Tag Archives: 2320 MHz

F5ZNI: Beacon #34 on 13 cm

December 29th, 2019

By performing my daily beacon check, I noticed a weak keyed carrier in between the spacing of the F1 signal of DB0UX on 2320.900 MHz. I assumed to see F6DWG/B, which I monitored around the .900 before. But it didn´t take long to find out, that the real signal (mark) was the lower carrier and after a while I learned, it was F5ZNI using reverse F1 keying. Later in the evening the signal increased due to good tropo conditions, as can be seen in the pictures. F5ZNI is the 34th beacon I received in the 13 cm (S) Band

F5ZNI and DB0UX in PowerSDR

I am always happy about new beacons, but this case is an example, why beacon coordination and using standards is most important. First of all, reverse F1 keying is always bad, as you are used to listen to the upper carrier of the signal. In case there is an unkeyed carrier in between the text, you can easily identify the mark, where to listen. But if there is text keyed nearly all the time, as F5ZNI does, it is rather time consuming until the mark is identified.

The DB0UX signal was strong and the frequency is locked to a reference, while F5ZNI is drifting a little. So it was obvious, that there was a second signal in place. If the french beacon would have been locked to 2320.900 MHz too and would use the standard A1 or F1 keying, there would have been no chance for me to monitor or even to take notice of it.

An excerpt from BEACONSPOT.UK shows the situation on 2320.900 MHz:

BeaconNominal FrequencyLocatorLast SpottedLast FrequencyStatus
F6DWG2320.900JN19BQ2019-05-312320.898Dead/lost
HG3BUC2320.900JN96CC2019-10-112320.897Operational
OZ5SHF2320.900JO45VX2019-08-242320.900Operational on spot date
DB0MJ2320.900JO31UB2019-12-292320.905Operational
ON0TB2320.900JO30BM2019-09-202320.897Dead/lost
DB0UX2320.900JN48FX2019-12-292320.900Operational on spot date
F1ZCC2320.900JN08XSUncertain - new spot required
SR1SHS2320.900JO73PG2019-12-302320.900Operational
IQ5FI2320.903JN53SR2019-12-282320.901Operational
F5ZNI2320.904JN19BQ2019-12-302320.899Operational on spot date


Depending on the location and the conditions, there will be more or less interference on 230.900 MHz

So I am urging all beacon keepers to make use of the service provided by the
IARU R1 VHF/UHF/MW Beacon Coordinator. When designing a beacon, please respect chapter 11 “Beacon Requirements” in the IARU-R1 VHF Handbook.

OK0ER via Aircraft Scatter on 13 cm

October 22nd, 2018

As OK0EA was audible this morning on 23 and 13 cm I had a look for other, more distant beacons in OK. After noticing a very short and weak signal on 2320.9085 MHz, I monitored the frequency over a couple of hours and saw many doppler shifted traces, typical for aircraft scatter. Very soon I copied “…9DP…”, when a B777 crossed the path and was sure to see OK0ER in JN99DP in the waterfall diagram. At least 4 Airbuses A380 crossed the path one after the other, giving nice reflections.

OK0ER transmits 1.5 W into a slot antenna in 675 m asl. The distance is 722 km.

 

New 13 cm WebSDR in Eindhoven JO21RL

September 9th, 2018

Rob, PE1ITR, told me about a planned WebSDR for 2.3 GHz in Eindhoven, when we met recently at the EME conference. He promised to send an email, as soon as it is up and running: websdr.pi6ehv.ampr.org:8901

Needless to say, the email arrived and I turned my dish to Eindhoven. Now I am delighted by my own signal. Amazing to see it increasing by reflections on an A380 passing the path, while two Dutchmen are talking a little lower in frequency.

 

Microwave Contest June 2018

June 3rd, 2018

As can be noticed now, the fears, many Microwavers would prefer to go to the HAM RADIO fair in Friedrichshafen, were overdone. It was a nice contest and in the 23 and 13 cm sections I worked more stations than in the last contests in May and March, as well as in all previous microwave contests I participated in June before. As can be seen in the maps, my honey pot is the east.

QSOs on 23 cm in Microwave Contest June 2018

The signal levels were very strong and I managed to work HA5KDQ on 23 cm in SSB over a distance of 830 km via Aircraft Scatter (ODX). To be honest: I am sure, we would have been faster in using CW 😉

QSOs on 13 cm in Microwave Contest June 2018

Working on 13 cm was big fun and ODX was HG7F over 817 km in a quick QSO in CW (as usual). When I went to bed at night, I already had 22 QSOs on this band with an average of 457 km per QSO.

Hannes, OE3JPC, was so kind, to send an audio record of my signal on 13 cm.

First steps have been done on 3 cm. But there is a lot of potential for improvements.

So it was not really a problem to quit two hours earlier to attend a barbecue with the family.

New Beacon DB0WML on 13 cm

May 7th, 2018

The other day I noticed some cluster spots about a new beacon DB0WML in JO31MU on 2320.910 MHz. So I had a look for it today. Nothing via tropo, but nice reflections on airplanes.

At least I was bearing to an A380 in a distance of about 30 km at a height of 12 km with 33° elevation, to record this clip.

Also I was lucky to get a snapshot of this particular bird!

The beacon is runnung 1.5 W into a 10 dB slot antenna according the information in beaconspot.eu
The beacon is operated by DARC local chapter N40, keeper is Rudolf, DK8QU.

The screenshot shows DB0UX on 2320.900 MHz, DB0MJ on .904 and DB0WML on .910 in good Neighbourhood.

VHF/UHF/SHF Contest May 2018

May 6th, 2018

It´s one of the rare moments in the life of a Radio Amateur, when his shack is cleared up. Beyond believe, everything was up and running 2 hours (!) before contest time. Being a kind of bewildered, I sorted the stuff on my desk. The amazing result can be admired in the photo I took hereafter.

Starting with a nice QSO with M1CRO in SSB on 23 cm, I tried the new 3 cm Equipment, mounted on the VHF/UHF pole. 1 W into a 50 cm dish should be enough to collect first experiences. Two QSOs over 100 km were entered to the log. Quite nice, but further tests showed, that the topography is not ideal to cover larger distances, without the help of e.g. tropo, aircraft or rain scatter.

QSOs on 23 cm in blue, on 13 cm in red

Then I had my focus on 1296 and 2320 MHz, as usual. At least 58 QSOs, 36 squares and 14 DXCCs on 23 cm and 32 QSOs, 25 squares and 10 DXCCs on 13 cm have been logged. ODX, as last year, was HG7F in JN97KR over 817 km on both bands. Having an easy exchange on 1296 MHz, it took us nearly 20 minutes of hard work to puzzle a QSO on 13 cm as well. I remeber, last year it was vice versa.

OZ7IGY and friends

December 22nd, 2017

Tonight I monitored OZ7IGY on 2,320.930 MHz via aircraft scatter. It was nice to see other beacons appearing shortly in the waterfall diagram.

OZ7IGY and friends in time lapse

From left to right:
2.320.900: DB0UX, JN48FX, 105 km, tropo
2,320.910: DB0XY, JN51EU, 263 km, aircraft scatter
2.320.920: DB0VC, JN54IF, 509 km, aircraft scatter
2,320.930: OZ7IGY, JN55WM, 670 km, aircraft scatter

The dish was bearing 20° to OZ7IGY. The -3 dB beamwidth is just 3.2° on 13 cm.

 

Windmill Scatter

August 30th, 2017

As the weather forecast promised heavy thunderstorms for today, I was looking out for scatter points on 13 cm. Pointing to eastern France, I found a heavily scattered signal of DB0UX in JN48FX in 204°.

But the sound was quite strange and rhythmic. When taking a look out of the window, I saw the dish pointing at two windmills in 1 km distance.

This kind of scatter is not very helpful, but a nice experience anyway.

VHF/UHF/SHF Contest May 2017 – Record breaking again!

May 7th, 2017

After the unexpected good result in March on 13 cm, I had a special focus on this band in May contest. Last year I marked my new record in the number of stations worked on 23 cm, this year I improved the new record from March in worked stations on 13 cm. Particularly in the last hour I had the ambition to log at least 40 Stations. So I had QSO #40 in the last 5 minutes with Detlef, DJ3AK, in JO52GJ, 322 km, using aircraft reflections on planes just 50 km from my location, elevating the dish up to 10°: Power Aircraft Scatter 😉

QSOs on 13 cm

With QSOs to Poland, Hungary and Belgium three new countries could be added to the 13 cm list. HG7F (817 km) is my new aircraft scatter ODX. Also some new grid squares could be logged.

And again: After the contest is before the contest! A lot of ideas are in my mind, what has to be improved for the next competitions!