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Re: Placing Shelf on Casters for HP Equipment

 

Yeah, hard to know sometimes that what seems second nature to some of us may not be familiar to others. I deal with both DC to microwave electronics and audio, so it's a double whammy for me! The audio racks tend to be less expensive and not as beefy. Audio boxes with single boards inside them and just a few chips don't need nearly as much heft in supporting them as say, a 112 pound HP 8566 spectrum analyzer, as you can imagine.

Another good thing to know is that 1 rack unit (1 RU) = 1.75 inches. That is the smallest (AFAIK) height of a box to be mounted in a 19 inch rack. The two units of the aforementioned 8566 are each 3 RU, or 5.25 inches high. 5 RU is common in microwave instrumentation, as well (8.75 inches tall). I can't think of any even numbered RU height boxes, though.

Good luck in setting up your lab!

Jim Ford

------ Original Message ------
From: "Matt Huszagh" <huszaghmatt@...>
To: "Dave McGuire" <mcguire@...>; [email protected]
Sent: 11/7/2021 7:38:07 PM
Subject: Re: [HP-Agilent-Keysight-equipment] Placing Shelf on Casters for HP Equipment

"Dave McGuire" <mcguire@...> writes:

You're not familiar with 19" racks, which have been ubiquitous in
many industries for about a century?

- test equipment
- computing
- telephony
- sound reinforcement
- pro music gear (synthesizers, audio processing)
- industrial automation
- [probably more that I can't think of offhand]

I'm not trying to talk down to you, man, but I can't see how anyone
who has lived on Earth for awhile couldn't know about these. Heck, my
grandmother suggested to me that I should get one when I was about 14,
in the 80s.
I googled "HP test equipment rack" and the 19" rack popped up. I have
seen these before, though I didn't know the term (or know that it was a
standard). I also did not know that these are what HP, Agilent and
Keysight use for their test equipment racks.

I'm not sure if this is a good excuse but I'm relatively young (< 30)
and only been doing electronics for the last couple years, when I
started teaching myself. I also don't come from an engineering
background, so I've probably missed some things that are evident to
others in the field. I did study physics undergrad though, and research
is one of the places I've come across these. But, none of us were too
concerned that these were called 19" racks.

Matt
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