I'm puzzled. I admit that I don't have a lot of experience with
Rb standards, but I do have a bit of experience with the HP-5065A
Rb standard.
In the 5065A, the entire physics package is enclosed in an oven.
Assuming that your Rb is the same, and I believe it is, your plan
to force the physics
In message 4a2cfce2.5020...@erols.com, Chuck Harris writes:
I ran the device today for about half an hour, and used an infrared
sensing thermometer to measure the external case temperature.
Be very careful about trusting this: you need to do some tricky
calibrations to get anywhere near
Hi Poul,
By replying to my reply to Leigh, and clipping out everything
that I wrote (but my name), you seem to be attributing to me,
what Leigh wrote.
You then rephrased my statement about heaters in the physics
package, restated my statement about extra cooling increasing
the power drawn by
Does anyone has a service manual for the Datron / Wavetek 4910 voltage
standard. The output voltage is correct. I have problems with battery power.
Met vriendelijke groeten, Regards,
ing. Frans de Haan
Haarlem
the Netherlands
___
time-nuts
In message 4a2d129c.3060...@erols.com, Chuck Harris writes:
If you have so much to say to the original author, and nothing to
say about my reply, wouldn't it have been be better to just reply
to his message, instead of mine?
What can I say ? It was early in the morning ?
See also: my .sig
Leigh,
I agree with Chuck. I have both an FE-5650A and an FE-5680A. With the
former I was concerned about the heat, and so ran it only for short
periods, until I understood what was going on. I had the impression from
the data sheet that there were different heatsink options for different
In message be50c3a72eba61449c804b2c8b4ae38101ebb...@neptune.rakon.net, Murra
y Greenman writes:
With the FE-5680A I had the opportunity to study things in more detail.
The PRS10 manual has some good info.
--
Poul-Henning Kamp | UNIX since Zilog Zeus 3.20
p...@freebsd.org | TCP/IP
Hi Poul,
I have long espoused that one should never attribute to malice
that which can be more easily explained by ignorance. So, I didn't
believe malice was involved.
I just found your post curious, that's all.
I'm pretty sure that mornings should be banned.
-Chuck Harris
Poul-Henning
In message: 4a2d60a2.3030...@erols.com
Chuck Harris cfhar...@erols.com writes:
: I'm pretty sure that mornings should be banned.
Perty much... Nobody has a breathalizer to ensure that you are
sufficiently caffeinated to give a good chance of a coherent reply :)
Lord know that would
In message be50c3a72eba61449c804b2c8b4ae38101ebb...@neptune.rakon.net,
Murray Greenman writes:
With the FE-5680A I had the opportunity to study things in more detail.
The PRS10 manual has some good info.
--
Poul-Henning Kamp | UNIX since Zilog Zeus 3.20
p...@freebsd.org |
I'd like to find a copy, too. Same problem, and there doesn't seem to be
replacement batteries that are fit-and-form equivalents.
Thanks,
Steve
On Mon, Jun 8, 2009 at 3:35 PM , Frans wrote:
Does anyone has a service manual for the Datron / Wavetek 4910 voltage
standard. The output voltage
- Original Message -
From: Murray Greenman murray.green...@rakon.com
To: time-nuts@febo.com
Sent: Tuesday, June 09, 2009 6:42 AM
Subject: [time-nuts] FE-5680A thermal management
Leigh,
I agree with Chuck. I have both an FE-5650A and an FE-5680A. With
the
former I was concerned
I have a manual, but it's hard-copy and LARGE. If you can narrow down
your problem area, I'd be happy to scan some schematics.
I also have two 4910's; I can probe some test points if you need some
values.
Bill Ezell
--
They said 'Windows or better'
so I used Linux.
Steve Krull
Almost all rubidium standards DO specify the use of some form of a heat sink.
For the FRK and M100 units this can be a heat sink with around 1 fins or just
bolted to a metal plate or chassis.
The military freq standard that had M100's in them had the unit mounted to a
5x5x.2 aluminum plate
Chuck,
This device is a pull from a larger system, probably a cell site. It's
clearly designed to be mounted on something, as it has lots and lots of
holes around the edge. I suspect there's some thermal management that's
missing. The FEI sheet gives typical data for the 0-50C range, though
Calm down Chuck, your doing it again.
2009/6/9 Chuck Harris cfhar...@erols.com:
Hi Poul,
By replying to my reply to Leigh, and clipping out everything
that I wrote (but my name), you seem to be attributing to me,
what Leigh wrote.
You then rephrased my statement about heaters in the
Hi Leigh,
I just looked at a manual for an EGG Rb standard module, and their spec
is for -55C ambient to +68C baseplate. They had another spec that said
MTBF 90,000 hours at 40C baseplate. Your FEI unit probably has a similarly
worded spec.
To me this means that the ideal (expected)
Leigh L. Klotz, Jr WA5ZNU wrote:
Chuck,
This device is a pull from a larger system, probably a cell site.
It's clearly designed to be mounted on something, as it has lots and
lots of holes around the edge. I suspect there's some thermal
management that's missing. The FEI sheet gives
Also see my post from June of last year where I had measured the heat sink rise
over ambient of several rubidium oscillators in free air... the FEI-5650 was
very close to it's operating limit if operated in free air and not attached to
something:
Hi,
some light might be shed on the heatsink problem by reading the data
sheet for the LPRO 101 (Symmetricom)
The units will have similar issues to cope with.
The LPRO has temperature controlled lamp and filter, at different
temperatures above 80C.
Its power consumption is shown in a chart
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