UK, Vintage Electronics, Vintage Radio, Surplus Electronics, Test Equipment, Industrial, Scientific, Valves, Roehren, Lampes, Vacuum Tubes, CV Equivalents, Meters, Optical, Books, Wireless, Components, Resistors, Capacitors, Inductors, Ferrite, Cores, Audio Transformers, Fibre Optics, Transducers, Switches, Transistors, Diodes, Trimmers, Plugs, Sockets, Connectors, Pattern 104, Plessey Mk4, Plessey Mk7, Jones, Coax, BNC, UHF, Valve Holders, Cables, Loudspeakers, Antique radios,  Manuals, Hewlett Packard, Marconi, Mullard, Tektronix, AVO, Radio, Television, TV, Repair and Maintenance, Data Sheets, Transistor Equivalents


COLOUR CODES FOR Resistors and Capacitors

1.  RESISTORS  Resistor Codes Resistor Coding

On the older carbon composition and carbon film resistors usually only 3 colours are used in the sequence Body - Tip and Spot .

 Additional bands are for tolerance silver for +10% and gold for +5%.  

A pink band indicates a high-stability component.

Resistor Colour Codes are simple for the 3-colour system but not so memorable when one has 6 bands see below!

Colour_01.jpg (99290 bytes)


And here, below, is the RS data sheet which extends some of the 4th, 5th and 6th band values.

Colour02.jpg (106398 bytes)

2. CAPACITORS - Capacitor codes, Capacitor Coding.

The same colours apply, with the 5th band being working voltage.

The chart below shows how this is applied to the "tropical fish" capacitors.

TropFish_a.jpg (16171 bytes)

    68nF 20% 400V         0.47µF 10% 250V        0.68µF  10% 400V

Colour03.jpg (139734 bytes)