July 21 VUS contest

During the time i was qrv i experienced very low participation from DL. Activity from OK was quite good. Some nice AP scatter QSO arranged via ON4KST chat but also random QSO. The SDR really helps to find the people when turning the antenna. Average of 270km/QSO on 70cm and 220km/QSO on 23cm are quite ok for me for operating from home.

Saturday evening 70cm. Rig HiQSDR+Iceni Transverter, 50W, 15ele.
27 QSO 7300p, ODX S59DGO, 610km.

70cm 21/07 – Kartendaten: OpenStreetMap-Mitwirkende, SRTM | Kartendarstellung: OpenTopoMap (CC-BY-SA), DL4MFM log analyzer


Sunday afternoon 23cm during the last 2h of the contest.
Rig HiQSDR+MKU13G3, 100W, 36ele.
25 QSO 5500p, ODX S50G, 560km.

23cm 21/07 – Kartendaten: OpenStreetMap-Mitwirkende, SRTM | Kartendarstellung: OpenTopoMap (CC-BY-SA), DL4MFM log analyzer

And i almost forgot: 1 QSO on 3cm with OK2A ;) Rig: FT790R2, Transverter, 10W, 40cm offset dish and W1GHZ feed.

DUR June 2021

17 QSO on 23cm and 2 on 10GHz. Quite good activity on 23cm due to ongoing Alpe-Adria Contest.

DUR 21/June 23cm result – Kartendaten: OpenStreetMap-Mitwirkende, SRTM | Kartendarstellung: OpenTopoMap (CC-BY-SA), DL4MFM log analyzer

2021 June NAC 70cm

Rig: HiQSDR, Iceni Transverter, 50W, HA8ET LNA, 15ele
Result: 13QSO, 5900p, ODX SM6VTZ 820km

I drilled some additional holes into the boom of an old 21 Tonna fragment in order to mount the mast clamp. Together with a 2nd segment this gave 15ele with some suboptimal clamp mounting close to one of the directors. But better than my 5ele lightweight i estimated. It turned out to be right.
Some of the OZ stations where easy to work. OZ1DLD/P even in SSB. Outstanding signal from SM7DTE. ODX was again SM7VTZ with a rather short AP reflection this time. But i was happy to work him with my 50W qrp signal. An average of 424km per QSO is surprisingly good.

15ele made of parts from 21ele tonna


my 70cm “transverter in a box” mess. But it does the job.

Jun21 NAC 70cm – (C) OpenStreetMap-Mitwirkende, SRTM | Kartendarstellung: OpenTopoMap (CC-BY-SA) – created with DL4MFM log analyzer

IARU June contest 2021

Because of some Covid restrictions still in place in DL there was the decission to remove the nigh time from the contest period in Germany. For me this was a very unfortunate decission since this is usually the only time where i can operate without interruptions or other assignments.
In the afternoon there was quite some RS condition. I tried to find some QSO partner on 6cm but did not succeed. I heard DB0FGB (JO50), DB0NCO (JN59) and a OK station calling. The OK station did not come back to my call and i was not lucky in the ON4KST chat.
Videos of the beacons received:

Watch this video on YouTube.

Watch this video on YouTube.


Then i switched to 10GHz. Usually i am limited to direction south because of problems moving the dish through the upper roof window. This time i managed to put the little plastic dish outside to work some station to the north. At least DF0YY made it to the log this way.

Dish for 3cm on the roof top direction north-west


Jun21 3cm – (C) OpenStreetMap-Mitwirkende, SRTM | Kartendarstellung: OpenTopoMap (CC-BY-SA) – created with DL4MFM log analyzer


Rig 3cm: FT-817, old transverter, 10W, 35cm dish with W1GHZ dualband horn
Result 3cm: 7QSO, 660p, ODX OK1FPR 200km

Later i tried 23cm. 10pm local time was already close. But i was not sure if i would be able to do some more QSO on sunday. So i decided to give some points to others outside DL at least and continued for a while. In the end i did not switch on on sunday again.

Jun21 – 23cm – (C) OpenStreetMap-Mitwirkende, SRTM | Kartendarstellung: OpenTopoMap (CC-BY-SA) – created with DL4MFM log analyzer


Rig 23cm: HiQSDR, MKU13G3, 100W, 36ele
Result 23cm: 19QSO, 4600p, ODX HA5KDQ 550km

NAC2m June 21

Short participation in 2m NAC.
Rig: HiQSDR, ME2T, 200W PA, 4ele
A nice SSB QSO with SK7CY, ODX PA0O 540km.

June 21 NAC 2m – (C) OpenStreetMap-Mitwirkende, SRTM | Kartendarstellung: OpenTopoMap (CC-BY-SA), map created with DL4MFM log analyzer

DUR 21/05

2 of 3 hours from home. Quite good on 23cm. Some nice QSO on 9cm. Unfortunately no QSO on 6cm.

21/05 DUR 23cm Kartendaten: OpenStreetMap-Mitwirkende, SRTM | Kartendarstellung: OpenTopoMap (CC-BY-SA), DL4MFM log analyzer


21/05 DUR 9cm Kartendaten: OpenStreetMap-Mitwirkende, SRTM | Kartendarstellung: OpenTopoMap (CC-BY-SA), DL4MFM log analyzer

March 21 IARU contest

Since there were still heavy covid restrictions and no chance to sleep somewhere we decided not to go to JO60OM for multi-Op. I was planning to be part time qrv from home in JO61UC. Since i completed my test-setup of the Iceni 70cm transverter i was able to operate 3 bands, 2m,70cm,23cm. More bands are not possible because the mast is too short and 13cm is not ready yet.
Despite i thought different my main operating time was saturday afternoon. I started with 70cm because i was curious for this band that i never operated from home before. It started very slow, almost nobody qrv in the beginning. During the contest some nice QSO came on top with S59P and S57M. Keep in mind that this is only 5ele and 50watts.

70cm March 21, OpenStreetMap-Mitwirkende, SRTM | Kartendarstellung: OpenTopoMap (CC-BY-SA), DL4MFM Log Analyzer


I later changed to 23cm and did some qso there. On 23cm it is a bit easier since i have 36ele and 100W. Many thanks to DL3IAS and DL3IAE for the ODX QSO via AS.

23cm March 21, OpenStreetMap-Mitwirkende, SRTM | Kartendarstellung: OpenTopoMap (CC-BY-SA), DL4MFM Log Analyzer


2m i started in the evening after the kids were sleeping. Unfortunately the conditions were very poor and i ended up with frustrating 20 QSO.

2m March 21, OpenStreetMap-Mitwirkende, SRTM | Kartendarstellung: OpenTopoMap (CC-BY-SA), DL4MFM Log Analyzer


Overall the result was a bit disappointing with the highlights of the 70/23 ODX QSO and the fact that the 70cm transverter was working fine.

DARC 10m Contest 2021

This year i spent quite some time in preparation of the 10m contest. Already a year ago i bought some fishing rods with the plan to make a Moxon antenna. This antenna was realized now. The transceiver was my HiQSDR again driving a R155 PA. In order to improve sensitvity i connected a wideband LNA from Funkamateur. The LNA was switched on and bypass by one of my sequencer PCBs. Quisk SDR forwarded 192kHz IQ samples to skimmer and from there the decodes went to the bandmap of tlf log. I started in CW and worked quite some multies. After one hour i changed to SSB which was a likely a fault because the activity in phone was low. The last 30 minutes were spent in CW again.
The map below shows the locations of the stations worked. They were taken from internet and might be incorrect. The map shows that i mainly had the moxon to north and west direction.

stations worked in 10m contest 2021 – maps by openstreetmap and opentopo contributors via DL4MFM edi analyzer


The most heavy part of the moxon is the mounting plate. The fishing rods are snapped to the plate and then fixed with U brackets. There are 16 wing nuts to fix.

10m moxon antenna under test indoor


Getting the antenna outside is not that easy. It needs to be mounted outside and there was little space because of a chimney nearby.

Moxon antenna mounted outside the roof window


It you do not take care everything will end up in a big mess.

Gordons knot – wires of the moxon


The software did cosist of Quisk, skimmer and tlf log.

SDR software just before the contest


The R155 PA can generate 100W with 5W input. Unfortunately it seems not very robust against some RF nearby. The linear power supply i tried to use before went unstable in SSB. Therefore i had to swap the supplies.

PA and power supply


HiQSDR is quite unsensitive on 10m. I used a LNA from Funkamateur which has bypass relais for TX. I had to replace the transistors because both where faulty.

HiQSDR and preamp

Marconi Memorial Contest 2020

Due to partial lockdown no multi-op activity. Other weekend activities cancelled as well, so found some time to participate the MMC from home.
The setup was my usual HiQSDR + ME2HT + 200W Transistor PA + 4 ele.
About 11h operating time resulted in 134 QSO with ODX 730km..

It was pretty obvious that almost all the big multi-op teams where missing. Still some good DX oportunities even for my tiny station.
IQ3AZ was super loud. The attempts with SM6VTZ and YO5LD failed although we heard each other for short moments.

TOP 10 DX QSOs:
——————-
9A8D JN95LM 731 km by DH5YM
9A4M JN85EI 669 km by DH5YM
IQ3AZ JN65QQ 602 km by DH5YM
S51S JN75ES 595 km by DH5YM
HA6W KN08FB 592 km by DH5YM
HG1A JN86MM 564 km by DH5YM
9A5RJ JN86EL 550 km by DH5YM
PA0O JO33HG 539 km by DH5YM
HB9FAP JN47PH 529 km by DH5YM
S59P JN86AO 528 km by DH5YM

Marconi Memorial Contest 2020 // Image created by DL4MFM log analyzer. Kartendaten: OpenStreetMap-Mitwirkende, SRTM | Kartendarstellung: OpenTopoMap (CC-BY-SA)