>
> I mean, people here are talking about UHF connectors, the
> PL259s and SO239s, in a rather negative way.? Are they
> creating hardware rants?? I think not; what's YOUR
> opinion on that?
>
http://www.classiccmp.org/oldfaq.txt
2.8 Can I type obscenities about Microsoft in ALL CAPS!?!
(Or, in general, be unreasonable with reagard to advocacy posts?)
Check your anti-MS baggage at the door, please. For that matter, drop
any posts that serve only to perpetuate the holy wars.
------------------------------------------------------------------------
My opinion is that this is the etiquette that we agreed upon when we came here. I report, let everyone decide. Nuff Said.
I have, in paper form, a
420305239-001A, SC/MP Microprocessor Application Handbook, Feb 77
You can have it for free, on the sole condition that you scan it
and put it online. I'll even cover the cost of shipping from Sweden
to Germany.
/Lars
yea.. I'm sick of the this too..
You like your computer like a religion, fine.. Let other people have their religions too.
etslay opstay ethay icrosoftmay ashingbay okway?
>
>Subject: Re: Jones plugs, or similar sorts of plugs
> From: "bfranchuk at jetnet.ab.ca" <bfranchuk at jetnet.ab.ca>
> Date: Sun, 24 May 2009 10:58:20 -0600
> To: General Discussion: On-Topic and Off-Topic Posts <cctalk at classiccmp.org>
>
>Dave McGuire wrote:
>
>> They go by the same designation over here. They're one of the worst
>> connector designs I've ever seen. Not even suitable for VHF use, why on
>> earth someone named them "UHF" is quite beyond me. Have you ever put
>> one on a network analyzer? Bumps and reflections all over the place.
>
>If that is the connector I am thinking of ... UHF was 10MHZ+ ... it is that old.
>
>>> The BNC connecotr is a lot nicer.
>>
>> Twisting two pieces of wire together is a lot nicer than a PL259/SO239!
>>
>> -Dave
>
>No comment about RCA jacks ....
Ok, I've measured correctly installed UHF (PL259 and So239) and the impedence bump
is insignificant to low UHF. Their biggest weakness it they are not watertight.
Believe it or not RCA is good to UHF (500mhz tested) and it's weakness is
no built in retainer. It is good for chassis level interconnect to to 10-20W
level (at uhf).
Type BNC is very good to high uhf and beyond but power limited. Also you must use
the 50 or 75 ohm parts in the correct place. It is a constant impedence connector.
Type N is better at water tight and also higher power than BNC and handles
larger cables.
For UHF and higher SMA, SMC and relatives are prefered for lower power
interconnect.
Allison
Ian King <IanK at vulcan.com> wrote:
>
>> > -----Original Message-----
>> > From: cctalk-bounces at classiccmp.org [mailto:cctalk-
>> > bounces at classiccmp.org] On Behalf Of Dave McGuire
>> > Sent: Friday, May 22, 2009 12:56 PM
>> > To: General Discussion: On-Topic and Off-Topic Posts
>> > Subject: Re: Is this slashdot or Classiccmp? Re: Microsoft bashing
>> >
>> > On May 22, 2009, at 1:14 PM, Christian Liendo wrote:
>>> > > yea.. I'm sick of the this too..
>>> > >
>>> > > You like your computer like a religion, fine.. Let other people
>>> > > have their religions too.
>>> > >
>>> > >
>>> > > etslay opstay ethay icrosoftmay ashingbay okway?
>> >
>> > Sure thing. But let's make one thing clear: It's not a religion,
>> > as easy as it may be to dismiss it as such.
>> >
>> > -Dave
>
> Perhaps not, but the zeal borders on religious - and equally without factual basis. (No disrespect to any religion: the fundamental premise of any religion with which I'm familiar is faith, i.e. belief in that which is not proven.)
The problem that I see is that Microsoft advocates usually try to prove
that everyone else is wrong without ever considering if they have reason
for the bashing.
It's a gut reaction, which I'm sure Microsoft loves to see. It's like
unconditional buying in to the party line without any questions.
And it's mostly by people who actually have very actual experience with
anything else.
Not saying that this is true for you specifically, Ian. Just noting in
general...
> Fact: CERT reports just about as many exploits for Linux-derived systems as Windows (at least, that was the data I researched back when I was in grad school three or four years ago). There is a lot of argument (again, mostly rather zealous) about which OS has the more "serious" vulnerabilities, but in any event they ARE flaws.
And it's a sad day when people think that CERT is in any way related to
quality in any way. CERT first of all are only reporting potential
security problems, not quality problems. Second, CERT have had a
tendency to not even reveal problems that are reported until after they
have been fixed, which gives you both a skewed view, and also don't tell
you how much of a problem something really have been.
Third, as you note, just using the numbers from CERT don't even tell you
if this is a big or a small problem, so what do these numbers really
tell you???
Oh, and noone (I hope) is claiming that any OS is without flaws. It's
the design flaws that really upsets me (and others, I think).
> Fact: The most commonly seen causation for crashes in either Windows or Linux-derived operating systems is defective device drivers. Interestingly, the two operating systems approach this differently. Windows preemptively crashes: the logic is to return the machine to a known state. Linux tries to keep going, which may result in an inexplicable error later on. One can argue the merits of either approach, and I'm sure many do.
I don't know where you got that fact from, but anyway. Even assuming
that is true, you skip around some big problems here, such as the fact
that most people running Windows are doing so with privileges to install
a device driver straight away (it's usually connected with big problems
using Windows without having privileges), while you normally run without
the privilege of installing a device driver in most other systems.
However, defect device drivers are certainly a big problem.
But what I find to be a bigger problem in Windows are actually
incompatible DLL-files. All delivered from Microsoft. And all called the
same thing, but different versions. But some programs require one
version to work, while another program needs another version, and both
are incompatible with the other. So, what do I do then? And this will
not cause Windows to crash. But it's a mess anyway.
DLL hell ring a bell?
> Fact: I have a large box filled with 'Software Revision' release publications for RSX-11. (Hey look, I got it back to vintage systems!) Microsoft is not the first operating system vendor to issue patches and patches to patches and.... I'm not sure why it seems more "egregious" with one vendor than another - except that there is a tendency to bash "corporations", despite the fact that the majority of corporations are small, privately held companies.
Once more. No one is (I hope) claiming that there is a perfect OS
without problems. However, Microsoft seems to have just about any
problem any other OS had, and then invented a few new problems never
seen before.
And many of those are not something for CERT, or even crashes. Just
things that don't work as it should.
The concept of doing a reinstall of the OS every six to twelve months to
get the system back into shape is not something any other company that I
know of have as a concept. Neither the reboot every week.
The latter is becoming less of a problem though, as software updates
nowadays usually require you to reboot the system anyway, so you never
run systems long enough to get into the problems Windows seem to get
once it has been running for a month or so.
> Opinion: I thought Microsoft operating systems were getting better and better, until Vista. I hope they'll get it right with Windows 7 and get back on an upward trend. However, I will say that it wasn't just Vista, but also the poor quality of PC hardware (three motherboards in one year?) that drove me to Macs. I really like my PowerBook G4, not only for its convenience and reliability but also because it's dead sexy. I recently replaced my desktop (supporting four monitors) with two Dual G4s (each running two monitors and sharing the keyboard/mouse through Synergy). Function wins.
I agree. But the fact that seem to be getting better and better should
really be a warning bell, and not a proof of quality. If they could be
improving quality so much that it seems appearant for anyone using the
system, and to do that time and again, says that quality must have
started on a really low level. And do you really think that by doing a
few iterations, quality suddenly then is top notch?
And what happened with Vista?
> Disclosure: I worked for Microsoft for a dozen years. (I don't anymore.) When I worked at Microsoft, I did not like Vista and persisted in running XP on my company-issued laptop. In fact, for a while before I left I ran Ubuntu at home, until I grew weary of replacing not-inexpensive PC components and fighting compatibility issues (in a commoditized marketplace!). Now, since I don't work there anymore, no one bothers me about my PowerBook - since I've "taken off the collar", people have stopped expecting me to be an apologist - or seeing me as some kind of heretic. It's just a computer.
Ok. I'll make a disclosure as well. I hate Linux. I think it's a total
disaster. It's a bunch of clowns who hardly knows how to write an OS
sitting around hacking along as much as they can, and learning along the
way. Is that something I'd like to depend upon? No!
But I'd still pick Linux before windows if I have to. But not being
happy about it.
> These days, I've been spending a lot of my time on VMS on a VAX-11/780-5, using CMUIP as the networking layer. THAT will give you a sense of perspective. Hey, backups are done - I need to go finish reassembling this TU56 for a PDP-8/e.... -- Ian
And I spend time working on RSX, and even getting paid for it. And I'm
having a blast. Even though I know of a bunch of problems, bugs, and
security issues with the system. It is by no means bug free, but at
least most things work pretty much the way they are meant to, and the
systems have been chugging away for over 20 years without any major
issues. Security problems - yes. Performance problems - no.
I guess that from a CERT point of view, RSX would loose to Windows. But
I know of a few steel mills and paper mills that wouldn't be impressed
with Windows. Rebooting once a year is not an option. Especially not if
a few tons of hot steel is being processed right at that moment.
There. I'll stop my Windows bashing now, and pray that I'll be able to
keep working without having to deal with that OS. :-)
Johnny
--
Johnny Billquist || "I'm on a bus
|| on a psychedelic trip
email: bqt at softjar.se || Reading murder books
pdp is alive! || tryin' to stay hip" - B. Idol
> [ Video connector with pins like this
> :
>
> ? o o o???o
> ? o o o???o
> ]
Yeah - that's the plug I was referring to! I just recently picked up a nice 25" Mitsubishi television set that has one of these connectors on it for RGB, along with the usual composite video connectors. I also have several small monitors that use these plugs as well. If I can track down an inexpensive source of these connectors, it would be really handy to be able to use these monitors with other video sources, such as any number of old computers that use 15.75khz RGB video.
-Ian
Hi! Does anyone know of an available transformer suitable for making an
S-100 power supply? I need 120VAC input and 10VAC output and +/- 18VAC
outputs.
The best I solution I can find is two separate 80VA transformers; one
parallel 10VAC output and another 36VCT output which can be configured for
+/-18VAC outputs.
I would prefer a single transformer rather than dual transformers because
they are the most expensive part of a linear power supply.
I know Northstar and Vector Graphic used similar dual output transformers
but I cannot find anything like them after searching the usual vendors like
Digikey, Mouser, Jameco, etc. Even transformer manufacturers don't seem to
carry a stock product of this configuration although you can order custom
units.
Thanks in advance for any help. Your ideas greatly appreciated.
Thanks and have a nice day!
Andrew Lynch
Saw this while sightseeing on my tour of odd attractions in Oregon.
Not sure what model; it's older than an ASR 33. Has papertape punch,
very dirty.
Not sure how long it'll be there. Won't fit in my car...
Address is 64990 Deschutes Mkt Rd in Bend.
Just thought someone might be interested. I have a pic, but I'm
writing this from my phone so can't upload it yet :).
Josh
In case anyone else wants the measurements of the Jones plugs, the
sockets are 35mm by 78mm or in imperial, 1 3/8 by 3 1/16. The pin
orientations were as I described, alternate rows of horizontal and
vertical.
Roger Holmes.
>
> From: William Donzelli <wdonzelli at gmail.com>
>
>> Does anyone here have a any 40 pin Jones type plugs in their junk
>> boxes they
>> would be willing to sell?
>
> Can you provide a picture with dimensions? Jones plugs, especially the
> ones with large numbers of connections, come in various sizes and
> formats (big or small pin? 4 x 10 or 5 x 8? Which pins are keys?).
They are 4 by 10 pins. I think the left row of 10 are keyed vertical,
the next row horizontal, then vertical then horizontal, which would
stop you plugging in upside-down.
I can measure them properly at the weekend but I would estimate the
sockets are about 3 inches high and about an inch wide. I will get a
big torch and check the keying as well. The three sockets are labelled
T1, T2 and K and they were originally for connecting a cable to a BCD
encoded Friden Flexowriter which gave tape to card and card to tape
copying, with a printout made at the same time.
Thanks,
Roger Holmes.
