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Radio Record, Volume II, Issue 8, 7 September 1928, Page 30

Sulution for Daniel Cells. (COON STRUCTORS of the Daniel cell, gravity type, are reminded that the strength of acid solution should not be stronger than 1 of acid to 40 of water, and as weak a solution as 1 in 80 works very ‘satisfactorily. and is often stated as the correct strength. Short-wave Coil Connections. Ww EN connecting up coils in a shortwave receiver it should be remembered that the side of the primary ¢onnected to the aerial goes towards the secondary coil, and the side of the secondary coil connected to the. grid is placed towards the aeria] coil. The side of the tickler away from the secondary connects te the. plate. The winding of al) coils must be executed in the same direction ,