Delta Loop for the 20m band

A delta loop antenna is not particularly suitable for SOTA. It requires much more space than a vertical and the set-up is more complicated.
Nevertheless I’d like to show this design here because sometimes space (and weight) don’t matter and a low take off angle is welcome. One possible scenario could be the VK/ZL/JA <> EU S2S event.

loop1
Delta Loop on HB0/Li-004, Augstenberg, 2359m a.s.l. during our DX-pedition to the Principality of Liechtenstein in September 2013. DL4AAE worked many JA’s on 20m with 100 Watts output power.  Note: the horizontal wire has been attached to the pole in order to avoid sagging.

Weiterlesen

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KX3 Go Box

Having played with the KX3 for a couple of weeks I wanted to try it outdoor. But Hiking comprises some risk for the rig: rain and snow, shock and vibration and scratches from other things in the rucksack. The first attempt with bubble wrap worked but was not to my full satisfaction. A box was needed!

I searched the web for availalbe solutions (which are quite a few) and found Tom’s great Go Box:  http://www.oe2atn.at/tom/gobox/ – the most professional one I found.

However, I had something different in mind: The box should look understated in order not to attract thieves on a long hike or a stay on a camping site. By accident I tripped over an empty first aid box. Slightly too big for the KX3 but apart from that very nice.

[edit]: From time to time while turning the dial, I noticed that VFO A seems to get stuck at a certain position. The frequency reading in the display „jumps“ back several 10 Hertz then moves on again and „jumps“ back. This can happen several times. Suddenly the failure disappears and the VFO works as intended.

When searching the web I found the following video from KC9W which describes exactly my situation: https://www.youtube.com/watch?v=COPj2skxWys

Checking the encoder inside my KX3 showed that it is already the new version.
(Link to ELECRAFT’s KX3 VFO Encoder FAQ)

An explanation for this behaviour could be excessive mechanical stress to the encoder. When inspecting the Go Box after opening, I found the foam in the lid slightly depressed at the position where the VFO A knob is located. It is possible that under such pressure the foam is no longer able to absorb external shock. Instead, pressure applied to the lid will be transferred directly to the encoder.
As a first measure I removed the foam from the lid (as can be seen in the picture below). In order to keep the KX3 in his position, I put a large piece of foam on top of it. If this temporary solutions works, I’ll have to think about something more professional…

go-box