I have a Quartzlock 3 that was an OCXO based 10Mhz standard.
It has a really nice distribution amp so I replaced the OCXO with
an LPRO-101 and added a fan. The switching power supply is
external. I’m sure some will cringe with the thought of a fan in
the enclosure but it works really well and
I have the data for the E10-MRX taken from the 2012 online catalogue.
The case temperature is specified as <45C (after 1 hour, Tamb +25C , no
ventilation).The base plate temperature is rated from -30~+85C Operating
temperature range -20~+50C. Typical figures -30~+65C.
I have never had the
Hi
The one thing you don’t want to do is play with insulation. There are two ovens
in a
normal Rb. Their temperatures are close to each other. It will not work if the
temperatures
are equal ( = there are reasons for the delta).
Since the two ovens are right up against each other, there is
Many thanks for the responses.
The take-home message that I've got is that it may be OK to run the device
with no heat sink but it's life might be extended by adding one. As it cost
~$300 it would be nice to get the maximum use from it.
I think what I shall do is to measure, or estimate, the
Hi
With an Rb, you have a magnetic shield (somewhere) as part of the overall
design. In some cases, this is worked into the outer package shell (… it’s
cheaper to do that way. ). There’s only so much you can do to move the parts
of the unit around.
=
A fan will not “move” the baseplate
Taka,
There's not much really wrong in making the oven(s) work harder to maintain
the desired Rb cell
temperatures because of a cooler baseplate temperature. If the thermal
design is done well, nothing
will run appreciably hotter and most of the electronics will run cooler.
However, it is my
If you can open the case, you should be able to locate the largest board
(if there is more than one) where most of the conventional electronics is
located and devise a way to keep that part of the case cool, with a fan, a
heatsink or both. The physics package is designed to run hot but if too
much
If it works, don't try to fix it.
In the datasheet
https://quartzlock.com/userfiles/downloads/datasheets/e10-mrx(2)(1).pdf
there is no cooling requirement specified.
I would assume that it is usually mounted on a PCB which adds some
cooling though not terribly much.
After 1 hour the case
Hi
If you have enough room for a heatsink that is the size of a couple of shoe
boxes, then
by all means use a convection heatsink.
There is zero difference between cooling by fan vs big heatsink as far as
device current
consumption is concerned. This or that level of cooling takes the
Will you elaborate on fan? Just about everything I've read, use of fan was
discouraged. Natural convection over heat sink fins were recommended. I've
done limited testing. When fan cooling, indeed temperature will go down, but
current consumption stays higher indicating heating is often
Hi
In this case there may not be much that can be done. In the more general case
( = a unit with a surface that mates to a heatsink) , it’s well worth doing
something.
I have an unfortunate lot of empirical evidence (on FRK’s and LPRO’s ) showing
that
a “no heatsink” setup is one with a
On Dienstag, 1. September 2020 14:25:31 CEST Richard Katsch wrote:
> Many thanks Matthias,Hugh.
>
> The case doesn’t seem to have any direct method of fastening to a heatsink
> but something can be arranged I’m sure. The manufacturer’s documents don’t
> suggest anything. They do say that the base
Many thanks Matthias,Hugh.
The case doesn’t seem to have any direct method of fastening to a heatsink
but something can be arranged I’m sure. The manufacturer’s documents don’t
suggest anything. They do say that the base temperature can be up to 85
degrees C which seems awfully hot.
I haven’t
Hiya,
I'd wondered this also - my (limited) experience of Rbs are the LPROs
and they definitely need a heatsink (I have a nice story to share about
getting some made one day which I must write up, but I digress)
Curious, I dug around a bit and only data I can find is a two pager on
the
On Dienstag, 1. September 2020 07:15:34 CEST Richard Katsch wrote:
> Hello All,
> I have acquired a Quartzlock E10-MRX Rb 10 MHz standard. It appears to lock
> and produce a nice sine wave that stays in phase with my Trimble Tbolt for
> a time which exceeds my attention span!!!
> It does however
Hello All,
I have acquired a Quartzlock E10-MRX Rb 10 MHz standard. It appears to lock
and produce a nice sine wave that stays in phase with my Trimble Tbolt for
a time which exceeds my attention span!!!
It does however get hot in operation. As this is my first experience with a
Rb standard I
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