NO OUTDOOR AERIAL

Radio Record, Volume I, Issue 4, 12 August 1927, Page 12

NO OUTDOOR AERIAL

LOOP A GOOD SUBSTITUTH: Residents in flats who cannot use an outdoor aerial cau employ a loop or fraine aerial with good results on a multivalye set over long distances, ‘he Joop or frame aerial will operate well with a neutrodyne or Browning-Drake ‘set, The loop may be used on either of these sets in the same fashion as an antenna or a regular loop. ‘The following methods are illustrative of the antenna methods. (1)-One end of the loop may be connected to the antenna post and the other terminal left open. The regular ground is left on. (2)-Both terminals of the loop may he connected together anl thence to the antenna post. The ground is still left connected. (5)-One terminal of the loop may be connected to the antenna post. The other terminal of the loop jnay be con-

nected to the stationary plate post of a known variable condenser ‘Ihe rotary plate post of this condenser is then conuected to the ground post. The ground may or mayenot be connected. The last method when using the loop as an antenna, is to connect both terminals of the loop to the antenna and the ground posts, shunting the terminals with a kuown variable condenser. Again the connection of the ground is. optional. Now as to which connections to employ wlien using the loop as a regular loop. Wither four binding’ posts or a double circuit jack will. be needed. When using the posts, connect the beginning and the end of the secondary winding to two posts. Connect’ the stationary and the rotary plate posts of Ahe condenser that originally shunted this secondary to another pair of posts opposite to those just installed and. connected. When desiring to use the loop, connect the loop terminals to the posts connected to the condenser posts. When desiring to use the antenna and ground, short these posts with strips of bus bar.- When using the jack, the inner terminals are connected to. the beginuing and the end of the secondary winding. ‘The top-terminal (should be near the end of the secondary winding) is connected to the grid post. The hottom terminal (near the end of secondary winding) is brought to the A minus post.