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Exporter, Supplier Post Office Boxes Plug Type
Post Office Boxes Plug Type
The 3-Ratio P.O. Box has sixteen non-inductively wound coils 1, 2, 2, 5, 10, 20, 20, 50, 100, 200, 200, 500, 1000, 2000, 2000, 5000 ohms and two proportional arms each with coils of 10,100 and 1000 ohms. The 4- Ratio P.O. Box has sixteen coils as above and three proportional arms each with coils of 1,10,100 and 1000 ohms. Also incorporates infinity gap. Heavy superior quality double brass terminals are provided and panel is clearly engraved with the nominal resistance values. Two spring keys having good contact for battery and galvanometer is also provided. The whole system is contained in a superior quality teak wood box. Constantan coil accuracy 0.2%
Catalogue No. Specification Unit Enquiry
10.a
Constantan Coil 3 Ratio
Each
10.b
Constantan Coil 4 Ratio
Each
 
 
   
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