I'm excited to hear about this, the work begun on these Univac units. Vacuum tube computers are scarce, they are before my time but intriguing to me. The capstan problem is typical of any device that handles tape, either magnetic or paper. I have a number of devices with melted capstans. My casual knowledge of other's work, is to either find a similar rubber capstan and transfer the rubber (Bill Degnan suggested this also); or to mill out (as in milling machine) a chunk of rubber to fit. So I'd like to hear about any resolution for this rubber capstan problem. So I'd like my keep an ear on this Univac project for a number of reasons. Herb -- Herbert R. Johnson, New Jersey USA http://www.retrotechnology.com OR .net
On 06/16/2016 03:34 PM, Herb Johnson via vcf-midatlantic wrote:
The capstan problem is typical of any device that handles tape, either magnetic or paper. I have a number of devices with melted capstans. My casual knowledge of other's work, is to either find a similar rubber capstan and transfer the rubber (Bill Degnan suggested this also); or to mill out (as in milling machine) a chunk of rubber to fit. So I'd like to hear about any resolution for this rubber capstan problem.
http://www.terrysrubberrollers.com/ -Dave -- Dave McGuire, AK4HZ New Kensington, PA
The UNIVAC 1219 is not vacuum tube. http://vintagecomputer.net/univac/1219/1219_Brochure.pdf -- @ BillDeg: Web: vintagecomputer.net Twitter: @billdeg <https://twitter.com/billdeg> Youtube: @billdeg <https://www.youtube.com/user/billdeg> Unauthorized Bio <http://www.vintagecomputer.net/readme.cfm>
Bill Degnan posts:
The UNIVAC 1219 is not vacuum tube [link to brochure]
Nice brochure, good description. The graphics would be informative for display. Dave McGuire posts: [link to custom rubber roller replacements] I've heard of this service. The order form suggests a price of $35 plus shipping with exchange, which is not awful. Herb -- Herbert R. Johnson, New Jersey USA http://www.retrotechnology.com OR .net
Yes, cool brochure for sure. Am I blind? I can't find any mention of the technology other than "digital". <https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=webmail&utm_term=oa-2322-a> Virus-free. www.avast.com <https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=webmail&utm_term=oa-2322-a> <#DDB4FAA8-2DD7-40BB-A1B8-4E2AA1F9FDF2>
but of course, wiki says transistor.
<https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=webmail&utm_term=oa-2322-a> Virus-free. www.avast.com <https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=webmail&utm_term=oa-2322-a> <#DDB4FAA8-2DD7-40BB-A1B8-4E2AA1F9FDF2>
The 1219 uses the same 15 pin cards as the CP-642 NTDS computer. These same cards used in the 1532 I/O console (OA-9784 or Mk. 77 Input-Output console) Which I scanned and uploaded to Bitsaver : http://bitsavers.informatik.uni-stuttgart.de/pdf//univac/military/1532/ My scan of the student study guide for the 1219 Not 1219B is Here : http://bitsavers.informatik.uni-stuttgart.de/pdf//univac/military/1219/ I think that the only difference is in the memory section. The 1219B memory has 10 pin UNIVAC custom DTL nand flatpack chips on 56 pin circuit cards. I always thought of it as a 2.5 generation computer. The original Manuals are at VCF More info on Univac 18 bit hardware Here: http://vipclubmn.org/cp18bit.html Link to my Univac Computer Yahoo! Group : https://groups.yahoo.com/neo/groups/UnivacComputers/info I have posted my 1219/1532 emulator, assembler and instructions to the group. Duane -----Original Message----- From: Evan Koblentz via vcf-midatlantic Sent: Thursday, June 16, 2016 6:52 PM To: vcf-midatlantic Cc: Evan Koblentz Subject: Re: [vcf-midatlantic] Univac, our first real work! Wikipedia is correct. Ours is a transitor Univac from the Sperry-Rand era.
On Jun 16, 2016, at 15:34, Herb Johnson via vcf-midatlantic <vcf-midatlantic@lists.vintagecomputerfederation.org> wrote:
I'm excited to hear about this, the work begun on these Univac units. Vacuum tube computers are scarce, they are before my time but intriguing to me.
As others have pointed out, our Univac is transistor-based (and probably not before your time, just somewhat out of your domain, unless you were in the Navy). Our Bendix G-15, however, is tube-based (and drum-based, which will probably be the bigger hurdle to getting it running). - Dave
participants (8)
-
Dave McGuire -
David Riley -
Douglas Crawford -
Duane -
Evan Koblentz -
Herb Johnson -
Martin A Flynn -
william degnan