1296 Loop Yagi Dimensions - NTMS

.25" .25"LengthThe parts provided by NTMS include 1/4” .032 aluminum strips for the loops. The strips are about10.5” long and have one of the holes for mounting the loops punched in one end. Figure 1 shows thecompleted strip ready for mounting. The strips are sharp and can be smoothed by hand sanding or aDremmel tool at slow speed with a rough drum sander tool (use eye protection). You should first checkthe measurements of the punched hole in one end to insure it is 1/4” center to edge of the strip and alsomake sure that the strip has not been mangled by the shear. Table 1 gives the proper lengths of thestrips. A 6 ft version will only use 22 directorsElementsLengthR1-R2 10.23”DE (brass) 9.59”D1-D11 8.81”D12-D17 8.55”D18-D25 8.25”D26-D42 8.25”Table 1. Strip Lengths for 12 ft boomBoom Element Positions:Table 2 gives the boom element positions for both 6' and 12' antennas. You may measure and drill youown boom using a #32 clearance drill bit for the #4 stainless steel screws or use a templet made for thepurpose of ¾” EMT conduit. The ¾” boom will slip inside the conduit. See Ross Pounders (K5ZSJ)for use of the templet. W5LUA has a similar boom drilling fixture using 1” square aluminum angle.N5AC also has a suitable boom jig.