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RESISTANCE BOX, PLUG TYPE Range 1-1000, Total 1110, No. of Coils 13 (0386)
Same specifications as per RESISTANCE BOX, PLUG TYPE but with non-inductively wound coils of manganin wire, double silk covered with resistances adjusted to high precision. Accuracy ? 0.05%.
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RESISTANCE BOX, PLUG TYPE Range 1-5000, Total 11110, No. of Coils 16 (0386)
Same specifications as per RESISTANCE BOX, PLUG TYPE but with non-inductively wound coils of manganin wire, double silk covered with resistances adjusted to high precision. Accuracy ? 0.05%.
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RESISTANCE BOX, PLUG TYPE Range 1-10000, Total 21110, No. of Coils 17 (0386)
Same specifications as per RESISTANCE BOX, PLUG TYPE but with non-inductively wound coils of manganin wire, double silk covered with resistances adjusted to high precision. Accuracy ? 0.05%.
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POST OFFICE BOX, PLUG TYPE (0387)
Plug type, in polished teak wood box with hinged lid and black bakelite panel lined in white colour to show circuit connections. Coils of resistance wire, double silk covered, are wound non-inductively and have a negligible temperature co-efficient. Three pairs of ratio arms are each 10, 100, 10000 and resistance arms contains 16 coils from 1 to 50000 with infinity plug. Total value 11,1100. Two spring keys having special contact for battery and galvanometer fitted. Accuracy of coils 100 to 5000 ? 0.05% and of the resistance coils ? 0.1%.
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POST OFFICE BOX, PLUG TYPE Coils of Constantan Wire (0387)
Plug type, in polished teak wood box with hinged lid and black bakelite panel lined in white colour to show circuit connections. Coils of resistance wire, double silk covered, are wound non-inductively and have a negligible temperature co-efficient. Three pairs of ratio arms are each 10, 100, 10000 and resistance arms contains 16 coils from 1 to 50000 with infinity plug. Total value 11,1100. Two spring keys having special contact for battery and galvanometer fitted. Accuracy of coils 100 to 5000 ? 0.05% and of the resistance coils ? 0.1%.
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POST OFFICE BOX, PLUG TYPE Coils of Manganin Wire, more accurate (0387)
Plug type, in polished teak wood box with hinged lid and black bakelite panel lined in white colour to show circuit connections. Coils of resistance wire, double silk covered, are wound non-inductively and have a negligible temperature co-efficient. Three pairs of ratio arms are each 10, 100, 10000 and resistance arms contains 16 coils from 1 to 50000 with infinity plug. Total value 11,1100. Two spring keys having special contact for battery and galvanometer fitted. Accuracy of coils 100 to 5000 ? 0.05% and of the resistance coils ? 0.1%.
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POST OFFICE BOX, WHEATSTONE BRIDGE (0388)
For accurate determination of unknown resistance or comparison of resistance of two or more conductors. Decade dial type, with 6 dials (two dials having 4 ratio arms - one fraction and others in multiple of 1, 10, 100 and 10000) and four dials with decade resistance units, total resistance 11,1100). Coils of resistance wire, double silk covered, is wound noninductively. It is fitted with two enclosed tapping keys for battery and galvanometer. Accuracy ?O.1% of unit coils.
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POST OFFICE BOX, WHEATSTONE BRIDGE Coils of Constantan Wire (0388)
For accurate determination of unknown resistance or comparison of resistance of two or more conductors. Decade dial type, with 6 dials (two dials having 4 ratio arms - one fraction and others in multiple of 1, 10, 100 and 10000) and four dials with decade resistance units, total resistance 11,1100). Coils of resistance wire, double silk covered, is wound noninductively. It is fitted with two enclosed tapping keys for battery and galvanometer. Accuracy ?O.1% of unit coils.
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POST OFFICE BOX, WHEATSTONE BRIDGE Coils of Manganin Wire, more accurate (0388)
For accurate determination of unknown resistance or comparison of resistance of two or more conductors. Decade dial type, with 6 dials (two dials having 4 ratio arms - one fraction and others in multiple of 1, 10, 100 and 10000) and four dials with decade resistance units, total resistance 11,1100). Coils of resistance wire, double silk covered, is wound noninductively. It is fitted with two enclosed tapping keys for battery and galvanometer. Accuracy ?O.1% of unit coils.
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RESISTANCE BOX, DECADE, DIAL TYPE, METAL (0389)
Comprises circular dials mounted underneath a metal cover plate, inside sturdy aluminium extrusion case. Each dial has 10 resistances, with a knob at the top which rotates with positive click stop to select the desired value as indicated alongside index mark on the knob. Provided with a pair of 4mm sockets for connecting the resistances across a circuit and a yellow socket for earthing. Multiple dials are connected in series to add to the total resistances of each dial. Accuracy ?1%
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RESISTANCE BOX, DECADE, DIAL TYPE, METAL One Decade. (0390)
Comprises circular dials mounted underneath a metal cover plate, inside sturdy aluminium extrusion case. Each dial has 10 resistances, with a knob at the top which rotates with positive click stop to select the desired value as indicated alongside index mark on the knob. Provided with a pair of 4mm sockets for connecting the resistances across a circuit and a yellow socket for earthing. Multiple dials are connected in series to add to the total resistances of each dial. Accuracy ?1%. 0-100Ω x 10Ω.
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RESISTANCE BOX, DECADE, DIAL TYPE, METAL Two Decades. (0391)
Comprises circular dials mounted underneath a metal cover plate, inside sturdy aluminium extrusion case. Each dial has 10 resistances, with a knob at the top which rotates with positive click stop to select the desired value as indicated alongside index mark on the knob. Provided with a pair of 4mm sockets for connecting the resistances across a circuit and a yellow socket for earthing. Multiple dials are connected in series to add to the total resistances of each dial. Accuracy ?1%. 0-100Ω x 10Ω, 0-10Ω x 1Ω i.e. Total Resistance is 110Ω.
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RESISTANCE BOX, DECADE, DIAL TYPE, METAL Three Decades. (0392)
Comprises circular dials mounted underneath a metal cover plate, inside sturdy aluminium extrusion case. Each dial has 10 resistances, with a knob at the top which rotates with positive click stop to select the desired value as indicated alongside index mark on the knob. Provided with a pair of 4mm sockets for connecting the resistances across a circuit and a yellow socket for earthing. Multiple dials are connected in series to add to the total resistances of each dial. Accuracy ?1%. 0-100Ω x 10Ω, 0-1000Ω x 100Ω, 0-10KΩ x 1KΩ i.e. Total Resistance is 11,100Ω = 11.1KΩ.
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RESISTANCE BOX, DECADE, DIAL TYPE, METAL Four Decades. (0393)
Comprises circular dials mounted underneath a metal cover plate, inside sturdy aluminium extrusion case. Each dial has 10 resistances, with a knob at the top which rotates with positive click stop to select the desired value as indicated alongside index mark on the knob. Provided with a pair of 4mm sockets for connecting the resistances across a circuit and a yellow socket for earthing. Multiple dials are connected in series to add to the total resistances of each dial. Accuracy ?1%. 0-10Ω x 1Ω, 0-100Ω x 10Ω, 0-1000Ω x 100Ω, 0-10KΩ x 1KΩ i.e. Total Resistance is 11,110Ω = 11.11KΩ.
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RESISTANCE BOX, DECADE, DIAL TYPE, METAL Five Decades. (0394)
Comprises circular dials mounted underneath a metal cover plate, inside sturdy aluminium extrusion case. Each dial has 10 resistances, with a knob at the top which rotates with positive click stop to select the desired value as indicated alongside index mark on the knob. Provided with a pair of 4mm sockets for connecting the resistances across a circuit and a yellow socket for earthing. Multiple dials are connected in series to add to the total resistances of each dial. Accuracy ?1%. 0-10Ω x 1Ω, 0-100Ω x 10Ω, 0-1000Ω x 100Ω, 0-10KΩ x 1KΩ, 0-100KΩ x 10KΩ i.e. Total Resistance is 111,110Ω = 111.11KΩ.
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