Saturday, February 25, 2023

80m dipole stretched significantly

Very lucky here to have the space, and appropriately placed trees, to allow me to put up a full size dipole for 80m. By all reports it works very well. This week, prompted by VK3LRJ, I tested the antenna and found that resonance had moved down quite significantly.

The band edges (black bars) are 3.5Mhz and 3.8Mhz.

The weekly club net is on 3685 so that's quite a bit away from where the antenna is now. I pulled it down, cut off a bit and folded back the ends. I think I shortened it by about 500m.

Much better! The 7300's built-in tuner has no trouble but it's good to not suffer the losses in the tuner if possible. 

The wire I'm using is figure-8 speaker wire split so I guess it stretches quite a bit. So far it looks to be in good shape but I don't expect it to last forever.

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