Products > Test Equipment
My poor mans SMU - The Agilent 66311B
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macboy:

--- Quote from: SKPang on April 06, 2016, 07:11:52 pm ---Got some binding post but it didn't have a hole for the bare wire so I drilled a hole myself.

Didn't want to solder the wires to the PCB so I routed it to the outside. Not as neat but it will do.

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--- End quote ---
Your sense wires should twist around each other, not around the current-carrying wires. Likewise, the current carrying wires should also be twisted with each other. They way you have done this, current fluctuations will induce voltages in the sense wires, messing with voltage regulation and possibly even causing stability issues.
SKPang:
Thank you macboy, good point. I will take it apart and re do the wiring.

FrankE:
Got mine today. No front panel, no knob. I already had ordered the Phoenix connectors
I've no supply rails. +15V -15V. The 5V rails are fine, front display.

F308 (5AM), F310 (5AM)  F303 (5AM) F306 (5AM) seem to have blown. I blew the chassis fuse with my DMM lead, d'oh but at least it was at the mains switch so I won't have blown anything in the DC stages  I've put Littelfuse axial fuses on my next RS order  What do they mean by M suffix on their fuse ratings?
Fuse speed is rated on RS by either T  (time delay), F (fast), FF (very fast)

I think I might have 15V, 5V and +15V regulators somewhere, just in case.

Table 3.3 p32 states to use the R431-4 on A1 board as a common. It's not evident which pin that is because there's no pinout marking on the component or board.

The fan is quite loud isn't it? The Papst is rated at 33m3/h 20CFM. Similar sized case fans are up to 16, so I wonder if the volume is a function of the pitch of the  impeller blades or if a lower air change fan would be sufficient.
 
FrankE:

--- Quote from: TheSteve on April 06, 2016, 08:40:22 pm ---I like the look of the binding posts as well, very much a factory look to them.

--- End quote ---
Yeah, me too. I don't mind a trailing lead from the back but there isn't strain relief unless one cable ties the test lead to the fan grille.
I found 'binding posts' [they are not binding posts just sockets] , that take shrouded leads Hirschmann SAB 2600 series (M4 thread), 2630 (solder pin), 2640 (solder bucket) , Multi Contact XUB (?M4)  Probably others, though I couldn't see Pomona ones Hope they are a proper 5 way and have the transverse hole for hook up wire.
[EDIT: No they are only sockets, i.e no threading to secure spaded leads, or bind hook up wire, no transverse hole for on the fly hook up wire.
If they can't take binding they ain't binding posts.]

If so, saves having duplicate sets of shrouded and bare leads
Seems odd that these have to be hunted down, I would have thought these would be the norm these days, not the exception.
TheSteve:
I used a Pomona # 6883 on a different power supply. They look very similar to what I used on the 63311B but are made of nylon, only 3 dollars or so from Digikey etc and the quality is very nice. They work great for binding posts/banana jacks but certainly do not have a factory look to them.
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