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Forum Technology Interest Group Erpe-Mere
Agenda 7/3 - Afdrukversie

+- Forum Technology Interest Group Erpe-Mere (http://www.on4lar.be/forum)
+-- Forum: Onze club (http://www.on4lar.be/forum/forumdisplay.php?fid=1)
+--- Forum: Vrijdagavond in de club (http://www.on4lar.be/forum/forumdisplay.php?fid=13)
+--- Discussie: Agenda 7/3 (/showthread.php?tid=280)



Agenda 7/3 - ON5YK - 03-01-2014

- >>>>>>>Proficiat aan al de geslaagden voor de basisvergunning, ten gepaste tijde kunnen we een glas heffen op jullie succes!<<<<<<<<<<<<<<<<<<<<

- Herstelling van een lampenradio faze 2: waarom is de weerstand van 2kOhm doorgebrand? Wat is de oorzaak? Hoe de fout opsporen? (Marcel & Jean - op de keukentafel!)

- De stofzuiger in de shack faze 2: hij werkt wel, maar zal niet blijven werken, hoe lossen we dit mysterie op? (Jan & Wilfried - shack)

- De hambeurze van Rosmalen komt eraan? Wat doen we met de onherstelbare verticale HF antenne van de club? Zoeken we daar een alternatief?

- Uitleg over een technisch experiment met de simultane lancering van 200 micro amateursatellieten op 16 maart aanstaande:

KickSat deploying the 200 Sprite satellites
Launch of two hundred 437MHz satellites
The largest ever launch of 437 MHz satellites is planned for March 16 at 0841 UT when 200 Sprite satellites will be launched on the SpaceX Falcon 9 CRS 3 mission
They will be deployed into a 325×315 km 51.5 degree inclination orbit. You should be able to watch the launch live on NASA TV at http://www.nasa.gov/multimedia/nasatv

A Sprite is a tiny, 3.5 by 3.5 cm, single-board spacecraft that was developed by Zac Manchester KD2BHC. It has a microcontroller, radio, and solar cells and is capable of carrying single-chip sensors, such as thermometers, magnetometers, gyroscopes, and accelerometers.

The 200 Sprites are carried in a 3U CubeSat called KickSat. They are stacked atop a spring-loaded pusher and secured by a nichrome burn wire system.

On reaching orbit KickSat will perform a de-tumble maneuver and establish communication with Cornell University’s ground station. After check-out, the spacecraft will be put in a sun-pointing attitude and spun up to maintain that attitude.

A command signal from the ground station will then trigger the deployment and the Sprites will be released as free-flying spacecraft. After deployment, telemetry and sensor measurements from the individual Sprites will be received through Cornell’s ground station in Ithaca, NY, as well as several other amateur ground stations around the world.

Due to the low orbit Sprites will have a short lifetime before they re-enter the atmosphere and burn up. In the best-case scenario the orbital lifetime could be six weeks but realistically it may be considerably shorter depending on atmospheric conditions.

All Sprites operate on a single frequency of 437.240 MHz and use Code Division Multiple Access (CDMA). The transmitter runs 10 mW output of Minimum Shift Keying (MSK) modulated binary data with each data bit modulated as a 511 bit Pseudo-Random Number (PRN) sequence. The ITU emission designator is 50K0G1D.

The KickSat CubeSat has downlinks on 437.505 MHz and 2401-2436.2 MHz.

KickSat Sprite Ground Station by Andy Thomas G0SFJ
http://kicksat.wordpress.com/support/kicksat-ground-station/

British Interplanetary Society: Sprite Technical Summary
http://www.bis-space.com/2013/03/09/9301/kicksat-technical-summary

KickSat project information
http://zacinaction.github.io/kicksat/

KickSat on KickStarter
https://www.kickstarter.com/projects/zacinaction/
kicksat-your-personal-spacecraft-in-space/

Check this site for the latest CRS 3 launch date
http://spaceflightnow.com/tracking/



Idee? Laat maar weten hieronder!

73s ON5YK


RE: Agenda 7/3 - on4gin - 03-02-2014

Punt 3 Rosmalen, een eerste alternatief is zeker de 1 ele. quad voorstel van Marcel.
We hebben al een plaat en er is nog nodig stokken.

Een extra alternatief is uitkijken naar een vertical 3 bander van cushcraft of Fritzel.

Voorzitter hoeveel krediet krijgen we?


RE: Agenda 7/3 - on4btw - 03-03-2014

Is aan die "onherstelbare verticale HF antenne" echt niets meer te doen ?


RE: Agenda 7/3 - on4gin - 03-03-2014

hangt af van wat er met die traps is !
We kunnen de radialen vervangen door 1/4L radialen ipv die verkorte.


RE: Agenda 7/3 - on5qt - 03-06-2014

(03-01-2014, 06:42 PM)ON5YK schreef: - Proficiat aan al de geslaagden voor de basisvergunning, ten gepaste tijde kunnen we een glas heffen op jullie succes!

- Herstelling van een lampenradio faze 2: waarom is de weerstand van 2kOhm doorgebrand? Wat is de oorzaak? Hoe de fout opsporen? (Marcel & Jean - op de keukentafel!)

- De stofzuiger in de shack faze 2: hij werkt wel, maar zal niet blijven werken, hoe lossen we dit mysterie op? (Jan & Wilfried - shack)

- De hambeurze van Rosmalen komt eraan? Wat doen we met de onherstelbare verticale HF antenne van de club? Zoeken we daar een alternatief?


Idee? Laat maar weten hieronder!

73s ON5YK
Om te beginnen met de antennes: de vertikale kan nog altijd gerepareerd worden maar dan met een andere straler afkomstig van een andere vertikale. Best is van alleen 20, 15 en 10 m band te installeren. Misschien zijn er ergens traps te recupereren.
De radialen voor de freq. 3.5, 7, 10 Mhz moeten weg en de andere radialen kunnen vervangen worden door draden van een kwart golflengte wat de breedbandigheid ten goede komt.
Ik probeer tegen vrijdagavond de straler te demonteren.
Er is ook een discone antenne in de maak. Ik stel een bouwpakket samen en wij kunnen dan op de shack het geheel samenstellen (soldeeroefening).
In Rosmalen eens een en ander opzoeken.

Grtn 5QT