=  NOW 40 WPM  =  

RESULTS IN A REDUCTION OF NOISE, TURN ON THE BREAKERS ONE BY ONE.
IF TURNING ONE OF THEM ON CAUSES THE INTERFERENCE TO RETURN, FIGURE
OUT WHAT IS ON THAT CIRCUIT IN YOUR HOME.  YOU MAY BE ABLE TO APPLY
SOME FERRITE BEADS ON THE POWER CORD TO THAT DEVICE.  IF THIS
TECHNIQUE DOES NOT WORK, FIND AN OLD AM TRANSISTOR RADIO, AND WALK
AROUND YOUR NEIGHBORHOOD TO SEE WHERE THE NOISE IS THE STRONGEST.
IT COULD BE A TRANSFORMER, AN ELECTRICAL POLE, OR PRETTY MUCH
ANYTHING.  REMOVING 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 DETERMINED BY THE USUAL FORMULA OF 1/4 L 234/F, WHERE F
IS THE FREQUENCY IN MEGAHERTZ ASSUMING A VELOCITY FACTOR OF 0R95 IN
WIRE.  THE LENGTH OF THE HALFWAVE DIPOLE IS DETERMINED BY 1/2 L
468/F.  NOTE THAT BECAUSE THE 6 METER BAND IS VERY WIDE, A SINGLE
DIPOLE MAY NOT COVER THE ENTIRE BAND.  IF YOU ARE GOING TO PUT THE
HALFWAVE DIPOLE RISER IN A TREE, FOR EXAMPLE, USE INSULATED WIRE.
THE DIMENSIONS FOR THIS CAN ALSO BE DETERMINED BY USING THE
DIMENSIONS FOR A 2 METER J POLE AND SCALING UP.  THE 50 FEED POINT
MAY NEED TO BE DETERMINED BY TRIAL AND ERROR.  FIGURE 1 SHOWS HOW
SUCH AN ANTENNA CAN BE INSTALLED.  NOTE THAT THIS ANTENNA DOES NOT
REQUIRE RADIALS AND CAN BE MOUNTED AT ANY HEIGHT, ALTHOUGH I
RECOMMEND THAT IT BE A FEW FEET ABOVE THE GROUND AT LEAST.  THIS
TECHNIQUE OF FOLDING THE MATCHING STUB TO THE SIDE WILL ALLOW YOU TO
MAKE J POLES ON ANY FREQUENCY, INCLUDING HF BANDS.  RG 8X FOR SHORT
JUMPERS Q WHAT DO YOU RECOMMEND FOR SHORT PATCH CABLES IN THE SHACK?
I AM USING LOWLOSS LMR400 COAX FOR MY ANTENNA FEEDS.  SHOULD I USE
LMR400 FLEX TYPES, OR SOMETHING SMALLER?  A ASSUMING WE ARE TALKING
ABOUT HF, USING THE LMR400 FROM YOUR SHACK TO YOUR ANTENNAS
=  END OF 40 WPM TEXT  =  QST DE W1AW  <