Inductance Boxes

a) Fixed Inductance Boxes :-  Science Labs The air cored Inductance coils are fitted in metal cabinet nicely finished. The frequency response is 1000 C/s. The accuracy is + 1% 1) 100 Micro henry to 1000 Micro henry any single desired range. 2) 1 Milli henry to 10 Milli henry, any single desired range. 3) 10 Milli henry to 100 milli henry any single desired range. 4) 100 Milli henry to 1 Henry any single desired range. b) Single Dial Inductance box :  1) 100 Micro Henry to 1000 Micro Henry, 2) 1 Milli henry to 10 Milli Henry  3) 10 Milli Henry to 100 Milli Henry, 4) 100 Milli Henry to 1000 Milli Henry 5) 1 Henry to 10 Henry. c) Two dial inductance Box :-  1) 100 Micro Henry to 10 Milli Henry 2) Milli Henry to 100 Milli Henry 3) 10 Milli Henry to 1000 Milli Henry 4) 100 Milli Henry to 10 Henry. d) Three Dial Inductance Box :-  1) 100 Micro Henry to 100 Milli Henry 2) Milli Henry to 1000 Milli Henry 3) 10 Milli Henry to 10 Henry e) Four Dial Inductance Box :-  1) 100 Micro Henry to 1 Henry 2) 1 Milli Henry to 10 Henry. f) Mutual Inductance Outfit :-  1) On Hylem Panel. Rayleigh Compound Key Incorporated. Complete with 4 Plug round commutator and Standard Resistance coil 0.1 ohms  2) Extra for Mutual Inductance coil of 250 turns in primary and 1000 turns in secondary.