Product Help

Tuning your Antenna for Best Results

Basics
Do not ASUME the Coax is good.

  • Coax must be 1:1 with dummy load, before you even start the tuning process!
  • New coax may be bad,it must be checked with dummy load to insure it is 50 ohm.
  • Location of the antenna is very important
    Surrounding objects such as trees, power lines, other antennas, etc. will seriously reduce efficiency. To minimize the effects of surrounding objects, mount the antenna as high and in the clear as possible. If metal guy wires are used, they should be. broken with strain insulators.

    Please observe the following procedures, for the best results.

    Temporarily mount the antenna with the boom vertical, reflector at least one foot (30 cm) above ground on a non-metallic support, to prevent detuning the antenna. Guy the top of the boom if necessary to prevent it from falling over. Do not use line with wire in it.

  • Keep other antennas; metal objects and guy lines clear of the antenna under test.
  • Do not attempt to tune the Yagi near the ground with the boom parallel to the ground since ground effects will nullify any adjustment and poor performance may result.
  • Run the coax cable from your transmitter to the area in which the antenna is going to be tested. The length of this cable or your feedline is not critical.
  • 1.Connect a good quality SWR bridge to the end of this cable.
  • 2.Connect a short length of cable 10 ft or less from the SWR Bridge to the antenna.
  • 3.Set the transmitter to your center operating frequency.
  • 4.When you read SWR, be sure you move far enough away from the antenna so that your body does not effect the reading.
  • 5.Measure the SWR.
  • If it is high, move the Shorting Bar and/or Tube by 1/4" (.6 cm) in one direction and check the SWR.
    If the SWR improved, then continue moving the Shorting Bar and/or Tube in the same direction.
    If the VSWR deteriorated then move the Shorting Bar and/or Tube in the opposite direction.
    Repeat this procedure until no further improvement can be made.


    YAGI Construction
  • Yagi Construction Big Element (Reflector) in the back Little Element (Director) in the front!


  • Boom Driven Element has 2 holes 1 mounts the element the other secures the feed bracket!


  • The feed goes together as shipped with the feed bracket between the SO-239 end and the insulator.


    6 Meter Feed Correct Position
  • Insert 1 element into the boom before removing the RED Keper plug.
  • Tighten the Locking Jamb Nut 1/8 turn only.


  • 6 Meter Feed Incorrect Correct Position

     


    P1 Portable
  • The P1 Coil is Blue in color with Yellow tuning ring. If this is not your configuration you have counterfit P1 system.
  • 2 Base Rods all HF configurations, (3 base rods may be need for the lower part of the CW portion of 40 meters).
  • 60-80 Coil adds to BOTTOM of main coil for 75-80 Meters.
  • Counterpoise is half the tuning (it is the other half of the dipole.) EXTRA WIRES ARE NOT BETTER.
  • Do not cut the counterpoise wire, just wind up the extra wire.
  • DO NOT USE ANY TOOLS TO ASSEMBLE THE P1 SYSTEM.
  • THREADS ARE  CUT OVERSIZE SO AS NOT TO BIND UP IN THE FIELD.
  • IT IS NOT NECESSARY TO HAVE THE ASSEMBLY TIGHTENED BEYOND LOOSE HAND TIGHT.
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