2 Element Quad Project

A Different way to construct a tried and true antenna out of PVC. Before you shake your head about PVC go to the PVC and sunlight study. Especially for the 10 meter and higher frequencies. By KB3TTP.

Specifications:

Approximate Resonant Feedpoint Impedance = 135.777 Ohms before added matching section.
Approximate Free-Space Gain = 7.03
Approximate 2:1 VSWR Bandwidth = 8.77% of Design Frequency, 2.493mhz
Approximate >20 dB F-B Ratio Bandwidth =1.782 % of Design Frequency,0.506 mhz
Approximate Rate of Gain Change = 1.196dB per 1% of Design Frequency

Search Engine Submission - AddMe

The Finished Quad.

Boom height is at 29 feet configured in an X shape.

The main mast is 2 1/2 diameter, 1/4 inch thick galvanized pipe.

The secondary mast above the rotator is 1 1/2 inch steel tubing.

A support bearing is used near the top of the secondary mast for extra strength and to protect the rotator.

Primary coax is 8X low loss from the wireman.

An RG11 electrical 1/4 wavelength piece of coax is used as a matching section at the feed point.

Extra struts were added to the quad as a different way to construct it from all pvc pipe and fittings.

Antenna weighs only 21 pounds.

Withstood 50 MPH winds.

The mast to boom coupler is 8 X 12 inch 1/4 inch thick aluminum plate.

There is a support cable at the top of the mast to keep the boom from flexing down at the ends over time.