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

Alan Hochhalter alanh137 at gmail.com
Sun Dec 14 15:07:00 EST 2014

The 58503A in the picture on leapsecond.com looks very similar to my older
34401A DVM which doesn't have separate feet.  The molded plastic pieces on
both ends have those crenelations that serve the same function.


On Sun, Dec 14, 2014 at 12:46 PM, Dr. David Kirkby (Kirkby Microwave Ltd) <
drkirkby at kirkbymicrowave.co.uk> wrote:
> On 14 December 2014 at 19:32, Bob Camp <kb8tq at n1k.org> wrote:
> >> 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.
> >
> > Bob
> I am not sure if you are following me. On most (all??) HP kit I have
> seen, there are 3 holes at each corner of the bottom, where is
> possible to fit feet if one is going to use it on a desktop, rather
> than a rack. This unit does not have those holes, so it would be
> impossible to fit the usual HP feet on it.
> Looking around, I have 15 bits of HP kit,  all of which have holes in
> the corner for feet. But this 58503A, with the Chinese box, does not
> have the holes. I don't know whether the 85053A is supposed to have
> them, or whether this is just a flaw in the design of the counterfeit.
> Dave
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