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ANTENTOP- 02- 2004, # 006  

Old Receiving Magnetic Loop Antennas

 

into a loop in length approximately 200 millimeters, then continue winding.  
 

Basket Loop Antenna of a Simple Suitcase Tube Superheterodyne

 

Fig. 5 shows a basket loop antenna of a superheterodyne  receiver of LW- MW made in a suitcase. The receiver was described in the reference  [5]. The basket magnetic loop antenna is placed on a cover of a suitcase in which the receiver is placed. More slots - more density of winding of the loop.

 

 

The first section of the antenna contains 29 turns, it is winded by a Litz wire 10x0,07 (10 wire in diameter of 0,07 millimeters), as a last resort, this winding can be made by a wire of 0,4-0,5 millimeters in diameter. The first section starts to reel up from the internal part of the form.  The second section of the antenna continues winding the first section, it is winded by a copper insulated wire of 0,2 millimeters in diameter and contains 70 coils. When the antenna works at MW the first section is shortened. At LW both section of the loop antenna are in work.

 

 

Figure 5  Magnetic basket loop antenna of a superheterodyne  receiver of LW- MW

 

 

Magnetic Loop Antenna of a Suitcase Tube Superheterodyne

 

 

Certainly, not only basket loop antennas were used in old receivers. Simple loop antennas were widely used also. A simple superheterodyne LW- MW receiver made in

 

Figure 6 Magnetic loop antenna of a superheterodyne  receiver of LW- MW

 

 

 

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August 7, 2016 20:12

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