=  NOW 35 WPM  =  TEXT IS FROM APRIL 2023  QST  PAGE 50 =

ASK DAVE COAX CABLES, BAND NOISE, AND A 6 METER JPOLE ANTENNA A STEALTHY 6
METER VERTICAL Q HOW DO I KEEP THE BASE OF A JPOLE ANTENNA FOR 6 METERS AS
LOW AS POSSIBLE TO AVOID UPSETTING MY HOA?  A FIRST, LETS DISCUSS
POLARIZATION ON 6 METERS.  ON 6 METERS AND ABOVE, IT IS CONVENTIONAL THAT
FM IS VERTICALLY POLARIZED, AND ALL OTHER MODES, COLLECTIVELY CALLED WEAK
SIGNAL MODES, ARE HORIZONTALLY POLARIZED.  IF YOU INTEND TO WORK SOMEBODY
LOCALLY, YOU WILL WANT TO FOLLOW THIS CONVENTION.  HOWEVER, IF YOUR SIGNAL
BOUNCES OFF THE IONOSPHERE FOR LONG DISTANCE WORK, THE INITIAL POLARIZATION
DOES NOT MATTER.  THE JPOLE ANTENNA CONSISTS OF TWO PARTS.  ONE IS A
HALFWAVE DIPOLE.  THE OTHER IS THE QUARTERWAVE TRANSMISSION LINE MATCHING
NETWORK.  THE QUARTERWAVE TRANSMISSION LINE HAS TWO PARALLEL WIRES OR
COPPER PIPE.  THIS IS A QUARTERWAVE STUB THAT IS SHORTED AT ONE END.  AT
THE SHORTED END THERE IS ZERO IMPEDANCE, WHILE THE TOP END HAS A VERY HIGH
IMPEDANCE.  THIS HIGH IMPEDANCE POINT IS USED TO FEED THE ENDFED HALFWAVE
DIPOLE.  THERE IS NOTHING TO INDICATE THAT THE ENDFED DIPOLE NEEDS TO BE IN
THE SAME DIRECTION AS THE MATCHING STUB.  YOU CAN BEND THE ANTENNA TO 90
DEGREES.  YOU CAN LAY OUT THE MATCHING STUB HORIZONTALLY, A COUPLE OF FEET
OFF THE GROUND WHERE IT WILL BE COMPLETELY HIDDEN, AND THEN PUT THE
HALFWAVE DIPOLE ABOVE IT.  THE LENGTH OF THE MATCHING STUB IN FEET IS
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