03, 2021 9:09 pm 
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Joined: Mar Tue 30, 2010 2:24 am
Posts: 9141
Location: Lehighton, PA.
Here's my 1977 TI-1000.

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TI-1000-2s.jpg
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Larry

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 Post subject: Re: Any calculator collectors out there?
PostPosted: Sep Fri 03, 2021 10:08 pm 
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Joined: Jun Sun 15, 2014 5:37 pm
Posts: 1388
Location: Montreal, Quebec
In 1977, I got a TI-30, a scientific calculator for under fifty dollars (I think it was $30) that had morefunctions than the HP-35 (though not RPN).

My first calculator was 4 function, for about ten dollars as surplus,the fall of 1974 or maybe75.

I schemed about getting fifty dollars to get a TI earlier than the TI-30, sent some circuits to Electronic magazine, they paid fifty dollars for circuits printed in their Designer's Notebook or whatever.

I got a TI digital LED watch around that time, they dropped price very fast.

In the nineties, I wasd finding older calculators cheap at garage sales. A TI-58 (the one without the cardreader), complete with the printer. A few HPs, a few early TIs, all scientific.

I always wanted the TI Programmer from the later seventies, able to operate on hex, binary and octal. The Casio LCD calculator I got in the mid-eighties did that along with scientific functions, but not logical operations. Now many a cheap calculator, with hundreds of functions, include those logical operstions.


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 Post subject: Re: Any calculator collectors out there?
PostPosted: Sep Fri 03, 2021 11:01 pm 
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Joined: Feb Fri 22, 2008 3:28 am
Posts: 606
The picture of the Wang calculator brings back memories. One of the math teachers at my high school had a friend that worked for a local defense contractor; he loaned one of the companies Wang calculators to the school for a week. No one had ever seen a calculator like it. As I recall, there was a display unit that connected to a small suitcase that sat on the floor. There was also what looked like an 8-track tape that plugged into the display unit, possibly used for programming. Keys felt like microswitches; definitely a "mechanical" keyboard. I think it had nixie tubes.


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 Post subject: Re: Any calculator collectors out there?
PostPosted: Sep Sat 04, 2021 1:55 am 
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Joined: Aug Wed 24, 2011 4:35 am
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Location: Sunnyvale CA
Not on purpose, but I have what might be an HP Calculator museum in my desk at work. Same drawer as the slide rules...

Brett


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 Post subject: Re: Any calculator collectors out there?
PostPosted: Sep Sat 04, 2021 2:07 am 
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Joined: May Mon 18, 2009 5:55 pm
Posts: 3076
Location: Erie, PA
CurtisL wrote:
The picture of the Wang calculator brings back memories. One of the math teachers at my high school had a friend that worked for a local defense contractor; he loaned one of the companies Wang calculators to the school for a week. No one had ever seen a calculator like it. As I recall, there was a display unit that connected to a small suitcase that sat on the floor. There was also what looked like an 8-track tape that plugged into the display unit, possibly used for programming. Keys felt like microswitches; definitely a "mechanical" keyboard. I think it had nixie tubes.


Your memory serves you correctly. My "SE" version has a processing unit containing 800+ mostly germanium transistors and a magnetic core memory that simultaneously operates up to 4 of the keyboard/displays in a round robin timeshare. I also have two of the punch card readers that added programmability. There were KB/displays that had magnetic tape program storage and all sorts of other peripherals including instrument controllers, printers, electronic memory, and even a hard drive. Many of these systems were used as part of the earliest CNC mills and lathes in industry.

"Electronic Package" processing unit
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Inside of electronic package with 32 circuit boards and 800+ transistors. No IC's were used in this system.
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View of one of the 320KT displays, this one has a trig sequencer that takes about 10 seconds to complete a trig function.


-Mark-


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