CURRENT MOON PHASE
Aurora:status
E-skip 2m:status
E-skip 4m:status
Geomag:status
logo mmmonvhf
Logo-GES

4U1ITU 29/09/2018

(Od:OK1AXH)
10368sunnoise-nahled

Sun noise on 10GHz

moonnoiseinwind-nahled

Moon noise in wind

Ahoj, zdravím a posílám krátkou informaci ze Ženevy. Večer jsme začali normálně na 3cm a 23cm spojení. Během noci se ale velmi silně rozfoukalo až do nárazů 60km/h, což již portejblový setup moc nesnáší. Udělali jsme tedy jenom 10 QSO na 3cm a 4 QSO na 23cm. Potom jsme se rozhodnuli antény zakotvit, hrozilo převrácení. Chodil jsem to kontrolovat každou hodinu, ale situace se mírně zlepšila až nyní. Jdeme připravit 13cm a 6cm, protože nevíme, zda pondělní předpověď na vítr 80km/h nepříjde již v neděli. Zkusíme udělat maximum na obou pásmech, ačkoliv 6cm bylo v plánu až na neděli. Dnes v noci byl vítr tak silný že rozkmitával celý systém pro 3cm až jsem ztrácel na SDR šum Měsíce. V příloze je obrázek šumu Slunce když jsme měli včera krásné slunečné odpoledne a měření šumu Měsíce v noci.

73 všem  (Díky za info Zdeňku a v pokračování je info z Moon-netu v angličtině)

 

Hi EME gang,
we have again big problem with the wind in Geneva. Last Moon pass we were able manage only 10 QSOs on 10 GHz and 4 QSOs on 1296 MHz before we were hit by strong wind which peaking 60km/h. First problems I was able recognize during CW 3cm QSO with Gerard PA0BAT when I suddenly did not see Moon noise on SDR. I lost Gerard and we were repeating QSO in couple minutes later. Than situation become worse and worse and we had terrible problem keep dish pointed to the Moon. Moon noise I have 1,2 – 1,3dB, but that moment it was vary from 0 to 1,3dB. Situation result with parking and anchoring both antennas. I was checking situation every 1 hour on the roof and no improves were observed. Early morning I decide to sleep little bit, because I was so tired. I have to apologize every one who was waiting for us. You can see the situation across EU where is so windy now. Weather forecast for Geneva says that in Tuesday wind will be peaking up to 80km/h. We are very scare, that it can to become early and we will have problems with antennas.

For next Moon pass we propose this and hope that we will be able to manage all according this plan.

Now we have prepared 2320 MHz in the 3,2m dish. 5760 MHz in 180cm dish. Wind calmed little bit down now and we hope that due to wider radiation angle of 6cm band we can to work via Moon many of you. We do not know what happen during Moon pass from Sunday to Monday and in this reason we want to operate 13 and 6cm together give a chance everybody work us on those bands. You know that I am positive tuned, but this situation is seriously not good now. On 180cm we are able manage to change also to 9 or 3cm, depend of wind gusts. So if anybody wants to work us on those bands, please be on HB9Q and let us know. As I say, we will try to do our best, because nobody knows what will be on Sunday night when is main day for 6cm operation.

I am again very much sorry about that, I can fight technical problems, mechanical problems, interference but not weather.

Sorry again and we will do our best here.

73 from Geneva

Attached is picture of Moon noise changing level in the wind gusts and Sun noise during nice sunny day before

Náhodné obrázky z galerií

sergey-rw3bp-alex-ua4hak

Galerie: Diplomy ARI

Frézování, závity, prostě krásná mechanická práce

Seminář 2016-96

Odolné předzesilovače od OK1FM