LOOP ANTENNA ASSEMBLY

 

When connecting the PVC lightly sand  both ends before applying PVC cement.

 

Install the four  27 3/4"  1 1/4" PVC  to the cross.

 

Install the tee, as per the picture, to one of the 27 3/4" sections. On the bottom.

 

Install the three elbows, as per the picture, to the three remaining 27 3/4" sections.

 

Install the 4 3/4" PVC to the elbows, and the tee.

 

Install the 1 1/4" caps, do not cement the one on the tee at this time. This is so you can have access to the wires when pulling then to the center of the cross.

 

Install the 6" PVC to the bottom of the tee.

 

Install the male adapter to the bottom of the 6" PVC.

 

Install the floor flange to the center of the 2' by 2' plywood.

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Drill a hole, in the 4 3/4" section connected to the tee, large enough to push the #14 wire through, next to the tee, on the underside. Also drill one next to the cap, on the underside.

 

Feed about 4' of  the #14 wire into the hole next to the tee, this will be pulled up to the center of the cross, on the inside of the PVC .

 

Wrap the #14 wire around the 4 3/4" sections 21 times. Cut wire leaving about 4' to feed into the hole next to the cap.

 

Feed the 4' of the #14 into the hole next to the cap, on the tee 4 3/4" section.

 

Drill a hole large enough to pull two #14 wires in the back center of the cross.

 

Push the wires on the inside of the PVC up to the center of the cross, do this through the male adapter, pull the wires out the hole in the back center of the cross.

 

Cement the cap on the 4 3/4 tee section.

 

Screw the antenna assembly to the floor flange on the plywood 2' by 2'.

 

Mount the barrier strip on the inside bottom of the box, 3" length of the box, with super glue.

 

Drill a hole in the bottom of the box, above the barrier strip, to bring the two #14 wires from the cross, into the box. Pull the two #14 wires into the box, cut and hook up to the barrier strip.

 

Super glue the box to the cross.

 

Mount the SO-239 socket on the lid of the box so that it does not hit the barrier strip when installed on the box. Wire the socket to the antenna wires on the barrier strip.

 

For 24 khz use .0276 ufd of capacitance to tune the loop. Hook this across the antenna leads on the barrier strip.

 

Cut off one of the PL-259 plugs on the 50' lead in cable, and install the 1/8" mono plug. This will plug into the Gyrator II receiver.

Capacitance to tune the loop for other frequencies.

 

khz                     ufd

 

21.4                   .0346

 

24                      .0276

 

24.8                   .0257

 

26.1                   .0233

 

27                      .0218

 

30.6                   .0166