7-band OCF dipole (new QTH): Difference between revisions
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=== After tightening and raising, 2025-05-18 === | === After tightening and raising, 2025-05-18 === | ||
Rope of short and long ends tied taught to different trees, both ends slightly higher than before. | Rope of short and long ends tied taught to different trees, both ends slightly higher than before. | ||
==== Under antenna ==== | |||
Connected directly to coax. | |||
[[File:20250518194142-80m.png|200px|80m]] | [[File:20250518194142-80m.png|200px|80m]] | ||
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[[File:20250518194142-02m.png|200px|2m]] | [[File:20250518194142-02m.png|200px|2m]] | ||
==== Other side of lightning arrester, nominally grounded ==== | ==== Other side of lightning arrester, nominally grounded ==== | ||
Connected via lightning arrester, which was nominally grounded (ground stake only a few inches into ground—need to find a good position before driving it further into ground). | |||
[[File:20250518194917-80m.png|200px|80m]] | |||
[[File:20250518194917-20m.png|200px|20m]] | |||
[[File:20250518194917-17m.png|200px|17m]] | |||
[[File:20250518194917-12m.png|200px|12m]] | |||
[[File:20250518194917-10m.png|200px|10m]] | |||
[[File:20250518194917-06m.png|200px|6m]] | |||
[[File:20250518194917-02m.png|200px|2m]] | |||
Revision as of 02:45, 21 May 2025
80m 7-band off-center-fed dipole bought from gniklat1 on eBay.
Advertised to work on 80m, 40m, 20m, 17m, 12m, 10m, and 6m (tuner needed to cover all of 80m and 10m), with max power 300W PEP, 150W CW, 75W Digital. Advertised to work best in an inverted V configuration with the center at 25-30ft and ends at 8-10ft above ground. Includes 4:1 voltage balun.
2m SWR measurements below just for fun :)
Suspension
About 10m up. Suspended from pulley attached to top of ~10ft bamboo pole, attached to top of 3rd segment of 3-segment steel antenna mast designed to be ~10m long, but set to be only ~25ft long. Mast a few inches into ground, guy wires tied to spiral ("dog") stakes.
Wiring
Measurements
Initial SWR measurements, 2025-05-17
Antenna in air, rope of short end tied taught to fence, rope of long end tied loosely to tree.
After tightening and raising, 2025-05-18
Rope of short and long ends tied taught to different trees, both ends slightly higher than before.
Under antenna
Connected directly to coax.
Other side of lightning arrester, nominally grounded
Connected via lightning arrester, which was nominally grounded (ground stake only a few inches into ground—need to find a good position before driving it further into ground).
