Aug 31
50 MHz
28 August 2009: I have been a few days "out of town". Today we saw a late Es opening to SV and EA. A few stations could be worked.
19 August 2009: I did some EME listening and tropo beacon "DX" receiving with SDR software. Today we have some small Es to CT. Only beacons - no humans ...
13 August 2009: Some strange signals this morning. Lots of Es from the east - no stations. Worked OZ1DOQ(JO74mx-new#) in his Bornholm 4/6m expedition.
12 August 2009: I did some listening in the Perseids and a few meteorscatter contacts. Nothing new.
11 August 2009: Perseids, some MS contacts made. Nothing special. In the afternoon there was some Es to LZ, UX and I3
9 August 2009: Strong video signals from UA-TV; some station audible. It is late in the Es season where people get tired.
8 August 2009: I was not QRV through the last days; I have heard I missed nothing. Today some stations heard and worked from south-east.
5 August 2009: Nothing yesterday. Today there are very strong signals from southern Germany, Switzerland and Northern Italy. I worked a good number of stations. I thought 2m might open, but it did not. Some double-hop video signals from the east were received, but no stations heard.
3 August 2009: Massive opening to south-east again. I did not have much time and have been listening a bit. 6m sounded like 40m with very strong signals present. Many closer stations could be heard via backscatter.
2 August 2009: Band continues to be open to south-east. Nothing special heard. Sporadically I looked over 6m and heard some EA, CT and worked a few I8. Around 18.20UT I saw in the cluster people working caribean stations. I turned west and immediately could work WP2B (FK77) through the noise of neighbours plasma TV. At least a new grid.
1 August 2009: The new preamplifier also seems to improve very audible. I supposed it would have an effect on EME signals only. Band opened in the afternoon very fine and I worked YO, LZ, Z3, SV, 5B4 and 4X. 5N0OCH could only be heard very weak here.

432 MHz
11 August 2009: Checked sunnoise on 70cm and I get up to 7 dB at sunset. Normally I see abaout 4dB. There seems to be a good amount of ground gain. Worked number of stations in the NAC.
10 August 2009: That SK1UHF beacon is still there even after a weather change.
9 August 2009: SK1UHF and SK7MHH beacons over 500 .. 600km path are very strong. Noone is QRV.
1 August 2009: New preamplifier installed. Hearing very much better now ! I worked YL3AG (KO06 - #102) with my 15 Watts over 777km path in the evening.

WSPR
28 .. 31 August 2009: WSPR is running again with the RX320D. Today I put some ferrites to my HP TFT monitor. This made the bands (30m and 40m) alomost noise free. I thought that monitor was OK ...
22 August 2009: My RX320D came into new life with WSPR - only receiving. That little box works really well on 30m.
16 August 2009: I ran WSPR on the last three nights (30m, 40m, 20m) into the 40m wire dipole untuned. My 2 watt signal was heard into Australia on 40m several times.

7 MHz
17 August 2009: Oh, after long time a made a QSO here ...

Posted by Christoph Petermann

Aug 16
WSPR (Weak Signal Propagation Reporter) is a piece of software written by K1JT starting in 2007. I have been doing this successfully that year and a little bit in 2008. I use my TS690s with power output fully turned down, which gives me about 2 watt then. I only have one antenna this is my 40m full size wire dipole. With only 2 watts of output from the transmitter I "risk" to do 2 minute transmissions without matching the antenna. 20m is not very successful, but 30m works OK for me. 40m is good with a very good antenna match here. I suffer somewhat from the overall noise present on the short wave bands, but still I can receive stations from all over the world. If you want to know more about WSPR have a look here: WSPRNET.ORG. This should give you an idea of what is is. After a long pause, I ran this WSPR again. The 30m band has been most successful. Reason for this is of course the highest activity is here. 40m worked too, but with only 20% of the activity compared to 30m, you will get lessd response of course. Activity on 20m is weak - so was the response. You will hear my signal again.

Posted by Christoph Petermann

Aug 7
Every time you want to work THE DX, you will find some high level noise on the band. Recently WP2B was strong enough on 6m to overcome this noise - I was lucky. Yesterday (4 August) I got fed up with this and I went out to my neighbour and try to find the source(s) of the trouble. Just to make it short: He was very cooperative and we found an USV for the computers which seems to have some oscillation in the power supply. Second source was a Philips LCD TV set putting out a broad noise. We only needed a few minutes to find this.
On 7 August the cores arrived, my neighbour istalled them himself - well done - ├ęt voila, all noise is almost gone. Very little broadband noise is still audible, when the TV set is switched on. In this view I am happy again ...

Posted by Christoph Petermann

Aug 1
Today I took down the tower and checked everything. All was OK and I installed receive preamplifiers for 432 MHz and 50 MHz very close to the feedpoint of the antenna. While the 50 MHz amplifier is a commersial type, the 70cm amp is completely homemade with an old MGF1203 inside and 0,66 dB noise figure including all relais. For 70cm I expected a lot of improvement, and indeed I have it. Beacons not audible with pre-amp OFF are well in the receiver with the machine switched on. I did not expect an audible improvement on 50 MHz, but it is well audible. This amplifier has a noise figure of 0,95 dB I measured with a HP8970B recently. I am a bit astonished...
New images of the antenna system are HERE

Posted by Christoph Petermann

© Christoph Petermann DF9CY - 2017