Maybe I need one of these power cords for my Monroe-Litton 1830 aka Compucorp 485. It might make the calculations more precise? ;)
Don Resor
Sent from someone's iPhone
> On May 6, 2024, at 8:55 PM, Chuck Guzis via cctalk <cctalk(a)classiccmp.org> wrote:
>
> On 5/6/24 20:25, Fred Cisin via cctalk wrote:
> https://www.ebay.com/itm/134706639303
>> include a basic feature for rewinding rental DVDs before returning them.
> Of course, you need a pure silver AC cable for those:
>
> https://www.ebay.com/itm/115970049389
>
> --Chuck
"November 19, 1974" is what is written on the "Date of Publication of This Issue" line in Copyright "Form B" (for periodicals) used at the time. The form then states "The copyright law defines the 'date of publication' as '. . . the earliest date when copies . . . were placed on sale, sold or publicly distributed." The form is then signed pursuant to 17 U.S.C. sec. 506(e), which provided for a substantial fine in the event that any false representation was made on the form.
There is no reason to doubt the date of publication in the notice. In fact, there is every reason to believe it is correct. In the magazine business it is a routine business practice to have actual publication occur months prior to the "cover date" the publisher places on the magazine. The reason for this is so that the magazines could remain on the newsstands for at least a few months without appearing to be stale. This is particularly the case with magazines published on a monthly cadence.
Just as a check, I looked up the publication date of the January 1975 issue of Playboy. According to the copyright registration, it was November 20, 1974.
> Date: Mon, 6 May 2024 01:27:28 +0000 (UTC)
> From: ED SHARPE <couryhouse(a)aol.com>
> Subject: [cctalk] Re: Altair 8800 50th birthday...
> To: "General Discussion: On-Topic and Off-Topic Posts"
> <cctalk(a)classiccmp.org>
> Cc: Sellam Abraham <sellam.ismail(a)gmail.com>
> Message-ID: <1726519925.3966543.1714958848839(a)mail.yahoo.com>
> Content-Type: text/plain; charset=UTF-8
>
> Perhaps After doing the layout work in the November it was perhaps
> copyrighted Immediately during layout But it did not ship Until January
> Think! back in those days things did not instantly happen and we're instantly
> shipped Ed#
>
> Sent from AOL on Android
>
> On Fri, May 3, 2024 at 7:09 AM, Sellam Abraham via
> cctalk<cctalk(a)classiccmp.org> wrote: On Fri, May 3, 2024, 1:28 AM Smith,
> Wayne via cctalk <cctalk(a)classiccmp.org>
> wrote:
>
> > I looked up the Jan. 1975 issue of Popular Electronics in the
> > Copyright Office's Periodicals Digest. It was published on Nov. 19,
> > 1974 if you are looking for an actual anniversary date.
> >
>
> The January issue was certainly not available in November of 1974.
>
> When did it actually get sent out and start showing up in people's mailboxes?
>
> Sellam
>
Same place as last year in the big parking lot across from Brookdale and
down the street from InfoAge Science and History Museums.
We have the Southern Monmouth County Firehouse museum selling food and
drinks in the middle.
This is a fundraiser for both museums (VCF and Firehouse museum) which are
both part of InfoAge.
All the info is here: https://vcfed.org/vcf-swap-meet/
Thanks!
Jeff Brace
VCF Mid-Atlantic Event Manager
Vintage Computer Federation is a 501c3 charity
On 5/6/2024 2:28 PM, Wayne S via cctalk wrote:
> You do need a very strong magnet. I’ve put 3.5 floppies on top of
> a mag tape demagnitizer ( not technically called that, but you know
> what i mean) and it had no effect at all. I could still read them fine
> in my pc. I surmised that the magnetic field generated was not strong
> enough to get through the plastic disk shield. Gave up after that.
And yet, I have a cheap Radio Shack tape degauzer and it erases
3.5" disks just fine. I do it all the time whenever I have
one that refuses to reformat. Quick pass over the degauzer
and they usually work fine. If not, time to toss them.
As for 720K disks I bought a box of new ones (12 boxes actually)
several years ago on eBay and expect they will out last me.
Especially now that I am moving everything to Goteks.
bill
Hey everyone,
My better half recently turned this on and also a podcast with the
creator/director. They mentioned they visited "someone" with a working
VAX 11/780 to get b-roll footage for the movie. Which one of us was
it? :D
In all seriousness, it would be fun to try and get a vintage copy of
the PROMIS software running on something (I assume it was VAX/VMS in
its original incarnation, but many other screenshots show
SNA/greenscreen implementations.)
Cheers, all!
--
-Jon
+44 7792 149029
I looked up the Jan. 1975 issue of Popular Electronics in the Copyright Office's Periodicals Digest. It was published on Nov. 19, 1974 if you are looking for an actual anniversary date.
-W
> On Saturday, April 27th, 2024 at 07:14, Bill Gunshannon via cctalk <
> cctalk(a)classiccmp.org> wrote:
>
> > > Magazine cover january, and into 1975 the revolution. So I'd say
> > > all
> >
> > I had that magazine. Wish I hadn't thrown it away oh so many years
> > ago.
>
> This one?
>
> https://urldefense.com/v3/__https://archive.org/details/197511PopularE
> lectronics__;!!AQdq3sQhfUj4q8uUguY!jsVD6bkUUnjpF4d8AeRUKyiCW6qk8LAqFsj
> dYW5cjAK-kOsMp32O4FfrPI5l1lqnTNp6sXQsHpX35FsPAzYDMIHhl-uy-NSC5w$
>
> The Doctor [412/724/301/703/415/510]
> WWW:
> https://urldefense.com/v3/__https://drwho.virtadpt.net/__;!!AQdq3sQhfU
> j4q8uUguY!jsVD6bkUUnjpF4d8AeRUKyiCW6qk8LAqFsjdYW5cjAK-kOsMp32O4FfrPI5l
> 1lqnTNp6sXQsHpX35FsPAzYDMIHhl-u9z1M8kw$
> Don't be mean. You don't have to be mean
>
https://urldefense.com/v3/__https://vintagecomputer.net/altair-poptronics.c…
(Jan and Feb)
>Fairly sure you could find something to run Doom >that uses less than 1.7MWBut what's the point of buying this monstrosity if not to play Doom? It is like SEVEN years old. ;)
I came across an article that said CP/M came out in April 1974. I remember
using this OS in the microcomputer world in the late 70’s; early 80’s. It
came from PL/M, (Programming Language for Microcomputers) later renamed
CP/M(Control Program for Microcomputers). I’m not sure what its legacy is
though as far as I can recall it was wrapped up in litigation for quite
some time. It was used in the 8-bit world but not sure what it's role was
in the early PC world!
Happy computing,
Murray 🙂
I had not realized the IBM 360 was 60 yrs. old this month. I worked on such
a computer in the late 60s in Toronto. What one could do with 8 Kbytes of
ram was remarkable!
Happy computing
Murray 🙂
Hello everyone
I need your help to identify an issue on my Diablo Model 40 Series. I
don't know where to look, it's so vast !
Here's the problem:
When RUN is activated, the drive begins its spin up and simultaneously
deploys the heads (normal) but instead of stabilizing them, the Head
Positioner receives a burst of reverse/forward micro signals. The heads
"vibrate", this creates an audible frequency "BRRRRRRRRRRRRRRRRRR", and
it is infinite, the heads are never loaded and the drive never reaches
READY.
At first I thought that perhaps the track zero sensor was defective or
something of the same order but when I disengage RUN mode, the drive
unloads the heads and they should be in a fixed position, here they
continue to reverse/forward but more slowly than in RUN mode.
Because the heads continues to mess around even in unload mode, this a
priori excludes alignment problems.
Here is a video of that issue:
https://youtu.be/HzzxLnSdEOg
Other information, if I cut the power while the drive is in RUN mode, it
does not do an emergency retraction of the heads, related problem?
I was hoping for a power supply problem but all the voltages and even on
the main board cage seem ok (with a multimeter).
If one of you had already encountered this problem of lack of head
stabilization and continuous reverse/forward on this type of drive?
Thanks !
Dominique
