Nostalgic Kits Central

Heathkit Test Equipment Matrix

Substitution Boxes

Codes
= Picture
= Specifications
= Calibration
= Block Diagrams
-  = No data

Model Number Description Notes Picture Specs Info Docs 1st Year Last Year
CS-1 Condenser Substitution Box 0.00001 mfd to 0.22 mfd. - - 53 62
DC-1 Decade Capacitor Box 100 Pf to 0.111 mfd - - 52 61
DR-1 Decade Resistor Box Resistor decade type wood box - - 56 61
EU-30A Substitution Box 6 knobs - - - - 70 70
EUW-28 Resistor Substitution Box Resistor 1 knob - - - 67 70
EUW-29 Capacitor Substitution Box Capacitor 1 knob - - - 67 70
EUW-30 Resistor Substitution Box (Same as IN-17) - - - 68 -
EWU-28 Substitution Box 1 knob - - - - 67 70
IN-11 Resistor Substitution Box decade type - Schematic - - - 61 67
IN-12 Resistor Substitution Box - - - - 62 67
IN-17 Resistor Substitution Box decade type new look - Schematic - - - 67 78
IN-21 Capacitor Substitution Box decade type - Schematic - - - 61 67
IN-22 Capacitor Substitution Box - - - - 62 67
IN-27 Capacitor Substitution Box 3 knobs - - 67 77
IN-37 Resistor Substitution Box decade type - new look - - 67 78
IN-47 Capacitor Substitution Box new look - - - 67 78
IN-3117 Resistor Substitution Box same as IN-17 - Schematic - - 91 -
IN-3127 Capacitor Substitution Box same as IN-27 - Schematic - - - 81 -
IN-3137 Resistor Substitution Box same as IN-37 - - - 77 81
IN-3147 Capacitor Substitution Box same as IN-47 - - - 77 81
RD-1 Resistor Substitution Box decade type - - - 50 52
RS-1 Resistor Substitution Box 15-ohms to 10-megohm - - 52 62