Steve's Antique Technology

Steve's Antique Technology
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My Collections (Select Below):
Antique and Vintage Radios
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Slide Charts, Wheel Charts and Calculators
Slide Charts
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Electronic and Radio Related
Reference Charts

IRC Resistor Color Code IRC Resistor Color Code
This chart from International Resistance Company (better known as IRC) shows the resistance color markings for their early "Dog Bone" resistors. The card is one sided.
No date is marked on the chart but these type of resistors were used in radio construction from the 1920s through the mid 1930s.

Size: 3¼" X 6¾"
Larger Photo

Cornell-Dubilier Card This Cornell-Dubilier chart shows the six and three dot RMA Standards color code for their mica capacitors on one side and the Joint Army - Navy Standard color code on the other.

Size: 2¾" X 4¾"
Larger Photo

Sangamo capacitor chart This Sangamo capacitor chart shows the three and six dot RMA Standards and proposed color code for their mica capacitors. The card is folded with a cover and three charts.
No date.

Size: 3" X 10" unfolded

Transitron Color Band Guide Transitron Subminiature Glass Diode Color Band Guide with instructions on back.


Size: 4" X 8½"
Front and Back

Slide Charts
Wheel Charts
Reference Charts


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