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Components and Circuits For discussions about component types, alternatives and availability, circuit configurations and modifications etc. Discussions here should be of a general nature and not about specific sets. |
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21st Nov 2020, 7:28 pm | #1 |
Nonode
Join Date: May 2016
Location: Cornwall, UK.
Posts: 2,315
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Dual linked banana plugs?
What would one use these for?
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21st Nov 2020, 7:55 pm | #2 |
Octode
Join Date: May 2003
Location: Belper Derbyshire
Posts: 1,910
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Re: Dual linked banana plugs?
Good evening,
I have seen similar links used for bench or lab type power supplies. They are for the option of mains earthing a floating DC output or for linking the voltage/current sense feedback connections on a stabilised power supply. Christopher Capener
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Interests in the collection and restoration of Tefifon players and 405 line television |
21st Nov 2020, 9:03 pm | #3 |
Heptode
Join Date: Aug 2009
Location: Liverpool, Merseyside, UK.
Posts: 704
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Re: Dual linked banana plugs?
If they are 19mm spacing they can be used for shorting the input terminals on multimeters to show any deviation from zero on ohms range before calibration.
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21st Nov 2020, 9:17 pm | #4 |
Octode
Join Date: Jul 2009
Location: Cheshire, UK.
Posts: 1,706
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Re: Dual linked banana plugs?
You mean 3/4" (19.05mm) or 1/2" if they are the miniature version.
Shorting bars are still available; https://uk.farnell.com/pomona/5145/s...33?ost=2526733 David |
22nd Nov 2020, 8:14 am | #5 |
Dekatron
Join Date: Jul 2009
Location: Sleaford, Lincs. UK.
Posts: 7,638
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Re: Dual linked banana plugs?
I've seen similar jumpers but 1/4" jacks for patching on a patch bay,maybe these had a similar function as there are quite a few of them? They look bespoke and well made.
Andy.
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Curiosity hasn't killed this cat...so far. |
22nd Nov 2020, 11:15 am | #6 |
Nonode
Join Date: Jan 2016
Location: Stafford, Staffs. UK.
Posts: 2,529
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Re: Dual linked banana plugs?
We used versions of those on breakout boxes. You unplug a control module from the wiring, and put the breakout box and leads between the CM and wiring. All wires run to a pair of 4mm sockets, with one of these bridges or jumpers linking the two sides together. You can then easily probe each line, or pull out the jumper and probe either side, or inject other signals. That way you can fault find the system, check out behaviour under fault conditions and so on.
EDIT: This is what we used: https://uk.rs-online.com/web/p/banan...ctors/4321705/ Last edited by duncanlowe; 22nd Nov 2020 at 11:21 am. |
22nd Nov 2020, 11:08 pm | #7 |
Nonode
Join Date: Oct 2014
Location: West Midlands, UK.
Posts: 2,181
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Re: Dual linked banana plugs?
duncan- similar to what we used in GPO TRS ,with output in centre on audio panels to give us a test point on ( usually) OB circuits.
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23rd Nov 2020, 2:01 am | #8 |
Heptode
Join Date: Feb 2010
Location: Heysham, Lancashire, UK.
Posts: 665
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Re: Dual linked banana plugs?
I use insulated versions of these links to set output voltage, earth connections, etc on an isolation transformer, see photos.
(I’m afraid the unit is in need of a clean - it’s been in the garage for a while) Stuart |
24th Nov 2020, 12:06 am | #9 | |
Dekatron
Join Date: Feb 2007
Location: Lynton, N. Devon, UK.
Posts: 7,061
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Re: Dual linked banana plugs?
Quote:
4mm for the plug is a hard metric size... I can't see the standard spacing for the twin version being 19.05mm rather than 19mm. They also exist in twin-4mm to BNC. When I have laid out a panel, I've always used 19mm. However, as the difference between 19mm and 3/4" is only 0.05mm, I might have been wrong, and just got away with it. I'd love to know! |
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