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General Vintage Technology Discussions For general discussions about vintage radio and other vintage electronics etc. |
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12th Jun 2018, 11:51 am | #41 |
Nonode
Join Date: Jan 2010
Location: North Somerset, UK.
Posts: 2,129
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Re: A quiz, old time colour codes.
I have met a colour code used specifically for theatre and event electrics, used to identify the length of cables.
Based LOOSELY on the resistor colour code. 1m=brown 10m=brown brown 100= brown brown brown 2m=red 20m=red red 25m=red green 50m=green And so on. This scheme has the merit of not using black which would not show up on black power cables. Grey which would not show well on grey data cables is little used since neither 8m nor 80m are common lengths. |
13th Jun 2018, 9:07 am | #42 |
Nonode
Join Date: Mar 2008
Location: Aberdeen, UK.
Posts: 2,853
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Re: A quiz, old time colour codes.
Pink wires/Sleeves.
I remember that Pink Sleeves - Hellerman Sleeves - were in common use in the RAF back in the early 60's, and back into the 50's I guess. Along with Hellerman Pliers & Black marking ink. In general, colour wise, in the post-war years , companies used whatever they had left over from the 30's &/or heaps of ex military wiring. Regards, David |
17th Jun 2018, 8:15 pm | #43 |
Banned
Join Date: Dec 2013
Location: Middlewich, Cheshire, UK. & Winter in the Philippines.
Posts: 3,897
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Re: A quiz, old time colour codes.
Time to publish the material I have.
From Wireless and Servicing Manual, W T Cocking. Mains Transformer Colour Code. Primary. 0V Black, 10V tap Black & Green, 210V tap Black & Yellow, 230V tap Black & Red, 250V tap Black & Brown. Rectifier Heater. Green and Green with Green & Yellow centre tap. HT Red and Red with Red & Yellow centre tap. Valve Heaters. Brown and Brown with Brown & Yellow centre tap. Additional LT. Blue and Blue with Blue & Yellow centre tap. I must try to follow this code next time I construct something. Sam. |
17th Jun 2018, 8:38 pm | #44 |
Banned
Join Date: Dec 2013
Location: Middlewich, Cheshire, UK. & Winter in the Philippines.
Posts: 3,897
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Re: A quiz, old time colour codes.
And now Colour Code for Battery Connections. Same source.
Highest HT+, +B max, Red 2nd highest HT+, +B int, Maroon & Red 3rd Highest HT+, +B det, Maroon Negative HT, -B, Black with Red tracer Positive LT, +A, Yellow Negative LT, -A, Black with Yellow tracer Positive GB, +C, Green Maximum Negative GB, -C max, Black with Green tracer 2nd Negative GB, -C low, Black & Green Loudspeaker High potential lead, Brown Loudspeaker Low potential lead, Black with Brown tracer Then there is the Loudspeaker Colour Codes. Outside lead of output transformer Primary, Green Inside lead Primary, Brown Centre tap of Primary, Red Outside of Secondary, White Inside of Secondary, Maroon Outside of 1st Field Winding, Yellow Inside of 1st Field Winding, Black Tap on 1st Field Winding, Grey Outside of 2nd Field Winding, Grey Inside of 2nd Field Winding, Blue So there we are, lots of fairly useless information, but who knows, we may find a use for it. Sam. |