Shera Board. This is a complete board already populated.
Also an Oncore UT+ and EGG H176B 10 MHz osc (drop in replacement for HP
10811 or 10544 series)
Please contact Henry, KT1J if interested at:
[EMAIL PROTECTED]
73,
Mike, N1JEZ
A closed mouth gathers no feet
Subject line sez all. Picked this up recently with some other GPS
related stuff.
Google hasn't been my friend on this-at least so far!
Picture here.
http://homepages.ihug.co.nz/~tractorb/ashtech.jpg
I've taken the top cover off the metal box and its sitting on the
scanner next to the exposed
Hi Dave,
it look's like an Astech G8 board. This board used the Philips SAA1575 GPS
chip set. Designed for low-cost navigation solutions.
regards
Martin
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Dear Time Nuts,
This post was time ago but at this moment I'm working on my FE-5680.
I had to replace a 74HCT74 IC inside the unit to get the 1 PPS out.
Now I'm wondering what the other pins are used for. As far as I have
figured out now the following pins are used:
1 +15V
2 gnd
3
I had to replace a 74HCT74 IC...
1 +15V
HCT runs at 5V. I'd expect smoke if you really have 15 V there.
Now I'm wondering what the other pins are used for.
I don't know anything about the FE-5680A, but a 74x74 for most values of x is
a dual FF. The data sheets are widely available on
I suppose an answer could be Time will tell
It's better than Because I can
-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On
Behalf Of Thomas A. Frank
Sent: Tuesday, March 13, 2007 7:32 PM
To: Discussion of precise time and frequency measurement
Subject: Re:
This brings the following story back in my mind:
When I was a student at the university of Bochum/Germany the department
of physics owned an electron synchrotron and storage ring. Not really a
big gun in international terms but with 800 MeV energy also not exactly
a child's toy. Once a year the
On Wed, 14 Mar 2007 16:56:29 +0100, you wrote:
Dear Time Nuts,
This post was time ago but at this moment I'm working on my FE-5680.
I had to replace a 74HCT74 IC inside the unit to get the 1 PPS out.
Now I'm wondering what the other pins are used for. As far as I have
figured out now the
I got the same from eBay. It's a Magellan - Ashtech G8, info at
ftp://ftp.magellangps.com/OEM,%20Sensor%20%20ADU/g8/Reference%20Material/
I have not turned on mine yet...
Didier KO4BB
Dave Brown wrote:
Subject line sez all. Picked this up recently with some other GPS
related stuff.
Google
I just stumbled on an excellent tutorial on low-noise clocks --
National Semiconductors free downloadable [1]Clock Conditioner
Owner's Manual. This 88 page document is a 3.7 MB PDF.
73 de Tom, K3IO
References
1.
Tom Clark, K3IO wrote:
I just stumbled on an excellent tutorial on low-noise clocks --
National Semiconductors free downloadable [1]Clock Conditioner
Owner's Manual. This 88 page document is a 3.7 MB PDF.
73 de Tom, K3IO
References
1.
I was just investigating this very issue. It seems that every program
you use to compute these impedances comes up with different answers,
sometimes wildly different. Anyone have a free program they trust
with this sort of thing?
Matt
On 3/14/07, Dr Bruce Griffiths [EMAIL PROTECTED] wrote:
Matt Ettus wrote:
I was just investigating this very issue. It seems that every program
you use to compute these impedances comes up with different answers,
sometimes wildly different. Anyone have a free program they trust
with this sort of thing?
Matt
On 3/14/07, Dr Bruce Griffiths
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