Re: HP 7970B Capstan?

On 09/06/2017 08:14 PM, Al Kossow via cctalk wrote: > I could mail you a skew tape. > > On 9/6/17 8:09 PM, Chuck Guzis via cctalk wrote: > >> I'm just scratching around looking for ideas. If you could spare it for a week or so, I'd be grateful. On the other hand, my MCU setup for the drive

Re: HP 7970B Capstan?

I could mail you a skew tape. On 9/6/17 8:09 PM, Chuck Guzis via cctalk wrote: > I'm just scratching around looking for ideas.

Re: HP 7970B Capstan?

On 09/06/2017 06:50 PM, Jon Elson wrote: > On 09/06/2017 12:11 PM, Chuck Guzis via cctalk wrote: >> Will do--I've mentioned in another message that I'm preparing a test >> tape using the drive, so I should get some inkling of timing and >> adjustments pretty quickly. --Chuck > While that is good,

Re: HP 7970B Capstan?

On 09/06/2017 06:50 PM, Jon Elson wrote: > On 09/06/2017 12:11 PM, Chuck Guzis via cctalk wrote: >> Will do--I've mentioned in another message that I'm preparing a test >> tape using the drive, so I should get some inkling of timing and >> adjustments pretty quickly. --Chuck > While that is good,

Re: determing date on TI 99/4 computers.

http://www.computinghistory.org.uk/det/1344/Texas-Instruments-TI-99-4A/ has interesting knowledge of the serial for dating.  I don't know if it was my newb brain/false memory but i thought I saw someone post a ti-99/2 prototype before (vcfed search can probably prove me right or wrong). But the

Re: HP 7970B Capstan?

On 09/06/2017 12:11 PM, Chuck Guzis via cctalk wrote: Will do--I've mentioned in another message that I'm preparing a test tape using the drive, so I should get some inkling of timing and adjustments pretty quickly. --Chuck While that is good, an all-ones test tape made on ANOTHER drive that

Re: Xerox Alto Chordset Pictures (was RE: VCF?)

Steve, Now that you see the shape in detail, feel free to ask for the specific dimensions you'll need as you go along. I'll take the caliper out and make precise measurements. Marc On Sep 6, 2017, at 1:00 AM, Steve Malikoff via cctalk wrote: >> Steve, >> >> Here you

Re: determing date on TI 99/4 computers.

On Wed, Sep 06, 2017 at 02:07:22PM -0400, william degnan via cctech wrote: >I'd double check that. I have found, at least in my experience, that the >beige are more plentiful than what you'd expect if they only made them for >a few months. I bet they were made for the last year or more of the

Re: determing date on TI 99/4 computers.

* Black and chrome, chiclet keyboard - TI-99/4, the first TI home computer (1979). * Black and chrome, typewriter keyboard - TI-99/4A, the revised version of the above (1981). * Beige, typewriter keyboard - TI-99/4A, cost-reduced version of the above (1983). Manufactured for only a few

Re: determing date on TI 99/4 computers.

> > * Beige, typewriter keyboard - TI-99/4A, cost-reduced version of the > above (1983). Manufactured for only a few months before > discontinuation in late 1983. > I'd double check that. I have found, at least in my experience, that the beige are more plentiful than what you'd expect if

Re: Computers before Information Theory

On 2017-Sep-06, at 11:03 AM, Paul Koning via cctalk wrote: >> On Sep 6, 2017, at 1:25 PM, Fred Jan Kraan via cctalk >> wrote: >> >> While reading a biography of Claude Shannon, I try to get a picture how >> computers were seen and used before Information Theory emerged.

Scavenging higher-end models (Was: Re: determing date on TI 99/4 computers.)

On Sep 6, 2017, at 10:45 AM, Liam Proven via cctalk wrote: > It shows what the machine could have been, if TI hadn't crippled it > for fear of competing with its higher-end models. I have heard similar arguments repeatedly, in reference to systems from multiple

Re: Computers before Information Theory

> On Sep 6, 2017, at 1:25 PM, Fred Jan Kraan via cctalk > wrote: > > While reading a biography of Claude Shannon, I try to get a picture how > computers were seen and used before Information Theory emerged. It might be > something like this: > > Before Information

Computers before Information Theory

While reading a biography of Claude Shannon, I try to get a picture how computers were seen and used before Information Theory emerged. It might be something like this: Before Information Theory, computers were mainly calculators; processing programs from numbers put into the machine, much

Re: HP 7970B Capstan?

On 09/06/2017 09:41 AM, Jon Elson via cctalk wrote: > On 09/06/2017 11:03 AM, Al Kossow via cctalk wrote: >> >> On 9/5/17 11:09 PM, Chuck Guzis via cctalk wrote: >> >>> The read results have improved considerably. >> tension arm servo acting reasonably? >> >> what style arm sensor does your drive

Re: HP 7970B Capstan?

On 09/06/2017 11:03 AM, Al Kossow via cctalk wrote: On 9/5/17 11:09 PM, Chuck Guzis via cctalk wrote: The read results have improved considerably. tension arm servo acting reasonably? what style arm sensor does your drive have? OK, so one of the first checks is to put a scope on the

Re: HP 7970B Capstan?

On 9/5/17 11:09 PM, Chuck Guzis via cctalk wrote: > The read results have improved considerably. tension arm servo acting reasonably? what style arm sensor does your drive have?

Re: determing date on TI 99/4 computers.

On Wed, Sep 6, 2017 at 10:45 AM, Liam Proven via cctalk < cctalk@classiccmp.org> wrote: > On 6 September 2017 at 16:55, Geoffrey Oltmans via cctalk > wrote: > > > There's a pretty good article about TI's home computers that I've been > > trying to find that lays out a

Re: determing date on TI 99/4 computers.

On 6 September 2017 at 16:55, Geoffrey Oltmans via cctalk wrote: > There's a pretty good article about TI's home computers that I've been > trying to find that lays out a pretty convincing argument for why the 4A > was not successful in the market despite early success.

Re: EBAY - DEC RX01/02 floppy disks - Andromeda Systems and AED utilities

I am in the UK and I have bid for these today and will image them if I win them. Mark On 6 Sep 2017, at 15:11, N0body H0me via cctalk wrote: >> -Original Message- >> From: cctalk@classiccmp.org >> Sent: Wed, 6 Sep 2017 08:37:58 +0200 >> To: cctalk@classiccmp.org

Re: Odd Ebay auction showed up today...

The seller is in business. Old computers seem to be the target. They do not seem to have much computer knowledge. They seem to be a member of VCF and such as a business would be that sells such items. anyone can be a member They periodically change their seller name. They don't seem to be

Re: determing date on TI 99/4 computers.

Depends on if you're talking about the 99/4 or 99/4A. The 99/4 was black and silver and had a chiclet style keyboard and is rare. The 4A had a black and silver finish first, and then later switched to beige I imagine in an effort to curb costs since they were being undercut pretty badly by

NEC D2246 SMD Disk Drives on ebay , brand new sealed old stock

Maybe someone is interested. http://www.ebay.com/itm/NEC-D2246-8-0-FHT-SMD-DISK-DRIVE-UN-TESTED-NEW-OLD-S TOCK-RARE-VINTAGE-/253049784698 apparently new old stock, sealed, and in quantity (I'm not related)

RE: EBAY - DEC RX01/02 floppy disks - Andromeda Systems and AED utilities

> -Original Message- > From: cctalk@classiccmp.org > Sent: Wed, 6 Sep 2017 08:37:58 +0200 > To: cctalk@classiccmp.org > Subject: EBAY - DEC RX01/02 floppy disks - Andromeda Systems and AED > utilities > > Someone in the UK is selling a lot of floppy disks (shipping to UK only). > Labels

RE: HP 7970B Capstan?

> -Oorspronkelijk bericht- > Van: cctalk [mailto:cctalk-boun...@classiccmp.org] Namens Chuck Guzis via > cctalk > Verzonden: woensdag 6 september 2017 8:09 > Aan: CCtalk > Onderwerp: Re: HP 7970B Capstan? > > On 09/05/2017 10:47 PM, David Collins wrote: > > From

Re: Xerox Alto Chordset Pictures (was RE: VCF?)

> Steve, > > Here you go, 13 pictures of the Chordset. That's about as orthoscopic as I > could get them. > https://www.dropbox.com/sh/owjnyvozp0t8wsg/AABlwP-q-S1pOM4a9_RVAsXVa?dl=0 > Note that even the piano keys are not flat pieces, they are wedges that > thicken towards the back. Way more

Re: determing date on TI 99/4 computers.

In a message dated 9/5/2017 11:27:04 P.M. US Mountain Standard Time, p...@mactec.com.au writes: Hi Ed Howdy! Did you do any research on this at all? Not a lot found a few conflicting things The beige one was later. Thanks -

EBAY - DEC RX01/02 floppy disks - Andromeda Systems and AED utilities

Someone in the UK is selling a lot of floppy disks (shipping to UK only). Labels mentions "Andromeda Systems WDLT DL/DY Utilities", "WDC11 support disk" and "Advanced Electronic Design WINC-05/8" Unless this type of software isn't already imaged and saved it might be useful if someone in the UK

Re: determing date on TI 99/4 computers.

Hi Ed Did you do any research on this at all? The beige one was later. https://en.wikipedia.org/wiki/Texas_Instruments_TI-99/4A Bill Cosby was their spokesperson. I can scan the advertising stuff that I have, but I’m pretty sure that it is all online somewhere. > On 6 Sep 2017, at 4:00

Re: HP 7970B Capstan?

On 09/05/2017 10:47 PM, David Collins wrote: > From my old HP CE days you could always get black off the capstan if > you used alcohol or similar (never recommended). The key thing is it > shouldn't be sticky/gooey. I noticed the issue by starting a read from load point and observing that the bit

determing date on TI 99/4 computers.

There is a white or beige one then there is the black and chrome one? which first? and dates please? This is unfamiliar territory for me. but need to pay homage to these in a museum display here. looking for good hi res scans of adv. material etc. for display?? thanks ed#