Products > Test Equipment
Why rotary-tip on 4mm banana plugs?
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mawyatt:

--- Quote from: The Soulman on September 08, 2024, 03:22:25 pm ---Anyone used these style as sold by ab-precision?



--- End quote ---

We have similar types with the Blade Jack. These are OK except one must be very careful inserting in typical DMMs, the blade tips catch the edge of the Copper DMM socket. More of an issue with KS and Keithley than Siglent.

Also we've experienced all the issues mentioned with the various types of Banana Plugs/Jacks, even recently having a pair of new Pomona 1269 BNC to Banana Adapters become intermittent. Traced to a contaminated metal connection between the shell and blades on the Banana Jack, Pomona/Fluke Engineering was alerted to this (likely a bad batch).

Banana Jacks/Sockets are of many varieties, and many are from cheap sources, some OK, some not. It's a minefield out there wrt to all the various Banana types.

Best,
tggzzz:

--- Quote from: The Soulman on September 08, 2024, 03:22:25 pm ---Anyone used these style as sold by ab-precision?



--- End quote ---

Staubli SLS4-B  SLS4-B/N  SLS4-B/E SLS4-B/E/N 30 VAC ~ 60 VDC / max. 19 A

I like them after I saw them being used on an HP3458A (albeit in a non-professional setting), by people that do know what they are doing. Stupidly, I didn't ask them why.

I hypothesise it is a relatively large contact area, low thermal mass, and gold plating.
mawyatt:

--- Quote from: tggzzz on September 08, 2024, 04:28:44 pm ---
I like them after I saw them being used on an HP3458A (albeit in a non-professional setting), by people that do know what they are doing. Stupidly, I didn't ask them why.

I hypothesise it is a relatively large contact area, low thermal mass, and gold plating.

--- End quote ---

Correct :-+

Best,
RoGeorge:
I've always thought that is to help rotating the cable without wearing out the connector.
Honestly, don't like them.  Also curious what's with all the fruit and animals naming.  ;D

Banana plugs, crocodiles, parrot-beak hooks, alligator wires, crocodile clamps, etc, etc.
IanB:

--- Quote from: MrCAL on September 08, 2024, 09:09:01 am ---What's the advantage of the rotary-tip on some banana plugs?
One might argue it just add one more "problematic" connection-point?
--- End quote ---

I very much dislike them for this reason.


--- Quote from: sleemanj on September 08, 2024, 09:34:50 am ---I have had too manu bad connections from the springy spinny ones (admittedly cheap ones), I even soldered a batch of them once to stop them spinning because they were so bad.

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I soldered all of the spinning cage test leads I have because I got so fed up with the high resistance and unreliable contact. After soldering the connection became very reliable.
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