Current antennas

antennas_wd

Leaving the QTH this evening we had a wonderful blue sky for a change and after closing the gates and looking at the antennas I couldn’t resist to take a photo although not too good a quality as taken with an old smartphone. 😉 What you see left to right is our 6 ele OWA Yagi for 15 m on a 15 m boom about 50 m away from the station. Next are 2 x 10 ele DK7ZB 2 m Yagis with elevation mounted vertically and currently used for EME. The tower did carry a 4 x 10 ele horizontal array for moonbounce before but we had to disassemble it a while ago to save the antennas as the H frame was broken. Hope to put it back up in the near future. The big chimney (about 18 m plus antenna mast) has a 6 ele OWA Yagi for 10 m with an 11 m boom as well as a horizontal 10 ele DK7ZB 2 m Yagi on top used for TR, AU, ES & MS. Mounted sideways to the small chimney is the remote mast featuring a 4/4 duoband Yagi for 10 & 6 m as well as a 9 ele LFA Yagi for 2 m. Rightmost is the last tower carrying a 4 ele Yagi for 20 m (just a 10 m boom) and a 5 ele Yagi for 6 m. The big chimney also holds the 80, 40 & 30 m dipoles (all Inverted-V) as well as the apex of our 160 m full-size lazy loop.

Plans are to mount a new/better 6 m Yagi above the 15 m beam and something dualband for 17/12 m above the 20 m beam. Also need to install some better lowband antennas, especially for receive (maybe just temporary solutions during the winter). So as you can see still plenty of work left for the future. 😉

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Holiday activities … getting things done

Img_5734It’s been a while since my last blog entry. Reason is simple: I am on holiday 700 km away from home in JO73, about a hundred kilometers north-east of Berlin, where we have our contest station. Have been busy doing several station upgrade projects with focus on remote usage capabilities. Weather permitting (we had some ugly rainy days overhere) I upgraded the VHF remote antenna mast last week. I added 2 platforms to the mast to take away load from the rotator so mounted it on the lower platform now with a thrust bearing on the upper platform instead of just the rotator on the mast top. Installed a new 2 m antenna, too, and extended the mast another meter. Yes, not that much but hey, every meter counts! 😉 Many thanks to Heiko, DG1BHA, who assisted whenever I needed a helping hand!

Img_5722Last weekend saw me putting together the new all Elecraft remote station consisting of a K3/K144XV + KPA500 + KAT500 together with the homebrew 10×2 antenna controller to access all of our antennas remotely, too. The control side has the Elecraft “front panel” K3/0 mini. Remote & control side are connected through Microbit’s RRC’s (Remote Rig Controllers). Also put a dedicated bandpass filter set inbetween to minimize station interference when somebody else is QRV locally. So we are now able to run remote and locally in parallel choosing all available antennas fully automatically, same as we do when two of us are local for the bigger contests. Have been using the station quasi-remotely during the last few days having the front panel in the same room to make sure everything’s working properly before being 700 km away again next week. 😉

Also put together some additional ERC-M rotator interfaces by Rene, DF9GR, as well as relay cards and installed everything in the HF rotators. They work very reliably, have been using them for a few years already and no problems at all, highly recommended! I now also use the LAN option with the Lantronix modules, they work like a charm, too. All four rotators are turning remotely now although the one with the 15 m beam gave some trouble. It’s a quite old KR-2000 which got a relay card but was not turning through the controller. Turned out the pre-owner modified it and put the brake fuse into the common line instead of the brake line as the schematics said. Thus not only the break current but also the motor current flowing through the fuse so it blew after a few seconds. After that was corrected it is now turning fine, too. 😉

Last not least installed 2 additional IP (web-based) power switches to switch rotators and interfaces in the different rooms on & off remotely as well as enabling the local operators to do so, too, without needing to open a webpage first. 😉 The new NETIO-230C models are well suited for the task as they have dedicated power buttons for local switching. The old NETIO-230A which I was using until now had a more complicated method that was not easy enough for every local OP. 😉

All in all quite a bit of stuff done so did not spent too much time on the radio itself. Nevertheless managed to work 9K2MU on 6 m for DXCC #129 as well as a few new grid squares. Sorrily I missed the 2 m Sporadic E opening on May 23, just arrived about an hour too late from the 700 km trip up here. A pity, as the band has not opened again the last days. But maybe I will be lucky during the remaining few days of holidays, still keeping fingers crossed. 😉

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DM5ØPCK in WPX-CW

cqAnother WPX-CW is gone. Used the special call DM5ØPCK of our local radio club to provide a unique prefix.

As I had to attend a funeral Saturday afternoon I missed most of the best run time the first day. Defined this one as a non-serious entry due to the circumstances but nevertheless tried to make the best out of it. Suffered from heavy sleep deprivation at times. Well, no excuse, I did not practice any CW up front like I wanted to so still not good enough. 😉

Conditions were rather mixed. 160, 80 & 40 m suffered quite a lot from static crashes (a few thunderstorms around Europe, typical summer QRN) making copy difficult and many repeats needed. 20 & 15 m saw some nice US openings and 10 m at least provided a few Sporadic E-QSOs within Europe although spending much time there might not have been the best strategy points-wise. But tell that to an old 10 m addict. 🙂 Worked half a dozen US stations on 10 m skewed path beaming SA with very weak signals. Makes exchanging serial numbers a real challenge but the more proud you are when completed. 😉

Detailed analysis is available here: SH5 DM5ØPCK WPX-CW

15 m sure was the money band this time providing a solid stream of 3 pointers. Although skimmers confirmed I was putting out a reasonably strong signal in the target areas I generally found the rates much too low. Best hour was just 92. Lots of CQs in-between …

                   CQWW WPX Contest, CW

Call: DM50PCK
Operator: DH8BQA

Class: SO(A)AB HP
QTH: JO73ce
Operating Time (hrs): 33

Summary:
 Band  QSOs         Pts/QSO
---------------------------
  160:   22           1.9
   80:  138           2.0
   40:  425           2.7
   20:  550           2.0
   15:  605           2.4
   10:  305           1.5    Average 2.2 overall
---------------------------
Total: 2045  Prefixes = 874  Total Score = 3,895,418

Club: Bavarian Contest Club

Now looking forward to July’s VHF contest (first full weekend) and IARU-HF. Not sure about the latter one, it’s my turn but I might give this one to DL3BQA this year (we share the station and change RDXC & IARU-HF between OPs each year).

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Kenwood CAT banddecoder

kwd-bd-schJust got around to write a few lines concerning our Kenwood CAT banddecoder. It was published in FUNKAMATEUR issue FA 10/13 and all project parts like PCB layout, firmware, etc. are available for free for private use (sorrily no complete kits available this time but depending on numbers I could provide a few PCBs and programmed PICs if needed). Doing so I realized how difficult and especially time consuming it is to translate a well made German technical article into English and adopt it for web publishing. So the German article contains a lot more details and background information on the design, why things were realized as they are, a.s.o. I hope the English description is still comprehensive enough and useful. Would appreciate some feedback, no matter if positive or negative, I’m open for all. 😉

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ZD7 – St. Helena Island #128 on 6 m

zd7vcWhat a nice evening! Did not do many QSOs on 6 m this season yet although there were already a few openings. Either skip was not right from “blackhole” JO73 or I was not at the station. Tonight has been a different matter. Got a phone alert from Sandro, DD3SP, reporting he had just worked ZD7VC on 6 m. Station was on but I was doing other things around so went over to the desk and sure enough he was audible, although just above the noise (he was 55-57 about 100 km more south … location, location, location ;)). Tried calling but everybody else had a better skip. Bruce once came back with DH8 and another time with BQA but no complete QSO. He soon vanished into the noise so I already thought that was it. Kept the frequency on while doing other things again when he suddenly returned about 10 minutes later. Not louder than 52 on the meter but after 2 calls (and nobody else calling, the pile-up started again just after my QSO – lucky!) we had a complete QSO. 🙂 About 2 minutes later he was gone again and never heard back. So you really have to be there at the right time, no mercy! It’s been a while since I last worked a new one on 6 m so quite happy. 😉

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Melting more solder … 10×2 Antenna Controller

10x2remote1 10x2remote2

Last year I published a few articles on station automation in FUNKAMATEUR magazine. One of them (FA 5/13) was about a 6×2 antenna controller unit I had developed that allows using a 6×2 antenna switch from two different shacks in parallel and keeping care of interlocking things. Soon after we changed our homebrew 6×2 switch for a commercial 10×2 antenna switch (sorrily no 10×2 homebrew designs available) so I re-developed the 6×2 controller to a 10×2 controller. As I now want to use all the available HF antennas remotely, too, I just put together another dedicated 10×2 controller for the remote station, see pictures. As an addition to my original design (that is used at our contest QTH in the 2 shacks for “normal” operation) I included another small circuitry to this one to also switch the PTT of the remote K3 between HF and VHF so the 2 m-PA will not be keyed when working on HF and vice versa. Furthermore I put the push buttons for antenna selection to the backside as I just need them once (or just whenever something changes) to select the appropriate antenna (selection is stored in PIC’s internal memory) and to make sure it’s not easy for somebody in front of the station to accidentally change it. You know it is difficult to correct such “errors” when being a few hundred kilometers away. 😉 Hope to find some time in the next few weeks to put all this stuff (schematics, PCB design, detailed description, etc.) onto this website, too.

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All Elecraft remote station coming …

I have been a user of the Elecraft K3 for about 5 years now and really like the radio, UI, performance, etc. Never had a radio for such a long time (except my little “Swiss knife”, the Yaesu FT-817), usually swapped every 2-3 years to try out something new. Obviously Elecraft did something right. 😉 For my remote station I had been using an ICOM IC-706MkIIG and later an IC-7100 (as well as an Elecraft KPA500 amplifier) with their front panels separated through the internet using the Microbit Remoterig boxes (first user in DL). I could never imagine to run a radio without a front panel in front of me (been there done that) so I accepted the performance drawbacks when doing remote just for “the feel of it”. So it was good to see Elecraft announcing the K3/0 “remote head” to use a K3 in the same way like the Icoms thru Remoterig. But the big form factor of the K3/0 (it’s just an empty K3 thus the same size) was never appealing to me, it is simply too big for my small desk here at home.

k3-0-miniLuckily Elecraft thought it over and developed the K3/0 mini which is just the front plate in a small enclosure. So I finally bit the bullet and bought a second dedicated K3 for my remote setup plus a K3/0 mini. Yes, it is quite an investment but this way I will have a very good setup that is even usable for contests remotely (which the Icoms sure were not!). I will also rebuild the remote antennas for VHF and make access to all the other antennas and rotators for HF we have overthere at our contest QTH, so will be QRV on all bands rather than just 10 – 2 m as it is the case right now. Quite some work waiting, will try to realize everything during my 2 weeks holidays in 2 weeks when I will be back in JO73 for (hopefully) some VHF Sporadic E, too. 😉

Built up the whole system here in Cologne yesterday to try it out and configure everything and also made all the needed cables. It’s been a while since I last heated up the soldering iron (yes, too much work and other priorities) but boy, it’s been good to smell some solder smoke again. 😉

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Automatic 4 x 1 antenna switcher page added

bx-162Having had a few minutes time tonight I decided to add another project page to this website: BX-162 automatic 4×1 antenna switch controller. I developed it a few years ago to automatically control a 4 x 1 antenna switch that I had built from a kit. It was published in FUNKAMATEUR magazine back in 2010 and is still available as a kit from FUNKAMATEUR’s webshop. Might be useful for somebody. 😉

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IARU-HF 2012 certificate received

IARU-HF-2012Received the contest certificate for IARU-HF 2012 from our local club’s QSL manager. IARU contest certificates are usually sent along the national QSL bureaus. Maybe that’s the reason why it took so long or maybe ARRL, who is managing the contest, was simply busy creating all the certificates for recent contests. Heard they have some trouble, too, i.e. currently no contest manager available and all work is done by temporary guys right now. Keeping fingers crossed they will resolve the problems.

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HA1YA transverter & DFØFA 2 m contest results May ’14

Condx were poor, lots of long and slow QSB, i.e. stations calling with s3 signals and vanishing into the noise, returning only 1-2 minutes later. Made it hard to work real DX, a lot of the usual suspects missing this time. Besides the activity was rather poor. We have the impression it is less and less people QRV from one VHF contest to another. What is your perception? Let me know by mail … Anyway, here are our results:

df0fa-ergebnis

On the positive side: I received my ordered ME2HT-PRO+ transverter by HA1YA just in time for the contest, i.e. on Friday. 😉 So we could give it a good test drive with my Elecraft K3 as an exciter and I have to say, I like the combination. Although we do not have too much QRM in Germany’s north-east on VHF I opted for the VARI-L DBM-188 +30dBm mixer to be on the save side. Selectivity and sensitivity are excellent, all in all great workmanship so I can whole-heartly recommend it.

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DFØFA from JO73CF on 144 MHz this weekend

It’s time for a another major VHF contest again. 🙂 So we will be active again with FUNKAMATEUR’s clubcall DFØFA from JO73CF as usual on 2m this weekend. Team will consist of the usual suspects, i.e. Knut – DGØZB, Heiko – DG1BHA, Olli – DH8BQA, Uwe – DL3BQA, Paul – DL5CW & Andy – DL9USA. Looking forward to work many of you!

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ARRL-DX-CW 2013 contest certificate

ARRL-DX-CW-2013Was wondering why I found this strange looking contest certificate for my participation in ARRL’s DX-CW contest last year in the mailbox. I ended up #2 in Germany SOSB15 and usually only #1 is awarded. Just checked the rules again and saw they send out awards to all DX participants that do more than 500 QSOs during the contest so that’s certainly why.

Would have been nice to print the placement onto it, too, even if not being #1. 😉

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WPX-SSB raw scores published!

cqThe WPX-SSB raw scores (i.e. before log checking) where published today. Seems my NT3S entry @N2MM will not only win the SOSB10(A) category for USA but is also good enough for a new NA record. 🙂 Of course I will loose some points due to the log checking process (nobody’s perfect) but the difference to the guys behind me should be big enough to stay #1 in W2, USA & NA. 😉

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Strange 10 m opening

During Sunday in CQMM we experienced a very strange but welcome 10 m opening to North America. The band was quite bad during the last few days. Southern lines like Europe to South America worked (although I’ve seen better condx into that direction, too) but no North America at all. Even on 20 m signals were so weak I struggled to work this week’s W1AW portable centennial stations. It got a little better on Sunday, could at least work a few of the bigger US stations on skewed path, i.e. beaming to South America. At the same time we had a nice longpath opening to Japan on 10 m. Around 16z all of a sudden there were very strong signals from North America so I could add a bunch to the CQMM log. It was like somebody switched propagation on. What made it really strange was that I had to constantly change antenna direction for max. signal strength. Some W7’s were strongest beaming West (Caribbean), the mid-west was best beaming direct path and some W6’s (normally 325° from here) were strongest beaming 360° straight over the Northpole. Signals peaked 599+20 and I could even work a number of US QRP stations, some of them with real S9 signals. What made it especially interesting is that we could hear the SK4MPI beacon on 2 m via Aurora at the same time! I do not remember which US station it was but at least one was audible via Aurora on 10 m, too. He had a clear tone when beaming 300° and got the raspy Aurora scatter sound when beaming North! So both openings must have been connected in some way. Seems the old saying stays true: There aint no meters like ten meters! 😉

The opening was good to work W1AW/5 in MS & W1AW/0 in ND on a few more slots, too. Thinking back how difficult it was on the lower bands on Saturday and how easy now on 10 & 12 m made this opening even more appreciable. Sorrily today condx are back to what they were during the last few days: very bad. 🙁

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CQMM – The CQ Manchester Mineira DX Contest

CWMM DX ContestWhile waiting today for Heiko, DG1BHA, to arrive for the 15 m rotator care I made a few more QSOs in CQMM. Seems to be an interesting contest although activity was not too high. Did 50 QSOs yesterday, 100 while waiting for Heiko and finally another 100 after the 15 m rotator was fixed and before leaving the station to go back into town. We had a surprise opening on 10 m late afternoon with very strange path’ and amazing signal strength’ but more on that in a separate blog entry, maybe tomorrow when back in Cologne.

                   CQ Manchester Mineira DX Contest

Call: DH8BQA

Class: SOSB/10 HP
QTH: JO73ce
Operating Time (hrs): 8

Summary:
 Band  QSOs  Prefixes
----------------------
   20:  (1)     (1)
   10:  263      47
----------------------
Total:  252      47  Countries = 51  Total Score = 107,118

Comments:
Elecraft K3, PA + 6 ele OWA Yagi

Couldn’t resist to do one QSO on 20 m to give Carol, N2MM, who hosted me during WPX-SSB, some points. 😉

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KH8 American Samoa wkd as an ATNO

Was lucky enough to catch KH8/DL2AWG on 20 m SSB today. They were just above the noise and big QRM but have been lucky enough to do a good QSO. If you wonder what ATNO stands for: all time new one – a DXCC never worked before. That’s been #290. 🙂

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Holyland DX contest & Happy Easter!

Happy Easter to everybody! Well, it’s not that happy overhere. My aunt passed away on Wednesday. So I drove 900 km to visit my grandma (87) and tell her the bad news. 🙁 Then took her with me to my mom’s place and she will stay with us over the Easter weekend. It’s her second child she lost now within short time (my father passed away just one and a half years ago) and I had fear she would not stand it (she had severe health problems after my dad died). So we will take special care of her. It’s always bad if parents outlive their children. 🙁

On radio matters we met at the contest QTH today. Made a few QSOs in the Holyland DX contest (see below) and another few in CQMM that is lasting until tomorrow. Had some nice discussions, cake & coffee and will meet again tomorrow to take care of the aberration of the 15 m rotator. Condx are quite bad, was really tough to get W1AW/5 and /0 into the log today (yes, I’m trying to work them from every state). Keeping fingers crossed they will get better again during the next days.

                    Holyland DX Contest

Call: DH8BQA

Class: SO Mixed HP
QTH: JO73ce
Operating Time (hrs): 1:20

Summary:
 Band  CW Qs  Ph Qs  Dig Qs  Mults
-----------------------------------
   20:           2              2
   15:    6      6             12
   10:    7     15             18
-----------------------------------
Total:   13     23      0      32  Total Score = 1,152 
Posted in Contesting, General stuff | Comments Off on Holyland DX contest & Happy Easter!

JIDX-CW & (bad) 10 m condx

jidx2011ssbThought it might be a good idea to participate in this weekend’s JIDX-CW contest. I participated in the SSB leg in 2011 and had quite some fun. They make some nice contest certificates, too, see left. But condx are awful right now so no fun at all. 10 m was pretty much dead the whole Saturday, nothing heard at all during the morning and only a few weak South American stations in the afternoon. Sunday morning was a bit better, at least I could hear & work a dozen JA’s although most signals were just above the noise and despite 600 W and a 4 ele Yagi the JA’s were struggling to hear me – ouch! 🙁 Only worked 3’s, 4’s & 6’s call areas. Heard a very weak JA1BPA but he was not able to dig me out. Later on the Russians working the Gagarin Cup got stronger but I was only looking for JA’s. Now in the afternoon the band is dead again, only signal audible is FR4NT on SSB, nothing else. Well, this is how it will feel daily in no more than a year, I suppose. Maybe we will be lucky to see 10 m condx return this autumn again before the final decline. I have my doubts but let’s try not to loose optimism. 😉

                    JIDX CW Contest

Call: DH8BQA

Class: SOSB/10 HP
QTH: JO73ce
Operating Time (hrs): 2

Summary:
 Band  QSOs  Mults
-------------------
   10:  13     9
-------------------
Total:  13     9  Total Score = 234

Comments:
IC-7100, KPA500 + 4 ele Yagi
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RUSDX 2012 certificates received

Russian-DX-2012-10m Russian-DX-2012-80m

Today I had a letter from the famous Box 88 Moscow in the mailbox containing my 2 certificates for winning RUSDX 2012 on 80 & 10 m in Germany. As already mentioned you can do 2 single band entries in the Russian DX contest in parallel. 😉 As I heard the certificates for 2013 were received by others today, too, so it seems they mailed out for 2 years at once.

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SP-DX contest 2014

SPDX-DH8BQA-2007Was playing around a bit in SP-DX-C during the weekend. Due to my location right at the German-Polish border there is no skip into Poland on the higher bands so all contacts were entirely made via Backscatter. Most signals were weak and I’m sure my signal was too, but Polish operators usually have good ears so worked almost all I heard. 😉

It’s a pity there’s only either CW or SSB in the single band categories nowadays. Mixed mode would have provided much more fun, i.e. more QSOs. Not shure why that was abolished as the category existed a few years ago. Although being SOSB 10m CW I handed out a few QSOs on SSB, too. Will see what the result is good for, PZK issues some nice contest awards, see left. 😉

 

                   SP DX Contest

Call: DH8BQA

Class: SOSB/10CW HP
QTH: JO73ce
Operating Time (hrs): 6:30

Summary:
 Band  CW Qs  Ph Qs  Mults
---------------------------
   10:   70    (6)     16
---------------------------
Total:   70    (6)     16  Total Score = 3,360

Comments:
Icom IC-7100 + KPA500 + 4 ele Yagi
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