>> Armstrong was the more impressive in actually putting the tube to
>> work.
>
> DeForest is painted rather blatantly as nothing less than a slimeball
> by the T.H. Lee chapter cited by the previous web site:
>
> http://www-smirc.stanford.edu/papers/chapter1.pdf
>
> In legal proceedings attempting to claim credit for the superhet,
> DeForest made a perfect idiot of himself. He didn't have a clue.
It's tough for a techie to go into court and come out looking smart.
You can be the world's best expert on some important area of
technology and come out completely skewered every which way
>from Sunday if you try to look like a smarty-pants. Just being the
expert who was in the thick of things puts you at a real
disadvantage in almost every legal situation, no matter how
humble you try to be.
And even if your side wins it doesn't mean you're gonna be a
happy guy. Look what happened to Armstrong.
All these legal tribulations from the early 1900's seem just as relevant
(as business and/or moral lessons) today in the 21st century.
Tim.
One item I've needed on several occasions was an ASCII keyboard (TTL or RS-323 levels) for a vintage system. While I do have a few Keytronic serial keyboards with TTL output - they are old and can be "flaky".
I found a pair of products that convert a standard PS/2 keyboard to RS-232 ASCII output (and can be modified for TTL). In addition, the vendor was very cooperative about modifying his product to meet the needs of those of us in the vintage computer community.
To be specific, the standard products support baud rates from 2400bps to 115Kbs.
I contacted the owner of the company ("John Ursoleo" <jursoleo at att.net>) saying that for the vintage systems I was working with, I needed lower baud rates. John asked me to send my units back - and reprogrammed them to support the following baud rates: 110, 300, 600, 1200, 2400, 4800, 9600 and 19,200. He sent them back to me, and I tested them again with the low speed option and they worked great.
The "low baud rate" version of these products can be ordered with the /LB option.
Here's where to get the products, manuals, etc.:
PS2ADPT http://www.versalent.biz/seradpt.htm
PS2PRO http://www.versalent.biz/ps2pro.htm
Note: The standard output of this product is RS-232 voltage levels - but it is easy to modify them for TTL levels. Doing so voids the warranty - so you are on your own with this mod.
I have NO financial interest in this recommendation - it's just a good product I've found useful...
Cheers,
Lyle
--
Lyle Bickley, AF6WS
Bickley Consulting West Inc.
http://bickleywest.com
"Black holes are where God is dividing by zero"
A friend desires to leave the hot desert this summer and move to the cool mountain and yet maintain contact with his PDP11 with which he still runs his business. He has a rotten phone connection, but good internet. He runs a highly modified version of RTST 5x and cannot reasonably move his stable 30 y/o applications to later/other OS's. I would appreciate knowing what the listers use to accomplish same.
-> CRC
>From: Gary Buda <gbuda at cyberwright.net>
>To: greenkeys at mailman.qth.net
>Date: Sat, 23 Apr 2011 12:37:21 -0500
>Subject: [GreenKeys] Free RTTY machines in central Iowa
>
>Des Moines had a swap fest today. One of the sellers had a sign for a FREE
>model 33 and a FREE model 18. What they really have, I believe is a FREE
>model 33 and a FREE model 15. They're relocating to Florida and don't want to
>haul this stuff with them nor do they want to throw it in the garbage. They
>didn't bring the units to the swap fest, so I have not seen them. And, I
>don't have an interest in them either. They just sold their computer and
>therefore no longer have email. But, you can contact them here:
>Rich Acopy
>515-243-9567
>
>Good luck!
>Gary WA0NDN
>NNNN
>
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>
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I know this is from an old post but I am looking for a 130 in one manual
28-259 and was wondering if you ever got this one? If you did can you e-mail
me a copy? Thank You Don
http://www.mhtest.com/ has done it before, maybe you won't even have to send them your boards :)
For many purposes I think I'd be happy with a good 600 DPI color scan of both sides (including silkscreen). I don't think that modern PCB processes will by default produce a board that "looks like" an Altair era board (I remember the silkscreen actually covering tinned solder pads.)
On Fri, 22 Apr 2011 22:52:22 -0500, you wrote:
>And they don't think there's something wrong (and unprofessional)
>about this practice? It looks (to the layperson) that it's so deeply
>ingrained in the culture that it has become acceptable and expected. Do
>the people involved just view it as an acceptable risk, or do they think
>there just isn't any risk?
>
> -Dave
There are probably a few other MD's (and DO's) on this list, including
me ;)
I went through it in my late 20's and now, 20 years later, would not
have the stamina to do it at all, let alone safely. From personal
experience I'm inclined to believe the practice of 36 hour shifts is
no more or less than institutionalized hazing, as has already been
addressed by other posters. Any complaints were always met with
derision of the "you think YOU have it tough, when *I* was an intern I
had to walk uphill both ways barefoot in the snow 36 hours a day",
etc. Especially among surgeons, who usually won the macho-asshole
award hands down.
-Charles
--- snip ---
>>
>>Has anyone used any of the serial port ethernet servers (aka port
>>directors) and how well did they work?
> Now that we have more details I'd say that the best solution is
> either this, or else a dedicated low-end x86 PC running OpenBSD. In
> either case the 'fun' part could very well be wiring the two
> together. Honestly I'd recommend a PC with OpenBSD over a Serial
> Port ethernet server.
--- snip ---
A VPN router and a 4 or 8-port terminal server should be adequate.
Xyplex terminal servers, while a PITA to configure, seem pretty darned stable.
An MX1600-04 is a 1U rack size, and can support 16 concurrent sessions.
It's best to use them with a multiplexor that supports modem control though,
so that if your Telnet session drops, your interactive session becomes detached.
Otherwise, the next person connecting will pick up your session.
I've successfully interfaced Xyplex series routers with Emulex CS02's, and DHV11's.
It's been some time since I've messed with them, though, so I can't readily
spout the exact terminal server settings & cable pin-outs, so I'd have to
dig them out of my storage unit for examination.
Lantronix terminal servers will also work; they're alot smaller, but not my favorite.
(I couldn't get rid of the pesky "Welcome to the Lantronix Terminal Server" message.)
T