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SPD3303X-E another question regarding binding posts.
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mawyatt:
Believe it or not we needed all 3 SDP3303X and the GPP-4323 and a OPD OPE-QI which had +-120VDC and a couple other voltages. This was during the development of a very complex controller which produced 128 (scalable to 256 and later to over 1000) independent precision channels capable of producing independent bipolar over +-100V Dynamic Arbitrary Waveforms that could be bi-phase modulated, all at ~15bit precision levels! This was for a new type research project for a Phased Array Beam Forming System based upon liquid crystals, hopefully later will lead to a custom chip design.

Best,
Electroplated:
Sounds very interesting, somewhat above my head, I only know the very basics of beam forming and a little of its history but it does demonstrate why sometimes there is a need for a good mix of power supplies, know how to get them to work together and their limitations, not that I'll ever need more than a couple for my meager needs.

rf-loop:

--- Quote from: Electroplated on August 08, 2022, 02:57:27 pm ---Hi rf-loop,

I've used digital needle calipers that go to the metal inserts I get these measurements, best I could do and should have done this sooner !
<clip>
Inserting the calipers into the metal receptacle I get:

reading  left to right:

Neg ch1   4.48 mm
Pos ch1   4.42mm
Gnd         4.37mm
Neg ch2  4.47mm
Pos ch2  4.43mm
Neg ch3 4.47mm
Pos ch3  4.43mm


--- End quote ---

No need think anything but quality control has failed really badly.

With the dimensions mentioned, if they are approximately correct, it cannot be accepted or explained as acceptable in any way. The only claim is: Structural error, completely. (or just random moday morning part... what must not happen) To be rejected. They should be replaced with ones that do not have such a terrible measurement error.  Also they need check all manufatured units if they have get and used bad binding posts from subcontractor (they are Siglent designed)

Recently, when I was doing some home repairs in China, I bought a stone wall drill. I bought an 8mm drill bit. At home I measured it when I noticed the hole was too big. The width of the "hard metal part" of the drill was about 9.2mm --- Chinese 8 millimeters. (the body of the drill was 8 mm... bhuuhh...)

The correct target measurement for lab instruments banana jack would be 4 mm -0.02/+0.06
tautech:

--- Quote from: rf-loop on August 08, 2022, 08:26:37 pm ---The correct target measurement for lab instruments banana jack would be 4 mm -0.02/+0.06

--- End quote ---
Yes it is not rocket science, it is just 4mm.
Just checked two SPD units and all banana sockets on them take the shank of a 4mm HSS drill bit with minimal clearance.
Electroplated:
rf-loop,

Well I said they where a loose fit and those caliper measurements do show the metal inserts or whatever they call them are bigger, not much but enough to cause a loose fit, yes, I now suffer from binding post measurement syndrome, been measuring every 4mm post and plug I can find, I hope its a short lived ailment.

I've had cheap drills that bend or snap or where undersized but cant recall buying one that came with 'free metal gift' at the tip, you must have got yours on bargain day, buy 8mm get 1 flea... I mean free.

--
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