Tag Archives: Kaltes Feld DM/BW-659

Antennas, Field Reports, Guest Posts, Homebrew, How To, Portable, POTA, QRP, SOTA

Experimenting My Way to the POTA Kilo Award

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by Thomas (DM1TBE)

Some time before Easter I noticed that I am close to 1000 QSOs at my favourite place at the “Kalte Feld”, a POTA and SOTA activation zone and would soon qualify for the POTA Kilo Award. I like the Kalte Feld for the quiet, spacious area with a hut that is vending traditional basic food and beverages – which in Germany usually means good beer and different sausage types (and other stuff – to be fair). I already wrote some articles about the history of the area and my activations.

The conditions at the activation zone are quite good. I have made 2 activations there with more than 100 QSOs (and many smaller), so I thought it should not be too difficult to complete the required QSOs in one day.

DAY 1

The weather for the Easter weekend was expected to be one of the first warm and sunny days this year. So, on Easter Sunday, I headed to the area to get the last missing 49 QSOs for my POTA Kilo Award. Easter hiking has a centuries long history in Germany. This and the nice weather made the area quite crowded. The close airfield for gliders was busy and the whole time while operating there they were in the air above.

The barbecue places and outdoor seating around the mountain hut were busy but happily the bench some meters away that I am normally using, was still available.

I wanted to start with an end-fed half-wave antenna for the 20m band, tied to a 10 meter (33 ft) fiberglass mast. This is a very easy and quick to deploy antenna and I like it, especially if there is not too much space for antennas with a larger footprint. Since it’s a straight vertical, it also has a higher chance for DX contacts – when the conditions allow that. The antenna is Open Hardware and you can find further details on GitHub.

The mast was tied to the bench and the antenna was raised. Besides the comfort, the possibility to tie a mast to it is the second reason why I am always looking for benches.

The conditions were far from being perfect, and it took me 40 minutes to get 18 CW QSOs on the 20-meter band. Switching to SSB wasn’t a big help either, and I soon gave up with only 3 additional SSB QSOs in the log.

I had brought another antenna with me that I wanted to try. The 10 meter (33 Ft) fiberglass mast also has the perfect height for a ¼ wave vertical on the 40-meter band. So I cut 5 wires to a length of about 10 meters (33 ft) and connected 4 of them together at one end with a cable lug and attached another cable lug to the vertical element.

I then used the basis of the JPC-7 antenna for the coax plug and for connecting the vertical element and the radials. There are a lot of articles and videos about ¼ wave vertical antennas. But the information is usually about either elevated and resonant radials or random length ground radials. I wanted to have resonant radials, but I could not be bothered with carrying all the stuff nearly 2 miles to a summit for elevating 4 x 10m (33 ft) wires, so I simply left them on the ground.

My idea was to try a full size vertical for the 40 meters band with resonant radials that still is portable and fits to my existing equipment.

The SWR was quite nice being close to 1.0 : 1 at the CW portion of the band, so I started operating.

The conditions were similarly difficult as on the 20-meter band. It took me 25 minutes for another 18 QSOs.

As it became increasingly cloudy, I checked on my mobile and saw that rain was approaching fast. Since I had roughly 2km or 1.5 miles descent ahead of me, I stopped abruptly with just 10 QSOs short of the POTA Kilo Award.

A bit disappointed, I called it a day.

DAY 2

I could not leave the missing 10 QSOs for long. The very next day, Easter Monday, was a public holiday in Germany. And as the weather started nice, I again made my way to the activation zone. Continue reading Experimenting My Way to the POTA Kilo Award →

Antennas, Field Reports, Guest Posts, Portable, POTA, QRP, SOTA

Quick test of my new SOTAbeams Band Hopper III antenna at a POTA/SOTA location

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by Thomas (DM1TBE)

Since I have seen the Band Hopper III antenna at the website of SOTAbeams, I have been thinking about it. Most of the time I have used end-fed half-wave (EFHW) antennas when operating portable – vertical attached to a fiberglass mast or in a sloper configuration with a tree.  Those EFHW antennas seemed to cause way less troubles than a dipole with its centerpiece and coax at the thin end of the fiberglass mast.  However, there was this “other” dipole from SOTAbeams. So I thought I could give it a try and ordered it.

Two days later -including customs procedure- the antenna arrived. The antenna is a linked dipole for the 20-, 30- and 40-meter band and weights less than 500 g / 18 oz. That includes the coax and guying material. I already had the Tactical Mini ultra, a 6 m / 19.6 ft fiberglass mast that is a perfect fit for the Band Hopper antenna.

The weather was fine, my manager at work was on vacation, so there was no reason for not leaving the home office early and go for a quick activation. I went to the SOTA location for Kaltes Feld (DM/BW-659), which is also POTA (DA-0410). I have been there a couple of times this year, but offering chaser points for both programs promised more QSOs, especially when conditions are difficult. The other advantage of this place is that you can drink cold beer if the antenna fails to work. 😉

You may, or more likely may not, remember this image from an activation report in March this year.

The place looks much more inviting now with kids playing, people enjoying barbecue and a cold beer, and operating a radio is much more pleasant.

Although I have been here a couple of times, I have never visited the ruins of Castle Granegg, just a mile away. While the SOTA activation zone is surrounded by trees, the walk to the castle satisfies with a nice viewpoint on the way. Continue reading Quick test of my new SOTAbeams Band Hopper III antenna at a POTA/SOTA location →

Articles, Field Reports, Guest Posts, Portable, POTA, QRP

Guest Field Report: Germany has a new POTA activator!

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My conciliation with Parks on the Air

by Thomas (DM1TBE)

Intro

POTA and I had a very one-side relationship so far.

Roughly a year ago I tried to activate a park, but although I spotted myself, I had not been able to make a single QSO. In April last year, I tried it again, with the same result. Luckily, I was on a SOTA summit and spotting me on SOTA brought me enough QSOs to make it a successful activation for both, POTA and SOTA. So I decided to disregard POTA and my only POTA activity was watching Thomas (K4SWL) nice videos on YouTube.

My bad experience with POTA was probably due to two factors:

  1. I only had an intermediate license previously, which limited me on HF to the 10, 15 and 80 meter bands and
  2. POTA was no as popular in Europe and Germany in particular as it was and is in the US. While SOTA and the Flora & Fauna program already had a very active community in Europe for years, POTA had a hen and egg problem.

However, with the increasing popularity of portable operations, POTA has also gained some traction in Europe. I have the feeling that every time I take a look at the spots on the POTA website, I see more European stations.

Things here in Germany have changed for the better, too. POTA got a German website (parksontheair.de) and a community called “Draussenfunker.de” (“Outdoor ham”) with website + Discord that became very active with those pursuing outdoor activities in general and POTA in particular. Lately, local POTA coordinators have been named, who started to add new parks to the program.


Photo by Carsten Steger CC BY-SA

I thought suggesting a recreation area close to my home would be a good idea. A few days later I had the brand new POTA park DA-0410 30 minutes away. The park has a size of 6.3 km² / 1,567 acres and a peak elevation of 780 m / 2559 ft, which is also the SOTA summit Kaltes Feld (DM/BW-659).

My plan was to operate from the clearing on the top plateau, where there is also a mountain hut with restaurant. The 2 km / 1.25 mi trail was not very difficult with an incline of just 105 m / 344ft as the parking area is already at an elevated level.

Although the park extends to the proximity of the parking area at the Hornberg gliding airfield, I wanted to be in the SOTA activation zone due to my bad experiences with POTA activations. The gliding site was founded nearly 100 years ago.  After the First World War, the Allies largely banned motor flight sports in Germany, so gliding airfields, such as this one, popped up across Germany. Continue reading Guest Field Report: Germany has a new POTA activator! →