Hi
> On Dec 16, 2014, at 4:36 PM, Brian M wrote:
>
> I just power mine off an old 19vdc laptop supply dropped with a linear
> regulator (and filtered) to provide ~17vdc
I think that keeping the internal regulators running is a good idea. The more
stages of stabilization and clean up, the be
I just power mine off an old 19vdc laptop supply dropped with a linear
regulator (and filtered) to provide ~17vdc No 5vdc supply required for
mine. I recall reading that some have an internal 5v regulator. I believe
the way to check is if the lock pin signals and PPS is present without
external 5v
On 16 Dec 2014 23:06, "Bob Camp" wrote:
>
> Hi
>
> What ever you do, take the extra step of checking the baseplate
temperature once you have things up and running. The Rb’s will *work* over
a wide temperature range. The region over which they will last a long time
is a bit more narrow. I seem to h
Hi
What ever you do, take the extra step of checking the baseplate temperature
once you have things up and running. The Rb’s will *work* over a wide
temperature range. The region over which they will last a long time is a bit
more narrow. I seem to have spent a lot of time demonstrating that. K
All,
It's interesting, but I've actually found the FE-5680 I have will power up, and
lock, from just 12v. Sure, takes a bit longer, but it eliminates the need for
the 7812 in the box, etc. I know the 5680 FAQ on ko4bb
(http://ko4bb.com/dokuwiki/doku.php?id=precision_timing:fe5680a_faq#input_vo
Hi Dave,
The ones I have use the following pin out
1 - 15 v
2 - ground
4 - 5 v
5 - ground
7 - 10 mhz
The pot on the side does nothing.
Look in the archives for my and other folks addition of an adjustment pot.
You can also adjust fx via software. Pot is easier.
73,
Bill
I have a coup
Hello,
I've mounted both my LPRO-101 and FE-5680 in Hammond 1590-type cast
aluminum boxes, bolting the rubidium unit to the lid of said box, and
found the heat sinking of the entire arrangement to be entirely
adequate. In each case there is a (well filtered!) switching regulator
present that
Dave wrote:
> I suggest you go to http://www.febo.com/pipermail/time-nuts/ back a couple
> of years and you will find every thing you ever want to know about the FE
> 5680A. Similar to the recent Lucent activity
I did do that, and found various comments about various options, and
people note
On 16 December 2014 at 13:18, Bert Kehren via time-nuts
wrote:
> I suggest you go to http://www.febo.com/pipermail/time-nuts/ back a couple
> of years and you will find every thing you ever want to know about the FE
> 5680A. Similar to the recent Lucent activity
> Bert Kehren
I did do that, and
I suggest you go to http://www.febo.com/pipermail/time-nuts/ back a couple
of years and you will find every thing you ever want to know about the FE
5680A. Similar to the recent Lucent activity
Bert Kehren
In a message dated 12/16/2014 7:21:02 A.M. Eastern Standard Time,
drkir...@kirkbymic
Hi
You are dumping about 15W into the heat sink (or cooling system). You would
like to keep the baseplate at < 40C if possible. In a 25C room, that works out
to a 1 C/W heat sink. If you are using a fan, that’s a pretty small gizmo. If
you are building a metal case and putting other stuff in th
On 16 December 2014 at 12:16, Bob Camp wrote:
> Hi
>
> One fairly important issue - the unit needs to be on a heat sink. If you run
> it without cooling of some sort, it will not run for very many years.
>
> Bob
I do realize that, but how big? Normally "the bigger the better" is
not an unreasona
Hi
One fairly important issue - the unit needs to be on a heat sink. If you run it
without cooling of some sort, it will not run for very many years.
Bob
> On Dec 16, 2014, at 5:22 AM, Dr. David Kirkby (Kirkby Microwave Ltd)
> wrote:
>
> I have a couple of Rb sources bought from China or Hon
I have a couple of Rb sources bought from China or Hong Kong a year or
two ago. I'd like to fix these up. Initially in a box where I can
adjust them to frequency manually, but perhaps later lock them to GPS.
Looking around the web, there are countless options on these things,
and different connecti
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