News |
|
|
2019-05-13 Distractions of Modern Technology | |
Posted by Accutron |
|
Dayton Hamvention's third year in The Great Xenia Mud Flats starts this Friday. As usual we will be selling a wide range of technological inventory, including vintage test equipment, calculators, computers, video games, electronic components, technical books and other various and sundry items. We can be found in our normal location at the exact geographical center of Hamvention, outdoor flea market spaces 7414-7417 and 7514-7517. |
2018-10-23 October Surprise | |
Posted by Accutron |
|
Another random assortment of new devices have been added to the museum: the Pickett N3-T power log exponential slide rule, a Western Electric 2N110 point contact transistor and a scarce Western Electric acrylic key tag which contains two uncompleted 10-pin monolithic ICs. |
2018-07-23 Gunpowder, Dynamite & Whisky | |
Posted by Accutron |
|
We have added several completely unrelated items to the museum: the collectible and sought-after APF Mark 55 RPN scientific calculator, two UNIVAC circuit cards believed to be from the CP-642 military computer, and a very early Westinghouse Style 35241 Precision Wattmeter. |
2018-05-21 Dog Days | |
Posted by Accutron |
|
Dayton Hamvention's second year in Xenia has come and gone. Although the mud situation was somewhat ameliorated by an insufficient application of pulverized asphalt, the rain was as persistent as it was in 2017, and made its annual encouragement to move Hamvention to a different time of year. |
2018-05-13 That's Not a Slide Rule | |
Posted by Accutron |
|
After months of preparation, we are finally approaching Dayton Hamvention 2018. We will once again have our huge selection of vintage computers, calculators, test equipment, typewriters, video games, scientific instruments, electronic components, technical books and many other items available for purchase. Our booth can be found in the same location as last year: outdoor flea market spaces 7414-7419 and 7514-7519, Hamvention's exact geographical center. |
2018-02-14 Masters of Science Nonfiction | |
Posted by Accutron |
|
We have procured an example of the Knowm BS-AF-W, the world's first commercially available memristor. Although the BS-AF-W is neither old nor a true digital device, its preordained historical importance and potential significance to the computing industry have earned it a place in our Digital Integrated Circuits exhibit. |
2018-01-19 Squaring the Circle | |
Posted by Accutron |
|
Just in time to supplant our last great quest for arcane knowledge, we have obtained two different part numbers of a newly discovered and completely unidentified type of Western Electric ICP, the F56976 and F56980. These devices resemble the 'conventional' ICPs developed for the Nike-X program, but have 16 pins arranged in a square configuration. In addition to these unique ICs, two new Western Electric transistors have been added to the Discrete Semiconductors exhibit: the rare 3N22 tetrode transistor and the 7B alloy junction transistor. |
2017-12-21 Crystal Unit, Amplifying | |
Posted by Accutron |
|
We have added three new Western Electric germanium alloy junction power transistors to the Discrete Semiconductors exhibit: the 2N66, GA-53242 and 9A. Both the 2N66 and GA-53242 are close relatives of the recently added GA-52830, sharing similar intermediate-power characteristics and a proprietary canister outline derived from the original Bell Telephone Labs M1777 experimental alloy junction transistor. The 9A is a later device, rated at a substantially increased 30W dissipation. We have also obtained an example of the heretofore undocumented Bell Telephone Labs A-2277, a developmental transistor in a TO-38 package. |
2017-12-02 The Grand Correction | |
Posted by Accutron |
|
For nearly 10 years, we have been attempting to research the history of the so-called Western Electric SAGE hybrid logic ICs, part number series GF401xx and 112946xx. Although the Smithsonian had long ago published an anecdote which claims these devices are from the "processor of the SAGE system", this statement never really matched the reality of the AN/FSQ-7 Central Computer System, a tremendously large tube-based machine built by IBM. After years of dead-end research and much speculation, the true origin of these devices has finally been discovered. They are discrete logic Integrated Circuit Packages (ICPs) developed for the experimental Bell/UNIVAC DPS-1 and DPS-2 defense computers. The DPS-1 and DPS-2 were incredibly powerful real-time multiprocessor supercomputers used to guide the operations of the Nike-X and Sentinel anti-ballistic missile systems. The article for these devices has been rewritten accordingly. We would like to give special thanks to retired UNIVAC component engineer Larry Bolton for his assistance in this research effort. |
2017-08-23 Totality | |
Posted by Accutron |
|
We have just returned from Sparta, Tennessee, a prime viewing location for the Great American Eclipse. Our site was a gravel turnaround along Rt. 136, about 350m north of the eclipse centerline. There were a few puffy clouds that gave us some concern, but the sky was completely clear for the main event. I managed to capture sunspots right after C1, and I got some good photos of totality, complete with streamers and prominences. I also discovered that autofocus is not fond of the diamond ring effect. The photographs were captured freehand with my Canon Powershot SX530HS, and I used a piece of gold-plated #12 welding glass as a filter during the partial phase. We experienced 2m 39.4s of totality, only a couple seconds shy of the absolute maximum at Hopkinsville, Kentucky. |
2017-07-05 Deposed Ruler | |
Posted by Accutron |
|
We are pleased to announce the addition of our new Slide Rules exhibit, which currently includes over a dozen devices from a range of different manufacturers. Prior to the introduction of the handheld scientific calculator in 1972, slide rules were the only portable calculation device capable of performing complex functions, making them an essential tool for scientists and engineers. Although slide rule production ceased over 40 years ago, they remain useful calculating devices with a significant user base. |
2017-06-14 Additions | |
Posted by Accutron |
|
Two new Mechanical Calculators have been added to the museum: a Smith-Corona Marchant 700-XN electric ten-key adding machine from the early 1970s, and the Paul Bruning Resulta-9, a tiny rotary disc adding machine with direct subtraction. We have also documented two new optoelectronic devices: the National Semiconductors NSL-881 silicon photodiode, and a rare Integrated Photomatrix IPL4064 64x1 photodiode array. |
2017-05-30 A Clockwork Grey | |
Posted by Accutron |
|
A number of new items have been added to the museum, among them our newly acquired MITE AN/UGC-41 military teletypewriter. The UGC-41 has an incredibly compact and elaborate teleprinter mechanism which resembles both a brass clock movement and a car engine. |
2017-05-21 Jaynestown | |
Posted by Accutron |
|
Dayton Hamvention has once again reached its conclusion. Despite the fact that the flea market transformed itself into a disgusting swamp of sentient, prehensile mud by noon on Saturday, we managed to purchase a number of impressive new items for the museum. Particularly noteworthy finds include a MITE AN/UGC-41 compact teletypewriter, several new pieces of HP test equipment, a Dana 8010B Electronic Counter and a number of unusual vacuum tubes. Many of these new devices will be added to the museum in the upcoming weeks. |
2017-05-12 The New Nexus of Awesome | |
Posted by Accutron |
|
Dayton Hamvention 2017 starts next Friday in its new venue at the Greene County Fairgrounds & Expo Center in Xenia, Ohio. Our booth is located at Hamvention's exact geographical center, spaces 7414-7419 and 7514-7519 in the west section of the main flea market area. Inventory is even larger than it was last year, with a massive quantity of computers, calculators, electronic components, test equipment, typewriters, scientific apparatus, video games, technical books and other items too numerous to mention. |
2017-05-03 Modem of Death | |
Posted by Accutron |
|
We have added two early laptops to the Digital Computer Equipment exhibit: the NEC PC-8201a and Epson PX-8 Geneva. In addition to these machines, an entry has been added for the Bell System Dataphone 9600, the world's deadliest modem. Weighing over 20kg, one might assume its preferred method of killing was blunt force trauma, but a Dataphone 9600 did in fact poison a pregnant woman and her unborn child in 1983. |
2017-04-15 The Typing of the Old | |
Posted by Accutron |
|
The new Typewriters exhibit is starting to look like an actual exhibit. There are now articles for the IBM Model B Executive, IBM Selectric, IBM Personal Wheelwriter 25, Olivetti Lettera 32 and Lettera 33, Olympia SM7 DeLuxe and Remington SR-101. We have also added new articles for the Burroughs Cash Machine, Mostek MK5017BA clock controller and the exceedingly rare Proton KIPD73A, a Soviet-manufactured green LED prototype in an unusual 12x12mm package. |
2017-03-24 Shoot the Core | |
Posted by Accutron |
|
We have added a number of interesting new items, mostly from a recent equipment donation: |
2017-03-15 Integrated | |
Posted by Accutron |
|
In the past week, the Digital Integrated Circuits exhibit has received the same treatment as other recently rehabilitated sections, with over 100 new photographs, a number of new IC devices and other content improvements. We have also added four calculators from the 1970s to the Electronic Calculators exhibit: the Commodore US-1, Eiko Unitrex 1200, Victor Comptometer 83-1421 and the matchbox-sized Casio Micro-Mini M-800. |
2017-03-07 Restoration | |
Posted by Accutron |
|
Our readers may have noticed some significant changes here recently. Three weeks ago, we migrated to new server hardware, and we are in the process of refurbishing the content of the entire website. Ultimately, every photograph which does not meet modern standards will be replaced. Many new items will be added, and a few will be removed, to reflect the current contents of our collection. This process is already well underway; all entries in
Mechanical Calculators,
Electronic Calculators,
Logic & Memory Circuits,
Integrated Optoelectronics,
Glow Transfer Counting Tubes,
Beam Switching Tubes,
Discrete Semiconductors,
Discrete Optoelectronics and
Microwave Amplifier & Oscillator Tubes
have been completely updated, and include about 60 new items in total. These new and refurbished entries can be easily identified by their larger thumbnails and non-shitty photographs. |
©2000-2019 The Vintage Technology Association. All rights reserved. |