Testing the new Kuhne MKU 23 G4 on 13 cm

November 22nd, 2016

Today I configured the MKU 23 G4, I ordered from Michael in Friedrichshafen to perform a RX test. Via aircraft scatter it was no problem to receive the beacons OZ7IGY in JO55WM over 670 km and OK0EK in JN89VJ over 689 km. The sun noise is at a level of 6 dB.

ra-maps-jn49cv89kf-2016-11-26-07-21Beacons regulary receivable on 13 cm (green: TR / blue: AS)

The motivation is high now to configure the TX line as well 😉

November IAC/NAC/UKAC on 23 cm

November 17th, 2016

I have been very short in time for this activity evening, but managed to work 10 Stations within one hour. The first three were the three Johns from UK: G4BAO, G3XDY and G4ZTR.

dj5ar-iac-nac-ukac-2016-11-15The activity was very moderate this time.

IARU Region 1 UHF/SHF Contest ist over

October 2nd, 2016

Despite a late start and easy going operation, at least 63 QSOs filled the log for the 23 cm band. HA5KDQ from Budapest (JN97LN) became my new contest-ODX with 829 km. As can be seen in the map, the eastern directions are my favourite ones.

ra-maps-jn49cv89kf-2016-10-02Thank you to all paricipants and those who had patience to complete some QSOs!

Strange Tropo today

September 28th, 2016

During the morning I was able to monitor GB3FM in IO91OF on 1297.050 MHz and G8MBU in IO90IR on 1296.800 MHz. Now in the afternoon F5ZCS in IN87PT on 1296.959 MHz came out of the noise with a strong signal of 549 with fast QSB. It is my 53rd beacon on 23 cm. The weather here in Mainz doesn´t look like tropo: 8/8 cloudy and wind at 40 km/h.

2016-09-28-13-00-f5zcs

Listen to F5ZCS:

2016-09-28-f5zcs

July-Results of Italian Activity Contest published

September 8th, 2016

It´s nice to see me as #2 in IAC. To meet the lads from Italy on 23 cm every 3rd Tuesday in month is always big fun. Unfortunately I missed the August event due to my dismantled rotor. Instead I met Giorgio, IK3GHY, at the EME Conference in Venice. Also big fun to see his new amplifier for 23 cm there, wow!

2016-09-08-21_40_02-2016_iac_annuale_1k3-4-pdf-adobe-acrobat-reader-dcEverything is up and running again. Jacek of Spid in Poland gratefully did a great job in fixing my rotor. So I expect to be present in the September-IAC.

Dismantling the Rotor

August 2nd, 2016

After having serious issues with the elevation drive, I dismantled the BIG RAS Rotor last weekend. A construction to support the dish by keeping it in an upright position has been installed.

DSC_1124aAfter opening the case of the rotor, the failure could easily been seen: The cogwheel does not fit into the worm gear. Instead it slips over it. I hope to find a solution soon.

DSC_1134a

Update 2016-08-03: SPID offered to check and repair it as a warranty case! So it is on the way to Poland now. TNX to Jacek of SPID Elektronik!

VHF/UHF/SHF Contest May 2016 – Record breaking!

May 8th, 2016

And another Contest is over. Again I learned a lot and I am happy with the results: With a count of 82 QSOs I broke my personal record in claimed QSOs in a 23 cm contest. Since October1990 the number has been as high as 78 QSOs.

RA-Maps JN49CV89KF 2016-05-08 14-32The claimed score is a little more than 30.000 points and a new personal record as well. The 82 Stations, worked on 1296 MHz, are from 12 DXCC countries and located in 41 different grid squares. Countries worked were 40 x DL, 1 x F, 3 x G, 2 x HB9, 1 x HA, 5 x I, 6 x OE, 14 x OK, 1 x OM, 1 x ON, 5 x PA and 3 x S5.  In most of the QSOs aircraft scatter was an important factor. 35 contacts were done in CW. ODX, as usual, was HG7F over 817 km, still my ODX via AS. Nice was to work 3 OE5-stations around local midnight within 10 minutes: OE5VRL/5, OE5JFL and OE5RBO.

 

VHF/UHF/SHF Contest March 2016

March 6th, 2016

The contest is over and there are new ideas in my mind, how to improve for the next one. Even though I am using a homebrew KST-client beside the browser based one, arranging skeds in the ON4KST chat is still the bottleneck in operating the contest. I fear, many requests will disappear from the screens of many operators, before they can take notice. No reason to argue for me, instead I will continue working on my KST-client projekt.

RA-Maps jn49cv 2016-03-06 1296QSOs on 1296 MHz

I had much fun in using Aircraft Scatter on 1296 MHz for most of the 58 QSOs, logged on this band. The average was 372 km/QSO and I worked 37 grids in 12 countries. And again HG7F became the ODX with a distance of 817 km. Weather was very bad and many of the contest teams weren´t able to go to their usual locations. So this time only one Station could be worked from JN99, compared to seven in July 2015.

QSL for first Satellite Bounce by Amateurs arrived today

December 23rd, 2015

PI9CAM QSL

Today PI9CAM´s QSL for the first Satellite Bounce QSO via an unmanned spacecraft done by radio amateurs arrived by mail. As we know, there have been previous commercial attempts for Satellite Bounce in the early 60s using ECHO 1 and ECHO 2 which were inflated balloons with diameters of 30 and 41 m. The initial orbits were at heights of 1500 km and 1200 km.

The theoretical radar cross section (RCS) of ECHO 1 was 700 m², but measurements by military radar stations resulted in 900 to 1000 m² in the beginning. Later, the satellite deformed and shrunk. OKEAN-O, the one we used, has a radar cross section of 18 to 20 m² but is in a much lower orbit at a height of 650 km. This leads to quite similar unit power budgets, regardless the difference in size,

Enjoy the movie “The Big Bounce” about our predecessors 55 years ago!