80/75 Meter 4-Square Array
CLICK ON IMAGES FOR LARGER VERSIONS
		This array has been in use since 1989. The SWR from 3.5 to 3.9 is below 1.5:1 The F/R of the array is 20dB average and with some signals even better.
		View of the 4-Square from the top of one of my towers. (Approx 125 feet high) The radial system consists of 90 1/4 wave long wires attached to the base of each vertical.
		Close-up picture of the support post and base of the vertical. Each vertical is mounted on a 6 inch square by 12 foot long pressure treated post. The posts were buried 4 feet in the ground.
CLICK TO ENLARGE (File Size 100K)		Construction Detail (Revised 4-14-2001) The verticals are 65' tall. 40 feet of 4" and 25 feet of 3" aluminum irrigation tubing. The joint overlap is 1'. I have replaced the UV resistant bale twine (guy ropes) with 3/16" (770lb. tensile strength) UV resistant Dacron rope. You can also find this image on page 9-57 of ON4UN's - Low Band DXing Book, 3rd edition. CLICK HERE to download a Windows MetaFile (.WMF) version of this drawing. (File Size 28K)
CLICK TO ENLARGE (File Size 100K)		Support Post Detail (Revised 4-14-2001) Each support post is 6" x 6" x 12' pressure treated. 4' of the post is in the ground.. The vertical is insulated from the post by PVC electrical conduit. The support arms are made from 1/2" thick Plexiglass (Acrylic) sheet. You can enlarge the image by clicking on it OR download a Windows MetaFile version by CLICKING HERE. CLICK HERE to download a Windows MetaFile (.WMF) version of this drawing. (File Size 28K)
CLICK TO ENLARGE (File Size 100K)		Joint Construction Detail (Revised 4-14-2001) I used a 1 foot overlap at the joint between the 4" and 3" tubing. 3-1/2" Sch. 40 Aluminum conduit (pipe) has to be machined to fit inside the 4" irrigation tubing. 3" Sch. 40 aluminum conduit (pipe) is used to transition from the 3-1/2" conduit to the 3" irrigation tubing. No machining required on this sleeve. CLICK HERE to download a Windows MetaFile (.WMF) version of this drawing. (File Size 28K)
		THUNDERSTORM!! Check out these pictures of a thunderstorm that was a bit too close for comfort. Fortunately the cell didn't move directly over the array. It sure came close though.

3/3 - 40 Meter Stacked Array
CLICK ON THE IMAGES TO ENLARGE
		165 foot tower w/Phillystran guys The top antenna is at 160 feet and the bottom antenna is at 80 feet The 3 element full size yagis were made by DX Engineering (N0XX - Bill Sattler) Boom length 42 feet - longest element 73 feet. Each antenna weighs about 250lbs. Rotators are TIC General 1032 RingRotors
		3el 40m yagi at 80 feet
		The tower and antennas were all pre-assembled on the ground. The entire system (with the exception of the bottom antenna) was installed in one day using a hydraulic crane with a 172 foot maximum vertical lift capability. CLICK ON THE IMAGE FOR MORE INSTALLATION PHOTOS
		The RingRotor Model 1032 Visit TIC General's RingRotor Homepage CL