‰  NOW 30 WPM  ‰  TEXT IS FROM OCTOBER 2018 QST  PAGE 32‰

WITH FLOWABLE SILICON WINDSHIELD AND GLASS SEALER, AVAILABLE AT MOST AUTO
SUPPLY HOUSES.  THE WHOLE ASSEMBLY IS SUPPORTED BY 3/4 INCH SCHEDULE 80 PVC
FASTENED TO THE STEM OF THE PVC T WITH APPROPRIATE ADAPTERS.  THIS IS IN
TURN FASTENED TO A 1 INCH ELECTRICAL METALLIC TUBING EMT SWEEP SUPPORTED BY
A 10 FOOT LENGTH OF 1 INCH EMT, AS SHOWN IN FIGURE 5.  THE DIPOLE IS
MOUNTED VERTICALLY, MAKING IT OMNIDIRECTIONAL WITH VERTICAL POLARIZATION.
IF IT IS MOUNTED HORIZONTALLY, ADVANTAGE CAN BE TAKEN OF THE DIPOLES
DIRECTIVITY TO NULL UNWANTED NOISE SOURCES.  ALL THREADED CONNECTIONS
SHOULD BE SEALED WITH TEFLON TAPE AND ALL GLUED CONNECTIONS SHOULD BE MADE
UP AS IF THEY ARE TO WITHSTAND WATER PRESSURE.  THIS WILL ENSURE THE
WEATHERPROOF INTEGRITY OF THE HOUSING.  THE SUMMING AMPLIFIER WAS MOUNTED
IN A SMALL BOX FABRICATED FROM SCRAP ALUMINUM, SHOWN IN FIGURE 6.  A SMALL
LINEAR POWER SUPPLY WAS INCLUDED IN THE BOX AS WELL AS A 550 KHZ LOW PASS
FILTER THAT CAN BE SWITCHED OUT FOR RECEPTION OF THE AM BROADCAST BAND AND
HIGHER FREQUENCIES.  THE ACTIVE DIPOLE, SEEN IN FIGURE 7 MOUNTED ON
CONDUIT, CAN ALSO BE POWERED FROM BATTERIES OR AN APPROPRIATE WALL WART,
‰  END OF 30 WPM TEXT  ‰  QST DE W1AW  ƒ