Chuck Harris wrote:
David Martindale wrote:
However, I don't see how the earth's tilted field prevents a CRT from
being
used in both hemispheres. I can see how it might need to be realigned,
since it uses permanent magnets on the yoke and their field will be
influenced by the earth's local f
wa1...@att.net wrote:
FWIW.A good high quality compass needs to be designed based on what
region of the earth you plan to use it in. The Suunto ones I have are
marked with a US region code.
That's because they need to compensate for the "dip" in the magnetic
field. The south end of th
Bob Camp wrote:
Hi
The only real limit on a Johnson counter is how clever you get making sure
that only one stage is a 1 and all the rest are zeros. There are *lots* of
ways to take care of that, each with it's own set of trade offs.
Bob
Of course, if your goal is "minimizing gates" or "mi
Bob Camp wrote:
Hi
The only real limit on a Johnson counter is how clever you get making sure
that only one stage is a 1 and all the rest are zeros. There are *lots* of
ways to take care of that, each with it's own set of trade offs.
One problem with a Johnson counter is that it takes many m
Please excuse the individual message.
Tom, I sent you a direct reply over 24 hours ago, and
I suspect that e-mail from me to you is being filtered,
as I also sent you a direct e-mail on 6/April about
my Thunderbolt problem. I have been using your
tvb leapsecond address.
Yes, I'd appreciate
David Martindale wrote:
However, I don't see how the earth's tilted field prevents a CRT from being
used in both hemispheres. I can see how it might need to be realigned,
since it uses permanent magnets on the yoke and their field will be
influenced by the earth's local field. But a different
On Thu, Apr 15, 2010 at 8:08 PM, Hal Murray wrote:
>
> I've got a Garmin GPS 18 USB. (18, not 18x) It's inside. I'm not surprised
> when it fades out.
>
> At first, I thought it was just giving a garbage location while trying to
> find some satellites, but now that I've plotted it...
>
> It too
In the case of compasses, a balanced needle tends to tilt to align with the
vertical as well as horizontal component of the earth's magnetic field - so
it's level at the equator, north end low in the northern hemisphere, and
south end low in the southern hemisphere. But you want the needle level s
Congratulations ;-}
Most of the time, it's rather difficult to get a GPS working at high
latitudes...
- Original Message -
From: "Hal Murray"
To:
Sent: Friday, April 16, 2010 12:08 AM
Subject: [time-nuts] GPS receiver stuck at South Pole :)
I've got a Garmin GPS 18 USB. (18, no
Hal Murray wrote:
I've got a Garmin GPS 18 USB. (18, not 18x) It's inside. I'm not surprised
when it fades out.
At first, I thought it was just giving a garbage location while trying to
find some satellites, but now that I've plotted it...
It took about 7 hours to fly from here to the sou
I've got a Garmin GPS 18 USB. (18, not 18x) It's inside. I'm not surprised
when it fades out.
At first, I thought it was just giving a garbage location while trying to
find some satellites, but now that I've plotted it...
It took about 7 hours to fly from here to the south pole. The latitu
FWIW.A good high quality compass needs to be designed based on
what region of the earth you plan to use it in. The Suunto ones I have
are marked with a US region code.
-Brian, WA1ZMS
On Apr 15, 2010, at 7:58 PM, Kit Scally wrote:
Craig,
If memory serves me correctly, Philips "better
Craig,
If memory serves me correctly, Philips "better quality" PAL colour TV's
in the late 70's to early 80's "inverted" the CRT for us in the Southern
Hemisphere. The TV's were clearly marked as such on the packing box.
For reasons unknown, Japanese-made colour TV's never seemed to have this
Didnt read that far .. bet your right.
> error in title
>
> 390183043415
>
> I just don't have the room for it or a 5061A mate
>
> disclaimer: no assoc with seller other then as a customer
>
> -pete
>
___
time-nuts mailing list -- time-nuts@febo.com
To
Interesting writeup like its a variable power supply.
Or it is and the pix is wrong
On Thu, Apr 15, 2010 at 2:59 PM, Pete Lancashire wrote:
> error in title
>
> 390183043415
>
> I just don't have the room for it or a 5061A mate
>
> disclaimer: no assoc with seller other then as a customer
>
> -p
I believe RTL was 3.6V. But I could be wrong, it has happened.
John WA4WDL
--
From: "Mike Feher"
Sent: Thursday, April 15, 2010 2:32 PM
To: "'Discussion of precise time and frequency measurement'"
Subject: Re: [time-nuts] lunatic fringe time
error in title
390183043415
I just don't have the room for it or a 5061A mate
disclaimer: no assoc with seller other then as a customer
-pete
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To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/
I also have a bunch of them. I made one of my first (the first actually used
tubes and an RC network) electronic keyers using those Fairchild devices. To
the best of my recollection they are standard 5 volt devices. Brings back a
lot of memories well over 40 years ago. They were not around for that
Hi
The only real limit on a Johnson counter is how clever you get making sure
that only one stage is a 1 and all the rest are zeros. There are *lots* of
ways to take care of that, each with it's own set of trade offs.
Bob
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-
Hi John:
Yes RTL and 3.3 V if I remember correctly.
Have Fun,
Brooke Clarke
http://www.PRC68.com
jmfranke wrote:
Wasn't that a RTL 923 and 914? I still have a few from my learning days.
John WA4WDL
--
From: "Brooke Clarke"
Sent: Thursday,
Wasn't that a RTL 923 and 914? I still have a few from my learning days.
John WA4WDL
--
From: "Brooke Clarke"
Sent: Thursday, April 15, 2010 11:24 AM
To: "Discussion of precise time and frequency measurement"
Subject: Re: [time-nuts] lunatic
Hi Didier:
When working with high speed data, for example an IDE hard drive, where
there are parallel data lines you get into the same problem as you have
with a shaft encoder where there are parallel binary data lines. In the
case of the shaft encoder mechanical misalignment can cause huge e
A bit off topic, but likely interesting to time-nuts:
In the early days of HDTV (late 80s - early 90s) we were at a European
trade show and had to borrow, at the last minute, a large (~40")
CRT-based HD monitor from a Dutch company that was also exhibiting
there. We liked it so much that we purc
Hi Joe:
Yesterday I deselected SV09 and this morning the RAIM error message was
being displayed.
I've just enabled SV09 and deselected SV14 and will see what happens
when SV14 rises.
Have Fun,
Brooke Clarke
http://www.PRC68.com
J. L. Trantham wrote:
Brooke,
I tried to reply to your post
I believe Gray code was invented to support absolute mechanical position
encoders, where the speed of the electronics is high compared to the speed of
the hardware being monitored. It eliminates the potentially large error between
two positions since only one bit changes at a time. This is done
Hi
If you have a THz clock rate, what ever you are using for logic will be
running "at the limit". The counter you implement would need to be a
fundamentally fast design. That limits your options. Things like Gray code
counters are inherently slower than ripple counters or Johnson counters.
Bob
On Thu, Apr 15, 2010 at 07:30:27AM -0400, Bob Camp wrote:
> Hi
>
> I'm not 100% sure I understand exactly what you are thinking about setting up.
This is completely theoretical at this point. Just the required geometry
size would be prohibitive.
> My guess is that the counter needs to run at th
Hi
I'm not 100% sure I understand exactly what you are thinking about setting up.
My guess is that the counter needs to run at the same THz speed as the
oscillator. That's pretty fast. I suspect that what ever you use, speed /
propagation delay in the counter it's self will be an issue. That wi
On Thu, Apr 15, 2010 at 02:48:58AM -0700, Hal Murray wrote:
> I'm not aware of anything like I think you are describing.
>
> What problem are you trying to solve?
>
> The main reason that I think of using gray codes is for crossing clock
> domains.
>
> But as Magnus pointed out, another possib
If you're not looking for DIY / surplus stuff, check Schomandl or Hopf
in Lüdenscheid
http://www.schomandl.de/en/
http://www.hopf.com/en/index.html
Eugen Leitl schrieb:
Hi -- a couple somewhat lunatic questions. Figured this would
be the best place to ask.
Anyone aware of a time standard which
> Unrelated, anyone aware of a hardware (IC) counter which counts in a
> (local-bitflip) Gray code, so it can track a very fast (integrated?)
> oscillator without dropping cycles?
I'm not aware of anything like I think you are describing.
What problem are you trying to solve?
The main reason
The shaker system I used to know of, was used to test early mobile phone
network test systems (with CRT monitors in) that were intended for
"mobile" use, and no magnetic field leaked out of that one. It was the
size of a small refuse bin, stood about 2' high, (3' dia) verticaly on
the floor, bolte
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