UK Vintage Radio Repair and Restoration Powered By Google Custom Search Vintage Radio and TV Service Data

Go Back   UK Vintage Radio Repair and Restoration Discussion Forum > General Vintage Technology > Components and Circuits

Notices

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.

Closed Thread
 
Thread Tools
Old 21st Nov 2020, 7:28 pm   #1
Uncle Bulgaria
Nonode
 
Uncle Bulgaria's Avatar
 
Join Date: May 2016
Location: Cornwall, UK.
Posts: 2,315
Default Dual linked banana plugs?

What would one use these for?
Attached Thumbnails
Click image for larger version

Name:	IMG_20201121_182703.jpg
Views:	236
Size:	44.7 KB
ID:	220929  
Uncle Bulgaria is offline  
Old 21st Nov 2020, 7:55 pm   #2
high_vacuum_house
Octode
 
high_vacuum_house's Avatar
 
Join Date: May 2003
Location: Belper Derbyshire
Posts: 1,910
Default 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
__________________
Interests in the collection and restoration of Tefifon players and 405 line television
high_vacuum_house is offline  
Old 21st Nov 2020, 9:03 pm   #3
Outrun_uk
Heptode
 
Join Date: Aug 2009
Location: Liverpool, Merseyside, UK.
Posts: 704
Default 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.
Outrun_uk is offline  
Old 21st Nov 2020, 9:17 pm   #4
factory
Octode
 
Join Date: Jul 2009
Location: Cheshire, UK.
Posts: 1,706
Default Re: Dual linked banana plugs?

Quote:
Originally Posted by Outrun_uk View Post
If they are 19mm spacing.....
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
factory is offline  
Old 22nd Nov 2020, 8:14 am   #5
Diabolical Artificer
Dekatron
 
Diabolical Artificer's Avatar
 
Join Date: Jul 2009
Location: Sleaford, Lincs. UK.
Posts: 7,638
Default 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.
__________________
Curiosity hasn't killed this cat...so far.
Diabolical Artificer is online now  
Old 22nd Nov 2020, 11:15 am   #6
duncanlowe
Nonode
 
Join Date: Jan 2016
Location: Stafford, Staffs. UK.
Posts: 2,529
Default 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.
duncanlowe is offline  
Old 22nd Nov 2020, 11:08 pm   #7
Oldcodger
Nonode
 
Join Date: Oct 2014
Location: West Midlands, UK.
Posts: 2,181
Default 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.
Oldcodger is offline  
Old 23rd Nov 2020, 2:01 am   #8
stuarth
Heptode
 
Join Date: Feb 2010
Location: Heysham, Lancashire, UK.
Posts: 665
Default 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
Attached Thumbnails
Click image for larger version

Name:	CCE93E14-A033-4BE0-AC0D-9ACA3ECE4FF5.jpg
Views:	71
Size:	77.8 KB
ID:	221043   Click image for larger version

Name:	F1D98918-3344-487F-8937-31D96F605A23.jpg
Views:	65
Size:	72.5 KB
ID:	221044   Click image for larger version

Name:	063E7112-289B-4877-B687-2BE9429ABD63.jpg
Views:	51
Size:	77.2 KB
ID:	221046   Click image for larger version

Name:	6D71394D-CADF-44E5-BD90-80C183292189.jpg
Views:	42
Size:	76.9 KB
ID:	221047  
stuarth is offline  
Old 24th Nov 2020, 12:06 am   #9
kalee20
Dekatron
 
Join Date: Feb 2007
Location: Lynton, N. Devon, UK.
Posts: 7,061
Default Re: Dual linked banana plugs?

Quote:
Originally Posted by factory View Post
Quote:
Originally Posted by Outrun_uk View Post
If they are 19mm spacing.....
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
I'm not convinced about that!

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!
kalee20 is offline  
Closed Thread

Thread Tools



All times are GMT +1. The time now is 9:00 am.


All information and advice on this forum is subject to the WARNING AND DISCLAIMER located at https://www.vintage-radio.net/rules.html.
Failure to heed this warning may result in death or serious injury to yourself and/or others.


Powered by vBulletin®
Copyright ©2000 - 2024, vBulletin Solutions, Inc.
Copyright ©2002 - 2023, Paul Stenning.