Does anyone have a suggestion of the value of a signed J. E. Thornton
"Design of a Computer: The Control Data 6600" book? Some is trying to sell
one for $125. Any ideas? Thanks
I'd be real careful running them on a "fast" drive. I just tried to
archive about 120 TK50s and almost half of them stuck to the head
because of the coating coming off and gumming up the head.
--
I had exactly the same experience a few months ago. The formulation
of TK50s appear to 'shed', dumping residue when the tape reverses.
If you are going to try it again, find a drive where you can easily
access the head, so that you can clean it before EVERY attempt to
read a tape.
> And as found with Colossus, it's power cycling that really
> kills them, so keep that to a minimum and they tend to last
> pretty well.
The fail rate can be reduced significantly by bringing the
filament supply up slowly, over a couple of minutes, and then
applying the bias supplies for a period, the longer the better,
before the HT is applied.
It's not unusual to see lifetimes of 150,000+ hours on
transmitter valves using these techniques and that's on valves
power cycled a few times each day.
Lee.
.
___________________________________________________________
How much free photo storage do you get? Store your holiday
snaps for FREE with Yahoo! Photos http://uk.photos.yahoo.com
Anyone have it? PSU circuitry checks out for the Whitechapel CG-200 but
it seems reluctant to switch on; for starters I want to check the CPU
board for power and reset...
cheers
Jules
> "Someday we'll discover a dinosaur nest in Arizona and right
> next to the fossil will be a stone-etched PRIMOS manual. It
> was probably PRIMOS that caused the dinosaurs to die off in
> the first place. -- Ari Rapkin's uvacs quotes"
I worked for Pr1me for a few years. I rather like PRIMOS.
For what its worth, I have access to a stack of HP 300
machines at work. I think they are mainly 310 machines.
I have keyboards too. I have been given the OK to do with
them as I please.
Unfortunately, we have only 1 drive and its in use in a HP
Rocky Mountain Basic app. at that. If I ever finish my
Labview port, its going home with me :)
Anyway, if anyone is interested, $20 each (my time) plus
actual shipping costs. If you are in Lexington KY, stop
by and grab one or two free!.
BTW, I think it boots the disk. Least it did on my
diskettes. I will have to check to see which option they
are.
Max
> I've just come across an HP box containing 5 3.5"
>floppies. They all have
> original HP labels on them.
>
> All the labels contain the following
>
> Hewlett-Packard
> 9000 Series 200/300
> 98616A Opt. 045
> BASIC 5.1
>
> The rest of ithe label depends on the disk :
>
> System Disk
> Pat No 98616-10500 Rev. 5.1
>
>
> Drivers + Language Ext
> Part No 98616-10501 Rev. 5.1
>
>
> Utilities Disc
> Part No 98616-10502 Rev. 5.1
>
> HFS Utilities
> Part No 98616-10503 Rev. 5.1
>
>
> Manual Examples Disc
> Part No 98616-10504 Rev 5.1
>
>
> Anyone know what it is, and what machine it runs on?
>
> -tony
>
>
>
> ------------------------------
>
> Message: 4
> Date: Sun, 24 Jul 2005 01:25:59 +0100 (BST)
>From: ard at p850ug1.demon.co.uk (Tony Duell)
> Subject: Re: What is an HP98616?
> To: cctalk at classiccmp.org
> Message-ID: <m1DwUJf-000IyQC at p850ug1>
> Content-Type: text/plain
>
>>
>>
>> 98616A Opt. 045
>> BASIC 5.1
>>
>> --
>>
>>
>> HP BASIC verison 5.1
>>
>> Should run on 200's and 300's
>
> I'd guessed that much :-) Is this a bootable system, or
>does it run under
> something else? I've noticed that these disks appear to
>have LIF
> filesystems on them.
>
> What does the Opt 045 mean?
>
> -tony
>
>
>
Gene Buckles's retroarchive.org seems to be down. Does anyone know if
it's permanent and did anyone mirror it?
James
--
www.blackcube.org The Texas State Home for Wayward and Orphaned Computers
--- On Sun 07/24, Gene Ehrich < gehrich at tampabay.rr.com > wrote:
From: Gene Ehrich [mailto: gehrich at tampabay.rr.com]
To: cctalk at classiccmp.org
Date: Sun, 24 Jul 2005 09:08:56 -0400
Subject: Re: disk versus disc
At 08:04 AM 7/24/2005, you wrote:<br>>Curiosity for the day - is there any difference between the use of disk<br>>and disc when describing floppy drives, hard drives etc.?<br><br>my take<br><br>Disk = floppy or hard disk<br><br>Disc - some people use it to describe a CD. Imagine it started with a <br>spelling error<br><br><br><br>=================================<br>Gene Ehrich<br>gehrich at tampabay.rr.com<br><br>
I don't agree. I remember seeing both spellings long ago, like back
in 1971 (long before CDs), and wondered then which was or is correct.
Seems like both are used quite readily. I don't have a problem with
either spelling.
Tim R
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Hmm, my guess, this is a UK/US spelling thing.
Other words that come to mind are center/centre, program/programme,
and then all the verbs with z/s, like recognize/recognise.
just 2c,
- Henk, PA8PDP.
-----Original Message-----
From: cctalk-bounces at classiccmp.org
To: General Discussion: On-Topic and Off-Topic Posts
Sent: 24-7-2005 15:08
Subject: Re: disk versus disc
At 08:04 AM 7/24/2005, you wrote:
>Curiosity for the day - is there any difference between the use of disk
>and disc when describing floppy drives, hard drives etc.?
my take
Disk = floppy or hard disk
Disc - some people use it to describe a CD. Imagine it started with a
spelling error
=================================
Gene Ehrich
gehrich at tampabay.rr.com
