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General Vintage Technology Discussions For general discussions about vintage radio and other vintage electronics etc. |
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21st Feb 2021, 8:41 pm | #1 |
Heptode
Join Date: Nov 2018
Location: Staffordshire Moorlands, UK.
Posts: 595
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Help with a wiring diagram
Good evening all,
Would somebody let me know what the broken/dashed line is on the attached diagram please. Thank you. |
21st Feb 2021, 8:46 pm | #2 |
Octode
Join Date: Jul 2004
Location: Dundee, UK.
Posts: 1,797
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Re: Help with a wiring diagram
It shows that the two switch poles are mechanically linked and so must operate together.
PMM |
21st Feb 2021, 8:51 pm | #3 |
Heptode
Join Date: Nov 2018
Location: Staffordshire Moorlands, UK.
Posts: 595
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Re: Help with a wiring diagram
As usual a prompt response on the forum.
Thank you. Brian |
22nd Feb 2021, 8:33 pm | #4 |
Heptode
Join Date: Feb 2021
Location: Edinburgh, Scotland, UK.
Posts: 528
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Re: Help with a wiring diagram
Normally denoted a Douple Pole Single Throw (DPST) switch.
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22nd Feb 2021, 9:51 pm | #5 |
Heptode
Join Date: Feb 2021
Location: Edinburgh, Scotland, UK.
Posts: 528
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Re: Help with a wiring diagram
I noticed the typo too late to edit...
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22nd Feb 2021, 10:59 pm | #6 |
Moderator
Join Date: Mar 2012
Location: Fife, Scotland, UK.
Posts: 22,798
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Re: Help with a wiring diagram
You'll see the same sort of thing showing ganged potentiometers or ganged capacitors linked together. Sometimes a switch linked to a pot (eg vol control with on/off switch)
David
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23rd Feb 2021, 9:11 am | #7 |
Dekatron
Join Date: Sep 2011
Location: Rugeley, Staffordshire, UK.
Posts: 8,809
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Re: Help with a wiring diagram
By the way, to be correct, that is a 'circuit diagram' or 'schematic diagram'. A wiring diagram is used to show the wireman building it, or a repairman the physical layout of the wiring. Also sometimes called a layout diagram. Just for info.
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24th Feb 2021, 11:25 am | #8 |
Heptode
Join Date: Nov 2018
Location: Staffordshire Moorlands, UK.
Posts: 595
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Re: Help with a wiring diagram
Thank you for your posts; very helpful.
No problem stevehertz; I always like to know correct terminology/descriptions. Brian |
25th Feb 2021, 3:42 am | #9 | |
Dekatron
Join Date: May 2010
Location: Greater Manchester, UK.
Posts: 18,675
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Re: Help with a wiring diagram
Quote:
Mechanically linked switch contacts are called "poles". "Gangs", in the context of switches, is reserved as the collective noun for individual switches mounted together.
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25th Feb 2021, 4:23 am | #10 |
Nonode
Join Date: Jan 2010
Location: North Somerset, UK.
Posts: 2,129
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Re: Help with a wiring diagram
Terminolgy is not allways consistent in such matters.
A "3 gang" light switch is generally understood to mean 3 electrically independant switches mounted on the same faceplate. Widely used for three lights in the same room. 3 switch contacts operated by the same rocker or knob would be called a 3 pole switch (used to isolate bathroom extract fans with a neutral, fixed live, and switched live) "Ganged potentiometers" however is generally understood to mean two potentiometers operated by the same shaft. For example to alter the volume of both channels of a stereo amplifier with a single control. 2 gang potentometers are common, more than 2 gang do exist but are rare. Older editions of the wiring regulations DID call for a "ganged switch" to isolate the incoming electricity supply to a building. This was what we now call a 2 pole switch. Very early types were two physically seperate switches with a wooden rod that linked the operating handles. |
25th Feb 2021, 9:37 am | #11 |
Moderator
Join Date: Mar 2012
Location: Fife, Scotland, UK.
Posts: 22,798
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Re: Help with a wiring diagram
I very carefully used the word 'Ganged' for pots and capacitors, but I said 'linked' for a combined switch/pot unit. I never even mentioned multi-pole switches by any name.
David
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