On 26/08/2016 06:26, Warner Losh wrote:
10base5 also had rules for minimum bend radius
True, because bending the cable alters the geometry and introduces
impedance discontinuities, though (to be picky) the allowable bend
radius varies between cable manufacturers because the precise cable
con
I have found a tear in the "arrow head" of the leader of a TK70 drive. I do
have a spare somewhere should I need it, but I was wondering if anyone has
any clever ways to repair it?
Thanks
Rob
>On 26/08/2016 06:26, Warner Losh wrote:
>> 10base5 also had rules for minimum bend radius
>
>True, because bending the cable alters the geometry and introduces
>impedance discontinuities, though (to be picky) the allowable bend
>radius varies between cable manufacturers because the precise cable
>
> On Aug 26, 2016, at 10:24 AM, Joseph Zatarski wrote:
>
> ...
> Yes, the whole reflection thing could get into a bit of a complex
> discussion involving transmission line theory, but I am an electrical
> engineer, so here goes:
>
> Yes, you need proper termination at either end, or else you ge
> On Aug 26, 2016, at 7:56 AM, Paul Koning wrote:
>
>
> That reminds me of an amusing error in a 1980s trade rag for DEC users ("The
> DEC Professional"). It discussed how you could mix 10Base5 and 10Base2 hosts
> by coupling the two size coax cables through an N to BNC adapter. That's
> f
> On Aug 26, 2016, at 11:00 AM, Ian McLaughlin wrote:
>
>
>> On Aug 26, 2016, at 7:56 AM, Paul Koning wrote:
>>
>>
>> That reminds me of an amusing error in a 1980s trade rag for DEC users ("The
>> DEC Professional"). It discussed how you could mix 10Base5 and 10Base2
>> hosts by coupling
Years ago I bought two HP 9000/715s. I've barely done anything with them,
so I don't remember for sure if they even came with keyboards. That unit's
keyboards are supposed to be HP-HIL, and I know there was a breakout box to
use a PS/2 *connector* on such a keyboard; but I'm wondering about the
par
On 2016-08-26 12:37 PM, Eric Christopherson wrote:
Years ago I bought two HP 9000/715s. I've barely done anything with them,
so I don't remember for sure if they even came with keyboards. That unit's
keyboards are supposed to be HP-HIL, and I know there was a breakout box to
use a PS/2 *connector
On 8/26/16 8:37 AM, Eric Christopherson wrote:
> Years ago I bought two HP 9000/715s. I've barely done anything with them,
> so I don't remember for sure if they even came with keyboards. That unit's
> keyboards are supposed to be HP-HIL, and I know there was a breakout box to
> use a PS/2 *conne
http://www.ebay.de/itm/1von3-NEU-Digital-15-Data-Cartridge-RLo2K-DC-Jahr-1980-Raritat-NEU-OVP-/322239412232?hash=item4b06f73808:g:jsEAAOSwgZ1Xvzlv
seems he has 3 new boxed ( I'm not related )
and here are all the part numbers
http://www.ambry.com/hp-computer-model/9000/715/64.html
On 8/26/16 8:58 AM, Al Kossow wrote:
>
>
> On 8/26/16 8:37 AM, Eric Christopherson wrote:
>> Years ago I bought two HP 9000/715s. I've barely done anything with them,
>> so I don't remember for sure if th
On Fri, Aug 26, 2016 at 8:16 AM, Rob Jarratt
wrote:
> I have found a tear in the "arrow head" of the leader of a TK70 drive. I do
> have a spare somewhere should I need it, but I was wondering if anyone has
> any clever ways to repair it?
We always just replaced them back in the day. Now, with t
On 2016-08-26 06:16, Rob Jarratt wrote:
I have found a tear in the "arrow head" of the leader of a TK70 drive. I do
have a spare somewhere should I need it, but I was wondering if anyone has
any clever ways to repair it?
Isn't it easier, to just order the replacement?
In a message dated 8/26/2016 8:51:16 A.M. US Mountain Standard Time,
phb@gmail.com writes:
On 2016-08-26 12:37 PM, Eric Christopherson wrote:
> Years ago I bought two HP 9000/715s. I've barely done anything with them,
> so I don't remember for sure if they even came with keyboards. That
The MPS (MicroProcessor Series) was an attempt by DEC to introduce an Intel
8008-based system as a cost-effective replacement for minicomputers used in
process control. The system has its own 14-bit blinkenlights front panel for
accessing the 8008.
Docs here:
https://www.dropbox.com/sh/bezyixp
On 8/21/2016 6:47 PM, Chuck Guzis wrote:
On 08/21/2016 04:15 PM, Al Kossow wrote:
nope, the transport has rubber rollers that crack, and little rubber
belts.
That's the transport; but what are the shortcomings of the medium itself?
FWIW, I've got at least one DDS drive with rubber parts th
Was there ever DECnet support available for Solaris 8? I rather doubt it, but
if it exists then I'd be interested in finding it for my Ultra 60.
--
Mark J. Blair, NF6X
http://www.nf6x.net/
On 08/26/2016 09:48 AM, j...@cimmeri.com wrote:
> There appear to be different kinds of material used for the rollers.
> For instance, with a 1999 OnStream DI30 (parallel port 30gb) ADR
> drive, it's a typical black rubber roller like you'd see in many QIC
> drives, and it's turned completely to
On Fri, Aug 26, 2016 at 04:40:55PM +, Jack Rubin wrote:
> The MPS (MicroProcessor Series) was an attempt by DEC to introduce an
> Intel 8008-based system as a cost-effective replacement
I had the displeasure of using a different 8008-based system; this one
was a typesetting machine.
I hadn't
> -Original Message-
> From: cctalk [mailto:cctalk-boun...@classiccmp.org] On Behalf Of Ethan
> Dicks
> Sent: 26 August 2016 17:07
> To: r...@jarratt.me.uk; General Discussion: On-Topic and Off-Topic Posts
>
> Subject: Re: Repairing Tape Leader Damage in TK70 Drive
>
> On Fri, Aug 26, 201
Hello Rob,
I don't think the leader can be repaired, as the used polymer doesn't
react well with glues, simply out will not be robust enough.
But if you have some patience and a sharp knife, topi can cut out new
leaders from black plastic layers, I used old X ray films of the bones.
I did it fo
I believe this subject has cropped up before and there was a third party
solution for Solaris. I will look into the archives to see if anything pops
out - mind, it might have concluded 'yes there was a product' but no
software still exists. A lot of third party solutions got lost in the
transitions
I tried fashioning my own leaders from various materials but could never
find one robust and flexible enough compared to the originals, so did in
the end resort to buying a stock.
On 26 August 2016 at 19:23, shad wrote:
> Hello Rob,
> I don't think the leader can be repaired, as the used pol
> On Aug 26, 2016, at 3:10 PM, Mark Wickens wrote:
>
> I believe this subject has cropped up before and there was a third party
> solution for Solaris. I will look into the archives to see if anything pops
> out - mind, it might have concluded 'yes there was a product' but no
> software still ex
On 26/08/2016 20:18, Paul Koning wrote:
On Aug 26, 2016, at 3:10 PM, Mark Wickens wrote:
I believe this subject has cropped up before and there was a third party
solution for Solaris. I will look into the archives to see if anything pops
out - mind, it might have concluded 'yes there was a pr
Are they still for sale?
On 8/26/2016 2:12 PM, Mark Wickens wrote:
I tried fashioning my own leaders from various materials but could never
find one robust and flexible enough compared to the originals, so did in
the end resort to buying a stock.
On 26 August 2016 at 19:23, shad wrote:
On 08/26/2016 12:12 PM, Mark Wickens wrote:
> I tried fashioning my own leaders from various materials but could
> never find one robust and flexible enough compared to the originals,
> so did in the end resort to buying a stock.
Has anyone tried film or audio tape splicing kits?
--Chuck
Yes, I tried 35mm film but it isn't robust enough.
I need to look in to what I have. I don't use TK50's anymore.
The other potential option is to use the leader of a more modern drive as a
'donor'.
Mark.
On 26 August 2016 at 20:27, Chuck Guzis wrote:
> On 08/26/2016 12:12 PM, Mark Wickens wro
On 08/26/2016 12:30 PM, Mark Wickens wrote:
> Yes, I tried 35mm film but it isn't robust enough.
Other possibilities that come to mind are "Gorilla tape" or "Taear-Aid"
repair tape. I haven't tried either on magnetic media, but they're
pretty tough.
--Chuck
> -Original Message-
> From: cctalk [mailto:cctalk-boun...@classiccmp.org] On Behalf Of Chuck
> Guzis
> Sent: 26 August 2016 20:59
> To: General Discussion: On-Topic and Off-Topic Posts
>
> Subject: Re: Repairing Tape Leader Damage in TK70 Drive
>
> On 08/26/2016 12:30 PM, Mark Wickens wr
On 8/26/2016 1:35 PM, Dave Wade wrote:
There is a TK50 piccy well down this page here:-
http://williambader.com/museum/vax/vax.html
I think that is the same as the TK70
Looks like he tore out the end hook on that tape as well, there is a gap
in the photo of the disassembled cartridge, but ther
On 08/26/2016 02:11 PM, jim stephens wrote:
> I'd think the tolerances on the shape and strength of that would be
> pretty tight, so fabbing one up may be tricky. Harvesting one and
> splicing with some luck may be a better way to go if possible.
Makes me glad that we never bothered with the t
HBO’s “Silicon Valley” has a number of Silicon Valley-area advisors actively
helping to ensure they get these details right.
-- Chris
> On Aug 24, 2016, at 8:17 PM, Tony Aiuto wrote:
>
> Taking this forward 30+ years, Silicon Valley is a period drama that gets
> significant details spot-on r
thanks for digitising all this fascinating DEC MPS material, I'm glad
to see this coming to light.
I was surprised to see that there was a DEC authored FOCAL for the
8008 for this system, known as FOCAL/MPS. Squeezed into 12KB with
2.6KB left free for the user program.
Does anyone know if the var
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