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Radio Record, Volume I, Issue 33, 2 March 1928, Page 12

"Concrete" (Patea) writes:-‘I am thinking of building a loop, aerial. I have all the constructional ‘dope,’ but /am not sure whether mv room, being small, will affect the efficiency of the loop. _ If it is close to the wall will there be any loss in signal strength ?’’ Using a loop acrial indoors, in proximity to a wall or ceiling has the effect of raising the effective 1esistance. The difference in resistance (which spoils reception) when the loop is five feet away from the wall or ceiling, is about 20 or 25 per cett., as compared with that when it is near.