Sunday 27 May 2018 7:30 am Mt Tumorrama. My homebrew 2.4 GHz Yagi had failed at when I noticed the 2.4 GHz 2.5 watt SG-Lab transverter SWR LED had changed to RED! Hmm.. bugger that wasn’t expected.
I didn’t have time or the tools to repair the antenna so I persisted with my backup antenna a 2.4 GHz Bi-Quad (below). I was pleasantly surprised by the performance of the Bi-Quad by successfully working Al VK1RX/P for two SOTA S2S contacts at VK1/AC-023 and VK2/ST-005, Dimitris VK2COW over a 64 km path and Matt VK1MA/P S2S at Mt McDonald VK1/AC-048 along a 39 km path of multiple 1200 m ASL mountain ranges.
Back to the 2.4 GHz Yagi. Today, using a pair on 2.5 magnification glasses I took a closer look at the folded dipole assembly. This is what I found 😦
2.4 GHz folded dipole assembly
Close up – 2.4 GHz folded dipole assembly – You never know what can go wrong at SOTA summit!
Let’s crack open the soldering iron and fix that bad boy.
Wow a clean break. A stress crack between the SMA center pin and the copper dipole
Earlier photo of the assembled 2.4 GHz Yagi
Balun impedance transformer – 43 mm length of RG402
For info – 2.4 GHz Bi-Quad photo taken earlier in March 2018
March 2018 – 2.4 GHz Bi-Quad photo courtesy of VK1MIC
73, Andrew VK1AD