[time-nuts] Quartzlock E10-MRX

[Richard Katsch]

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 measured the temperature other than a finger test that indicates
that more than 5 secs is uncomfortably hot. At that point I switched it off.

Best regards
Richard

On Tue, 1 Sep 2020 at 19:02, Hugh Blemings <hugh at blemings.org> wrote:

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> Hiya,
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> I'd wondered this also - my (limited) experience of Rbs are the
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> LPROs and they definitely need a heatsink (I have a nice story to
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> share about getting some made one day which I must write up, but I
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> digress)
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> Curious, I dug around a bit and only data I can find is a two
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> pager on the manufacturer website -
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> https://www.quartzlock.com/product/Rubidium/rubidium-oscillators/E10-MRX
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> The packaging itself doesn't appear to be designed with
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> heatsinking in mind, but perhaps there is an implicit expectation
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> of convection cooling at least to keep it manageable ?
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> Any idea what case temperature you're seeing @Richard ?
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> Cheers,
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> Hugh
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> On 1/9/20 5:01 pm, Matthias Welwarsky
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> wrote:
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> On Dienstag, 1. September 2020 07:15:34 CEST Richard Katsch wrote:
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> Hello All,
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> I have acquired a Quartzlock E10-MRX Rb 10 MHz standard. It appears to lock
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> and produce a nice sine wave that stays in phase with my Trimble Tbolt for
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> a time which exceeds my attention span!!!
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> It does however get hot in operation. As this is my first experience with a
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> Rb standard I don’t know whether this is normal or indicates that I need a
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> heat sink.
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> Any comments would be appreciated.
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> They're supposed to run hot, but excess temperature will degrade the stability
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> and shorten the lifetime of the electronics. It's hard to recommend what
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> heatsink they require if you have no documentation. Typically you'll need one.
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> My LPRO-101 need a heatsink with < 2K/W of thermal resistance to keep the
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> temperature in check.
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> BR,
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> Matthias
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> Regards
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> Richard Katsch
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> VK2EIK
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