[time-nuts] Ventilation of HP 58503A GPS time & frequency reference receiver

Bob Camp kb8tq at n1k.org
Sun Dec 14 14:32:02 EST 2014


> On Dec 14, 2014, at 2:14 PM, Dr. David Kirkby (Kirkby Microwave Ltd) <drkirkby at kirkbymicrowave.co.uk> wrote:
> On 14 December 2014 at 02:31, Bob Camp <kb8tq at n1k.org> wrote:
>> Hi
>> You see a lot of surplus HP gear with the feet pulled. That was pretty standard when gear was rack mounted.
>> Bob
> There are not the usual 3 holes underneath where feet go.

I understand that they are different. The problem is the same though. Pulling a box in and out of a rack with feet or bumpers on it is a pain. They often get “lost” early in the instrument’s life. Often it’s a standard process on all gear as it comes into the facility.  All of the un-needed bits and pieces go into a big pile. When the feet (or whatever) are found later in life they may or may not be re-installed correctly. They might not even be the ones that came with the instrument. 


> I would nice to be able to find a few photos of a real 58503A. Does
> anyone have a known genuine one?
> I suspect this will go back to China, so I'm not going to spend much
> time on it, but I have slid the the case back 25  mm or so, to get a
> bit more ventilation. The electronics runs much cooler. I would not
> want it to overheat before it gets back to China.
> Dave
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