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Re: Series 1 & 2 boxes (was Seeking Spring Nuts for Series 1 cabinet)

 

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Thank you, Jeff, for finding that catalog page.


So the old vacuum-tube instruments like the 428 and 606?are?pre-System, cast side panel?boxes like the 5245 and 740 are?System I, and cabinets with corner rails like the 339A?are System II.


"System III" may be my defective memory. ?Somebody will know.


Dave Wise

From: [email protected] <[email protected]> on behalf of Jeff Kruth via groups.io <kmec@...>
Sent: Tuesday, April 21, 2020 1:55 PM
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment]Series 1 & 2 boxes (was Seeking Spring Nuts for Series 1 cabinet)
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Well, I was wrong and Robert corrected me. What I thought were System II were System I cases (not series), checked my 1976 Catalog, page 475 . They had no nomenclature for the earlier ones.??

So what is a System III case? I have heard mention of it.

Jeff

In a message dated 4/21/2020 2:38:06 PM Eastern Standard Time, kmec@... writes:

Hi Dave!
Series One is the 200C, etc, series of rounded corner cabinets that housed Rack mount instruments. The 340 Noise figure meter is an example that comes to mind: A puce cabinet that is held in place by 2 set crews under the front edge that allows the cabinet to slip off and reveal a 19 inch rack panel inside, ready to bolt up. There were smaller instruments like the 200 CD, the 428A clip-on ammeter, 425A DC Microvoltmeter. Othe cases were the 608A-F Sig Gen, 606A/B sig gen, etc.
The series 2 were cases like the 432A power meter and the 8640B sig gen, 8690 sweeper, 141T Spec An, etc. These used the cast aluminum side rails.

Regards,
Jeff

In a message dated 4/21/2020 1:01:13 PM Eastern Standard Time, david_wise@... writes:

??Thank you, Jeff! ?I only need two. ?I'll send you my address off-list.

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Now I'm confused. ?If I'm Series 2 (cast Al sides), then what was Series 1? ?Is there a cheat sheet, or representative example models?

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Thanks,

Dave Wise

From: [email protected] <[email protected]> on behalf of Jeff Kruth via groups.io <kmec@...>
Sent: Tuesday, April 21, 2020 9:48 AM
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] Seeking Spring Nuts for Series 1 cabinet

I have a stash from scrapping HP stuff. How many do you need? Also isnt the 740 a series 2 cabinet? With the cast Aluminum side rails, etc?

Jeff

In a message dated 4/21/2020 11:49:16 AM Eastern Standard Time, david_wise@... writes:

The top and bottom covers of the 740B are secured by screws which go through 6-32 J-style?spring nuts clipped onto the side panels. ?Except I'm missing some of them. ?The manual doesn't mention them.

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These particular?spring nuts (speed?nuts, clip nuts, Tinnerman nuts, J-nuts, U-nuts)?seem to be obsolete or custom-made; I can't find anything to match.

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The sticking point is the?1/8-inch panel depth.

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All I can find?are for a 1/16-inch?panel.

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Got any leads?

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Thanks,

Dave Wise

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PS: I think U-style would work as well as J-style.
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