On 03/24/2010 03:18 PM, Magnus Danielson wrote:
Fellow time-nuts,
...
Second, anything I should keep in mind as I power one up?
...
Cheers,
Magnus
There's a bit of discussion in the archives about the need for a heat
sink, and also about the whether it's necessary to anneal the case in a
Leigh L. Klotz, Jr WA5ZNU wrote:
On 03/24/2010 03:18 PM, Magnus Danielson wrote:
Fellow time-nuts,
...
Second, anything I should keep in mind as I power one up?
...
Cheers,
Magnus
There's a bit of discussion in the archives about the need for a heat
sink, and also about the whether it's
Fellow time-nuts,
I am a curious mind, which should come as no big supprise, and I know
that lots of people have looked deeply into these devices before me.
So, first of all I wonder, what other commands than SCr and F=32-bit
hex numberCr is there? Anything fun? Anything useful? Anything
, March 24, 2010 6:18 PM
To: Discussion of precise time and frequency measurement
Subject: [time-nuts] FEI FE-5680A
Fellow time-nuts,
I am a curious mind, which should come as no big supprise, and I know
that lots of people have looked deeply into these devices before me.
So, first of all I wonder
Bob Camp wrote:
Hi
If it's the same magic gift as I got - some of them have a very unusual
smell. It sort of makes you wonder where this stuff may have been stored.
The magic gift smells of soap.
If you have one of the hand converted ones that puts out 10 MHz you might
consider an
Jeroen et al,
Apologies for my late reply to this message - I've been out
of the country for a week. I managed to get a copy of some 5680A
documentation from John Cuthbertson at FEI. It is a Word document,
and specific to the units with Option 2, but it might be of help.
It is in a
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
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
Hmmm...
Seems parts of this discussion have gone offline.
Posting this reply, I made, to the group.
-Rex
On Mon, 19 Sep 2005 07:09:10 -0500, Brian Kirby [EMAIL PROTECTED]
wrote:
I would love to look at a dump of the EPROM, but I have no way to dump
it myself, at the moment.
Anybody else,
In message [EMAIL PROTECTED], Rex writes:
I did some tracing on the board this morning. I don't think there is
going to be anything enlightening in the eeprom. It doesn't seem to have
any on-board interface to the rubidium. All of its control pins seem to
go to the big external connector J2 as
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