On 2017-Jul-19, at 11:37 PM, Rob Jarratt via cctalk wrote:
>> -Original Message-
>> From: cctalk [mailto:cctalk-boun...@classiccmp.org] On Behalf Of Chuck Guzis
>> via cctalk
>> Sent: 20 July 2017 03:34
>> To: Fred Cisin via cctalk
>> Subject: Re: Removing Pitting and Rust From an Enclosur
I like it, that's quite artfully done actually! Best paint job ever on an 024
(am I right? 024, not 026 because it has no printer?). It would be perfect if
you had a normal 024 or 026 to put right beside it with its drab gray wrinkle
paint. What a pity it lost its keyboard. That ruined both the
It depends on what the object in question is for (decoration or durability)
and what time period it was done.
Way back in the early 90's when I worked at a plating facility for the
printing industry (Tide soap boxes, Marlboro cigarette boxes as an example)
they used to copper plate large and
On Wed, Jul 19, 2017 at 11:29 PM, Ethan Dicks wrote:
> I have no datasheet, but I have examples on DEC M-series FLIP-CHIP
> modules from my PDP-8/L, c. 1968.
>
> I am pretty sure I have examples with 1968 date codes and possibly
> 1967 date codes.
>
Thanks! Also, the 1967 Allied catalog lists th
On Jul 19, 2017, at 10:21 PM, Josh Dersch via cctech wrote:
> On 7/18/2017 10:29 PM, r.stricklin via cctalk wrote:
>
>> I don't have a 375, but I'll be glad to provide what I can. Having a sense
>> of what, specifically, was being sought (and where to send it) would help me
>> focus effort.
>
On 07/20/2017 12:02 AM, Brent Hilpert via cctalk wrote:
> A copper layer can perform some filling and smoothing function in a plating
> job.
> Its perhaps more significant purpose however (as I understand it in my
> limited experience with having plating done*), is to provide an oxygen
> barrie
> On Jul 19, 2017, at 8:01 PM, Brent Hilpert via cctalk
> wrote:
> ...
> Very nice, in addition I much appreciate the use of the period-appropriate
> oscilloscope.
>
> I've been offered a Tek 500 series recently, I'm reluctant to take it on as
> they are in practice such boat anchors
> compar
> On Jul 20, 2017, at 3:02 AM, Brent Hilpert via cctalk
> wrote:
>
>> ...
>
> The yellowish plating is probably chromate conversion:
> https://en.wikipedia.org/wiki/Chromate_conversion_coating
That sounds familiar from vague DEC memories.
As for those galvanized iron pieces attached to
On Wed, Jul 19, 2017 at 1:52 PM, Rob Jarratt via cctalk <
cctalk@classiccmp.org> wrote:
> The TURBOchannel extender I got has a bit of rust and quite a lot of dark
> pitting on the steel surfaces. I am not sure what the finish is, whether it
> is anodized or galvanized. In any case, does anyone ha
Or, in today's dollars - $58. Ouch.
From: "General Discussion"
To: "cctalk"
Sent: Thursday, July 20, 2017 1:35:47 AM
Subject: Re: early (pre-1971) edge-triggered D flip-flop ICs
On Wed, Jul 19, 2017 at 11:29 PM, Ethan Dicks wrote:
> I have no datasheet, but I have examples on DEC M-seri
In 1978 the place I worked the cost per SSI/MSI TTL 38510 device was
between $100 and $200 each by the time they were released to production.
the key is the 38510 and the testing. In final use, the parts had power
applied for no more then an hour.
-pete
On Thu, Jul 20, 2017 at 1:35 AM, Eric Smith
> From: Mark Tapley
> Next stop, I'll pull the cover off the machine and see whether I can
> spot any spilled battery electrolyte from the old battery or anything
> else suspicious looking on the logic board in that area
It probably wouldn't hurt to clean that area with a Q-tip di
> -Original Message-
> From: cctalk [mailto:cctalk-boun...@classiccmp.org] On Behalf Of Paul
Koning
> via cctalk
> Sent: 20 July 2017 15:18
> To: Brent Hilpert ; General Discussion: On-Topic and
Off-
> Topic Posts
> Subject: Re: Removing Pitting and Rust From an Enclosure
>
>
> > On Jul
> -Original Message-
> From: cctalk [mailto:cctalk-boun...@classiccmp.org] On Behalf Of Chuck Guzis
> via cctalk
> Sent: 20 July 2017 14:43
> To: Brent Hilpert via cctalk
> Subject: Re: Removing Pitting and Rust From an Enclosure
>
> On 07/20/2017 12:02 AM, Brent Hilpert via cctalk wrot
On Jul 19, 2017 10:43 AM, "Douglas Taylor via cctalk"
wrote:
The pdp11_fp.c code is quite intricate. If simh was a simple simulation it
would take the easy route and use the intel fp co-processor as you point
out, but it doesn't. It actually 'emulates' what the pdp11 would do in
hardware.
Do
On Jul 19, 2017 10:15 AM, "Fred Cisin via cctalk"
wrote:
> That Steve Jobs was pestering them for a cheap drive, but due to the
holes in his jeans and personal hygiene?, they never took him seriously.
I think Shugart settled on 5.25" for the size of a minifloppy at least a
year, and more likely t
Extremely interesting Fred. I hadn't heard of half of those experimental disk
sizes. Are those stories from your experience or from that article? (Yes I'll
rtfm shortly).
The only odd one i have is a backup cartridge? that resembles around a 3.5" but
is in fact closer to the mythical 12" floppy
Eric said:
> I think Shugart settled on 5.25" for the size of a minifloppy at least a
> year, and more likely two years, before Steve Jobs would have visited. I
> don't have proof, but SA400 public intro was in 1976, and they probably
> took more than a year of development to get to that point.
Fo
On 07/20/2017 10:42 PM, Steve Malikoff via cctalk wrote:
> Eric said:
>> I think Shugart settled on 5.25" for the size of a minifloppy at least a
>> year, and more likely two years, before Steve Jobs would have visited. I
>> don't have proof, but SA400 public intro was in 1976, and they probably
>>
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