I/AA-184 – Weißhorn/ Corno Bianco– 2317m


May 31, 2018; 9:30 – 9:55 UTC

6 CW QSOs on 20m, 2 CW QSOs on 30m, 8 CW QSOs on 40m
Good condx with some QSB, confusion on 40m

Rig: MTR3B / 3W, 1250mAh LiPo, Palm Pico Paddle
Ant: EFHW Dipole as inverted L on 6m GRP Pole

Wx: Overcast (fog on top), approx. 5°C
Walking time approx. 60 min. up, 30 min. down. Easy and well prepared track. Only the last metres are secured with a fixed rope.

How to get there?
From Cavalese to Lavezèjoch and further to Jochgrimm (Passo Oclini, 1989m asl) by car. From there in approx. one hour to the summit.



DL/AL-077 – Grosser Daumen – 2280m


May 25, 2018; 10:45 – 11:10 UTC

My 2nd activation of DL/AL-077
1 CW QSO on 20m, 3 CW QSOs on 40m
Condx ok but only four random QSOs because RBNhole didn’t spot me on SOTAwatch.

Rig: MTR3B / 3W, 1250mAh LiPo, Palm Pico Paddle
Ant: EFHW Dipole as inverted L on 6m GRP Pole

Wx: Sunny (first, later overcast), approx. 5°C
Walking time approx. 3 hrs. up, 3 hrs. down (via „Kleiner Daumen“). Tough conditions due to deep snow.

How to get there?
From Hinterstein (car park) to Giebelhaus by Bus. From there in approx. 1 hour to Schwarzenberghuette (1380m asl).
Follow the signposts to Engeratsgundsee, Laufbichlsee and Großer Daumen (approx. 3 hrs.)


Transatlantic S2S Party from DM/BW-099 – Achalm – 707m


April 21, 2018: 16:45 – 18:15 UTC

Rig: KX3 / 10W, Panasonic 7.2 Ah AGM- battery, Palm Pico Paddle
Ant: End Fed Half Wave Dipole (with quarter wave matching stub) on 10m GRP pole

11 CW QSOs on 20m – 4 S2S

DX worked: VE1WT, W4KRN
DX S2S worked: VE2DDZ, KQ2RP, N0MAP (hrd only)


KX3 encoder issue

While operating on DM/BW-852 I encountered an issue with the Keyer/Mic- encoder of my KX3. For about a minute it wasn’t possible to change the keyer speed. Luckily the speed was set to a reasonable value (20 wpm). Then, maybe by touching the knob differently, it worked again.
A couple days ago, when preparing the activation, I had the same issue while trying to reduce the KX3’s output power. I pushed the button (the display showed 10 W) and turned the knob. The reading went down to 9.8 and stayed there regardless of any further turning. I switched to „keyer speed“ by pushing the knob (which actually worked) and tried to change the keyer speed to no avail. Then I switched back to output power and turned the knob again: the encoder did not work. Even after switching the KX3 off an on, it remained in this state.

Next I opened the KX3, took out the CP- board and did some resistance measurements at the back side of [Z4]. Now the encoder seemed to be working again. After assembling the KX3 everything worked smoothly.

It looks like the encoder has an issue. But before I replace it (or even all four of them) I asked the experts at ELECRAFT for a confirmation. The reply arrived within a few hors (!)

„Hi Roman,
Thanks for the contact.  To your questions on the KX3 encoders, we have received reports of some encoders losing some of the damping fluid that is embedded into the shaft and sleeve.  These are sealed but can leak.  When this happens, some of the fluid will get into the optical encoders and cause the symptoms you are seeing.
Generally, we recommend all 4 be replaced at the same time to save having to do them individually.  We do this with the K3 and K3S encoders in much the same way.
The KX3 encoder is Elecraft part #E640018 at $2.08 each.“

The encoders are already ordered and will be replaced as time permits. Thanks ELECRAFT for the fast support!

DM/BW-852 – Herrenwald – 910m


April 2, 2018  12:00 – 13:30 UTC
Sunny, approx. 10°C, few clouds
Walking time 20 min. up, 15 min. down

Rig: KX3 / 10W, 2200mAh LiPo, Palm Pico Paddle
Ant: End Fed Half Wave Dipole with Traps (40m – 30m – 20m) on a 8m wooden tower

4 CW QSOs on 20m, 3 CW QSOs on 30m, 40 CW QSOs on 40m, 5 CW QSOs on 60m


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.

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.


EFHW- Dipole with Traps

While searching for an alternative to my Linked- Dipole I tripped over the posting of Pedro, CT1DBS, illustrating an end-fed half-wave (EFHW)- Dipole with Traps. Here is the Link to his article. With this design changing bands can be done in no time thaks to the traps. Lowering or modifying the antenna is no longer necessary.