Howdy gents,
Working away on the recently acquired Osborne 1. Seems there's something
wrong with the KB - and if I didn't know better, I'd say it's a case of
shorted contacts.
The KB connector is 24 pins, double row header like a short floppy or IDE
header.
On the KB side, there are two "shorted
On 2015-Aug-22, at 11:55 PM, drlegendre . wrote:
> On Sun, Aug 23, 2015 at 1:17 AM, Chuck Guzis wrote:
>> On 08/22/2015 10:23 PM, dwight wrote:
>>
>> I would think the reverse voltage sum of the diodes is enough.
>>> Different diodes also can handle different voltages. Since the sum
>>> of the fo
There was an outfit here in Orange County, Ca that was a den of oddballs
who actually like to write compilers and were good at that was called
CSPI. In the 78-79 timeframe, Microdata bought a compiler for Cobol and
Fortran from them with a really big check and helped them along the path
of bec
On Sun, Aug 23, 2015 at 3:50 AM, Jay West wrote:
> Glen wrote...
> -
> Is that the one you rescued from somewhere in LA? Was wondering if you were
> able to successfully manage that.
> -
> Nope. That was an 800 series KSR. I still want that, but the business trip I
> was hoping to use to
I've used the capacitor method to provide most of the drop
in the past. I don't usually max out the LEDs at 20ma. I find
there is little difference between 10 and 20ma.
Yes, the 10 ( or 20ma ) is current flow through the capacitor.
It is necessary to have some resistor in series as well to suppress
>
> I've also seen C-R series voltage dropping circuits, here & there.
> Correct me if I'm wrong, but doesn't the series cap dissipate power just as
> it would, were it a series resistor? I mean, if the LED is passing 20mA,
> the cap is also doing 20mA - and at whatever the Vdrop is.
>
> Right
On 08/22/2015 11:55 PM, drlegendre . wrote:
I've also seen C-R series voltage dropping circuits, here & there.
Correct me if I'm wrong, but doesn't the series cap dissipate power
just as it would, were it a series resistor? I mean, if the LED is
passing 20mA, the cap is also doing 20mA - and at
On 23/08/2015 09:28, drlegendre . wrote:
Howdy gents,
Working away on the recently acquired Osborne 1. Seems there's something
wrong with the KB - and if I didn't know better, I'd say it's a case of
shorted contacts.
The KB connector is 24 pins, double row header like a short floppy or IDE
head
On 08/23/2015 07:10 AM, dwight wrote:
I've used the capacitor method to provide most of the drop in the
past. I don't usually max out the LEDs at 20ma. I find there is
little difference between 10 and 20ma. Yes, the 10 ( or 20ma ) is
current flow through the capacitor. It is necessary to have som
On 08/23/2015 02:29 AM, jwsmobile wrote:
There was an outfit here in Orange County, Ca that was a den of
oddballs who actually like to write compilers and were good at that
was called CSPI. In the 78-79 timeframe, Microdata bought a compiler
for Cobol and Fortran from them with a really big chec
-Original Message-
From: cctalk [mailto:cctalk-boun...@classiccmp.org] On Behalf Of Brent
Hilpert
Sent: Sunday, August 23, 2015 3:07 AM
To: General Discussion: On-Topic and Off-Topic Posts
Subject: Re: RS-232 Tx / Rx monitoring LEDs?
On 2015-Aug-22, at 11:55 PM, drlegendre . wrote:
> On
Heh, all you had to say was "power factor" and I've have understood. I
suspected that was the case, but it seemed too easy..
Guess I'm too used to thinking in simple ohmic terms, with Watt & Kirchhoff
always looming large. Something told me that, in the end, there was no way
around dealing with th
> Guess I'm too used to thinking in simple ohmic terms, with Watt & Kirchhoff
> always looming large. Something told me that, in the end, there was no way
Well, Kirchhoff's laws do apply in AC circuits, but you have to be careful
how you apply them, given that voltages and currents need not be in
On 2015-Aug-23, at 9:54 AM, Steve Moulding wrote:
> -Original Message-
> From: cctalk [mailto:cctalk-boun...@classiccmp.org] On Behalf Of Brent
> Hilpert
> Sent: Sunday, August 23, 2015 3:07 AM
> To: General Discussion: On-Topic and Off-Topic Posts
> Subject: Re: RS-232 Tx / Rx monitoring L
On 2015-Aug-23, at 9:06 AM, Chuck Guzis wrote:
> On 08/23/2015 07:10 AM, dwight wrote:
>> I've used the capacitor method to provide most of the drop in the
>> past. I don't usually max out the LEDs at 20ma. I find there is
>> little difference between 10 and 20ma. Yes, the 10 ( or 20ma ) is
>> curr
>
> Those ubiquitous motion detectors for outdoor lights use capacitive dropping
> to supply the
> low voltage for the ICs and electronics. Cap and small R in series with the
> AC input to a bridge rectifier.
> Works out well in that the bridge rectifier permits current flow in both
> direction
Anyone out there have:
1) The Schematic for the newer SA-800/SA-701 board part number 25229.1 ?
(It might also go by 25228 or 27121). The SA-800 maintenance manual on
bitsavers from Feb 78 describes the original discrete board (such as I
have on my Altos in the SA-800s) and an LSI-based board whic
> I can believe that the effect is only temporary--the action simply
> cannot go any deeper than a few microns. All of which goes to show
> that if you want a more permanent color, there's always paint. I have
> equipment that's made from high-density polyurethane foam (no special
> dies or forms
Would you willing to ship the A500 up to Michigan? I'd give you a few bucks
for it as a spare unit for the one I've got.
Best,
Sean
On Sun, Aug 23, 2015 at 4:52 PM, Maxx Wood wrote:
> Anyone who's passing through, or lives near Indianapolis, feel free to
> give me a shout to set up a time to
@#%!^
Why is all this posted a full year after I leave Indianapolis and move
to Belgium!? :D
LOLOL
I will ask my local contacts.
On Sun, Aug 23, 2015 at 10:52 PM, Maxx Wood wrote:
> Anyone who's passing through, or lives near Indianapolis, feel free to give
> me a shout to set up a time to per
> On Aug 23, 2015, at 13:52, Maxx Wood wrote:
>
> Amiga 2000HD (boots, but I don't have a keyboard or mouse, and the floppy
> drives continuously seek)
If you're referring to a 1-track click each second, then that's normal for an
Amiga. It's part of the disk change detection routine. There we
Anyone who's passing through, or lives near Indianapolis, feel free to
give me a shout to set up a time to peruse what I have. I have amassed
enough machines to take on their own gravitational pull. Most are in
various states of disrepair, in need of attention, but quite a few still
work or don
On 8/23/2015 1:52 PM, Maxx Wood wrote:
Compaq Portables (luggable and plasma)
I'm interested in Portable III's and floppy media for them. Let me know
what you might have working and otherwise.
thanks
Jim
A! Neat to know - that's exactly what it's doing. :)
On 08/23/2015 06:32 PM, Mark J. Blair wrote:
On Aug 23, 2015, at 13:52, Maxx Wood wrote:
Amiga 2000HD (boots, but I don't have a keyboard or mouse, and the floppy
drives continuously seek)
If you're referring to a 1-track click each se
Hi all,
I have a PDP-11/55 for sale (Ottawa, Ontario, Canada). Bids open
until 2015 09 15, buyer to arrange shipping, I will have it wrapped
and ready to go.
Please visit:
www.krten.com/~rk/museum/index.html
For pictures, detailed inventory and contact info. Sealed bids via
eamil ple
Hi all,
I have a PDP-11/55 for sale (Ottawa, Ontario, Canada). Bids open
until 2015 09 15, buyer to arrange shipping, I will have it wrapped
and ready to go.
Please visit:
www.krten.com/~rk/museum/index.html
For pictures, detailed inventory and contact info. Sealed bids via
eamil ple
On 08/23/2015 09:53 PM, Ali wrote:
I can tell you from personal experience that repainting does not work
well. One, matching the color is nearly impossible. You can get
pretty darn close but not exact. Two, the paint quality is never as
good. Three, the feel is different - this one is hard to ex
I've successfully "retrobrited" old TV safety screens and a few NES
console. What I used was 12% hydrogen peroxide from the beauty supply shop,
along with sodium percarbonate, glycerin to keep it wet and xanthan gum to
stabilize it to a paint on gel. Then all you do is paint it on, cover it
with Sa
On Sun, Aug 23, 2015 at 3:52 PM, Maxx Wood wrote:
> Anyone who's passing through, or lives near Indianapolis, feel free to give
> me a shout to set up a time to peruse what I have. I have amassed enough
> machines to take on their own gravitational pull. Most are in various states
> of disrepair,
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