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End Insulators
The kit includes a pair of insulators for connecting supporting string to the antenna ends that are formed from small
sections of coil material.
Attach these by simply twisting or tying a knot the ends of the wire around the rings.
After final tuning of the antenna is completed, the wire can be secured to the insulators with tape or heat shrink to
prevent slippage during use.
Tuning the Dipole
Note: a horizontal dipole will have an impedance of approximately 75 Ohms so the best match may be 1.5 SWR.
First, set up the antenna in the chosen configuration (dipole, Inverted V, V, etc) and test. It is recommended to try
the antenna at a few heights and different configurations before cutting the wire.
The inner, 20M section will probably not need trimming in most cases.
If it does, trim it first from the center insulator connections in small increments (1" or so) and trim each side
equally, rechecking SWR after each adjustment.
Once the antenna is giving a good match on 20M, move on to trimming the outer sections for best 40M match.
Depending on how the antenna will be used (height, configuration, etc) the length of the outer section of the
antenna will likely need to be adjusted for best match on 40M.
Note: Before trimming the outer sections, we recommend that you first try tightly coiling or wrapping up some of
the antenna end back on itself. This electrically shortens the antenna and may provide sufficient effective
shortening to provide a low SWR without any trimming.
Note: Configuration and height above ground will affect the match, especially on 40M.
An antenna analyzer makes tuning the antenna easier but it can also be adjusted by checking the SWR at the lower
and upper end of each band.
If the SWR is higher at the highest frequency, then the outer section is too long.
If not, and tightly wrapping up a bit of the end does not improve the match, trim a small amount (1" or less at a
time) from each side of the antenna and retest.
Note: It is important to test carefully and verify the need for trimming and be very careful not to remove too much
and in most situations, it should not be necessary to cut the outer section shorter than approximately 8 ft 3 inches.
Congratulations, your Pacific Antenna 2040 dipole kit. is now complete!
If you have any questions, please contact us:
q rpkits.com@gmail.com
Thanks from the Pacific Antenna Team!
2040DipoleV2_20180214
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