Posts by EU2AA

EU2AA · Sep 1st 2024

Richtig, das erste Modul des Systems wird noch dieses Jahr ins All gebracht.

EU2AA · Jan 27th 2022

Danke Andreas,
für die schnelle und ausführliche Antwort.
Ich werde nach den fehlenden Komponenten suchen und die Kommunikation testen.
73!
Vladimir

EU2AA · Jan 27th 2022

Andreas,

danke für die ausführliche Antwort.
Ich habe SDRangel F4EXB.

Zwei Fragen:
1. Wie aktiviert WSJT im FT8-Modus PTT?
2. Wie schließe ich RJ45 an PLUTO an?
--
73!

Vladimir

EU2AA · Jan 26th 2022

Quote from DL5CN

'The PoE-Plugs can be removed or changed (in my shack to Cinch).'

Andreas, I ask for a connection diagram in more detail

73!

Vladimir

EU2AA · Aug 27th 2020

Stephen,

LPF sollte vor dem MMIC-EINGANG und nicht am PA-Ausgang platziert werden.

Erkläre warum?

LPF2450 on FR4-0,6mm

[Blocked Image: https://eu2aa.com/photo/LPF2450.png]

C1,C3=1p8 – 6.4x4.0mm

C2=3p – 10.7x4.0mm

L1,L2=0.254x6.0mm

EU2AA · Aug 27th 2020

Quote from AMSAT-DL

Damit der ADALM-PLUTO ein sauberes Signal erzeugt, sollte man ihn maximal mit -5dBm, besser mit -10dBm aussteuern.

Es ist nicht obligatorisch. Der Schaltung fehlt ein Tiefpassfilter bei 2,5 GHz. Zum Beispiel wie hier zwischen R15 und C22.

[Blocked Image: https://eu2aa.com/photo/4BK4s.png]

PLUTO liefert ein digitales Signal zur Übertragung, und dies ist die Summe der ungeraden Harmonischen.

Ein Tiefpassfilter 5. Ordnung lässt nur die Grundfrequenz von 2400 MHz durch und wandelt den digitalen Ausgang von PLUTO / TX in einen analogen um.

Das Sperrfilter Z1 dämpft das Außerbandrauschen vom Sender.

https://observablehq.com/@eu2aa/eu2aa4b-n-1

Quote from DM5RM

Also sollten wir besser die Theorie vorrübergehend ruhen lassen

Johann Wolfgang Goethe

"Grau, teurer Freund, ist alle Theorie Unci gain des Lebens goldner Baum."

Hallo Roland,

Sie haben beide Recht, Sie und Goethe

-

73!

EU2AA · Apr 5th 2020

4. Telegraph mode using 1kHz tone generator,

placed in a common case next to the microphone, through acoustic communication

[Blocked Image: https://eu2aa.com/photo/Gen1kHz.png]

EU2AA · Sep 27th 2019

Please accept my condolences to the family, relatives and AMSAT-DL, Hanspeter Kühlen DK1YQ I remember well, it seems that this was only recently, 26 Feb 1991:

910226/1527z DK0MWX, 910226/1522z DB0EAM, 910226/1509z DK0MAV

de DB2OS @ DK0MAV

Hello Leo,

please pass the following message, with which I fully agree,

to all who worked together on Projekt RM-1/RUDAK-2.

The mailbox is now operating for a few orbits and we have

seen stations logged in from around the world, applauding

to the fruits of or joint effort.

CONNECTED to RUDAK-1

*** Recent RUDAK Users ***

==========================

DB2OS 12:36:23

JH7CKF 11:20:02

RK3KP 11:02:29

DF5DP 11:00:56

DG2CV 11:00:24

DL6DBN 10:59:54

DL6KG 10:59:53

G4ULS 10:56:12

G8NOB 10:53:17

DK1YQ 10:47:13

==========================

73 de AMSAT RUDAK

*****************************************************************

AMSAT-DL wishes to congratulate all members of the AMSAT-U-ORBITA

group in Molodechno and Moscow and Leonid Labutin, UA3CR, in

particular, to the successful launch and start of operations of

RADIO-M1/RUDAK II/AMSAT OSCAR 21.

We hope that this is the beginning of a long cooperation and

friendship.

Dr. Karl Meinzer, DJ4ZC Hanspeter Kuhlen, DK1YQ

President of AMSAT-DL Head of RUDAK Project Group

P.S.: Please convey our sincerest congratulations and thanks also

to the officials and fellows of the GEOS team.

*****************************************************************

Best 73s to Leo, Vlad, Alex

de Peter & The RUDAK-Group

(H)elp (C)heck (L)ist (R)ead (S)end (E)rase (D)ir (U)sage (Q)uit

RK3KP de RK3KP>

EU2AA · Feb 15th 2019

[Blocked Image: https://eu2aa.com/photo/EU2AA_RDA3566Q.jpg]

External TCXO 50ppb 25MHz, twisted pair PETV-0.2, multi-colored (dark red - on the case, golden - 25 MHz) is connected to the load 68 Ohm 0805, through 1000 pF 0805 served on 7 leg / RDA3566Q.

- the cable, even the thinnest, elementarily tears tracks from the LNB board with details ...

- soldered to pre-tinned holes, a 0.12mm tin, a thicker one does not climb.

It works stably, good gain.

I tried it on the 6th leg, it works too, but after a couple of minutes an instability appears, the gain drops by ~ 10 dB, then it gets worse ...

Power TCXO - + 12V 0,2A / 30mA - a separate wire.

with the lid closed:[Blocked Image: https://eu2aa.com/photo/EU2AA_OctagonSLO.jpg]

complete:

[Blocked Image: https://eu2aa.com/photo/EU2AA_OctagonSLO_3.jpg]

EU2AA · Feb 14th 2019

Quote from DB2OS

Indeed we all can be very greatfull to Qatar and the QARS for giving us this fantastic opportunity and for supporting worlwide friendship, humanity and education through Qatar OSCAR 100.

73s Peter

QatarOSCAR 100! Congratulations Peter!

EU2AA · Jan 27th 2019

Quote from DB2OS

Leonid Labutin UA3CR was a great man and I'm still in good contact with his son Eugene (RZ3AAO)..

Yes, you are right, Leonid was an interesting person and could “ignite” many of his ideas.

The story about Rudak-2

Leonid, UA3CR, revoked the license for violation. The package connection then we had an unresolved type. A community group was created, I entered there, wrote appeals to various authorities. However, the one-on-one format was more efficient. One of these meetings turned out to be successful, my arguments that “for Labutin his call sign UA3CR is not only more important than his name, but even air” had an effect. Nikolai Valentinovich laughed and said: “Well, you can give your Labutin, we will return the call sign”.

A couple of hours later, Labutina rang the doorbell of the apartment, Lyudmila Ivanovna, his wife, opened it and immediately from the doorway: “Volodya, save Labutina, do something !!!” He told me about the promise “from above”. Labutin immediately cheered up, says: “Isn't it time, you, in Molodechno, to make your satellite?” I told him what we were already doing, contract with Ministry of Geology. Approved Terms of Reference, instead of the wage item included on board an amateur repeater 146/435 MHz. Before that, all the RS“s were 29/146 MHz. Leonid caught fire and immediately offered to cooperate with AMSAT-DL. He told that "Ariana drowned AO-9 from Rudak-1", showed the magazine from Amsat-UK with a photo of the wreckage. "People have suffered, you need to take on their new Rudak-2." I liked the idea, I promised to do coordination. It was possible in just 6 months to include Rudak-2 in the documents.

Labutin himself, at the expense of Dmitry Shparo (you have a lot of photos of skiers on your site), traveled to Sorrey with the Agreement and arranged coordination up to 1 millimeter, 1 milliwatt, and 1 dB!

* pulled up my English, even found errors in your letters ...

Leo handed me your Album of schemes, unfortunately I didn’t have any CAD at that time, our schemes and drawings were then “in pencil” ...

Quote from DB2OS

Looking back, the Radio-M1 with RUDAK II and INFORMATOR-1 with the planned Koskon constellation were somehow ahead of time...

Yes, summed up the complete absence of ground stations. There were only 2 pcs. for testing.

EU2AA · Jan 27th 2019

Quote from DB2OS

Seems I was the first one to hear our RUDAK beacon to be turned on unexpectedly..

EU2AA · Jan 26th 2019

Thanks Peter!

EU2AA · Jan 26th 2019

Quote from DB2OS

I added also your above links to the AO-21/RS-14 page.

Peter @ DB2OS

links to the Russian version is better to add links with translation into English

http://translate.googleusercon…5p2MQTJrxUOJzw_3Wg8PKU5Sw

http://translate.googleusercon…ny0LZl8d0AObMoJJMkcu0sPqw

http://translate.googleusercon…tV4qz1CbVCKkwkow8bUXqzxJQ

http://translate.googleusercon…sgpTrXU9Mk2dzw7AQrFkiOvBQ

http://translate.googleusercon…2ZOQkwEnsKyEqbFn5OqNEATEA

EU2AA · Jan 26th 2019

Thanks Peter,

here is my old 1997 site

http://translate.googleusercon…5p2MQTJrxUOJzw_3Wg8PKU5Sw

http://translate.googleusercon…ny0LZl8d0AObMoJJMkcu0sPqw

http://translate.googleusercon…tV4qz1CbVCKkwkow8bUXqzxJQ

http://translate.googleusercon…sgpTrXU9Mk2dzw7AQrFkiOvBQ

http://translate.googleusercon…2ZOQkwEnsKyEqbFn5OqNEATEA

congratulations on the successful launch of PHASE4 - Es’Hail2

See you through PHASE4 - Es’Hail2!

--

my 73!

EU2AA · Jan 25th 2019

Dear Peter,

accidentally visited the Amsat-DL website and read that, according to your story, the main name, Radio-M1, disappeared, and Radio-M1 / AO-21_RS-14 along with our AMSAT-U-ORBITA “migrated” to the east, for 600 km , from Molodechno to Kaluga:

https://amsat-dl.org/amsat-oscar-21-radio-sputnik-14

AMSAT OSCAR-21 (Radio Sputnik-14)

I regret that your organization’s memory turned out to be so short ... only 28 years old ...

--

73!

Vladimir Chepyzhenko,

Chief Designer INFORMATOR-1 and Radio-M1 / AO-21/RS-14

EU2AA, ex RC2CA, eu2aa(@)tut.by

KO34KI

Applications.

1. Agreement in English

2. Agreement in Russian.