QRPGuys Portable No Tune Half Wave Antenna – $20



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We continue our antenna offerings with this single band, 80m-10m end fed half wave wire antenna. It is designed as a highly portable wire antenna, easily set up as an inverted V, horizontal, sloper, or in the case of higher frequencies, a vertical radiator. Your feed line is essentially the counterpoise, so a separate one is not needed. The high impedance, half wave wire is matched to your 50 ohm feed point by an integral impedance matching toroid transformer, and rated is at 10 watts. The SWR is further broadened and lowered across 80m-10m with a high voltage capacitor on the primary of the transformer using band specific radiator lengths. It is designed to use without a tuner and give an SWR of ≤1.2 for any portion of the band after optimizing the driven element. Our tests have been favorable for ≤2.0 SWR or better for the entire band, except 80m, which can be optimized for the upper or lower portion of the band. The user supplies the 1/2λ wire for attachment to the captive S.S. hardware. A BNC female connector is supplied for connection to your radio. Depending on the gauge wire you opt to use, the radiating element may be stored wrapped around the device for storage and transportation. The device can be tied down on the connection end with the hole provided. On a scale of 1 to 5, this kit is rated at 2 depending on your experience.



Click here for the assembly manual