Petit tour a F6KBF aujourd’hui, pour peaufiné un quart d’onde VHF, pour le mobile, j’en profite pour passer une NAGOYA UT-106UV a l’analyseur, vendu sur ebay aux alentour de 4€, pour ce prix, c’est une copie de la Nagoya Genuine
Sur embase magnétique, VHF/UHF, gain annoncé 2.15db, 3metres de cable RG174 sur entrée SMA.
Un passage étonnant sur analyseur DG8SAQ, nous montre une perf a -36db sur 145.500
Mesure réaliser (vhf uniquement) sur un large plan de masse, le toit de ma voiture.
This little cheap Chinese transceiver can be found on Ebay, or Aliexpress for 60$, supporting VHF/UHF, can Tx up to 25W. A complete description and testing page is available on G7EOB website
You plan to drive for a long way? broadcast your position on APRS Network, with some components you can build a small tracker. Arduino sketch is based from Trackuino, EA5HAV Javi
Trackuino is more intended to be used on ballon flights, but can work for APRS general purpose.
With some minor modifications, the tracker can send position depending of speed of the vehicle. Reading var gps_speed parser and set the APRS_PERIOD do the job.
Just bellow, is the schematic, D3 is used to generate the modulation, through the trimmer you can adjust the modulation level, D12 is used to saturate the transistor and do the PTT, GPS1 is GPS shield, but for my test i have used a old EM406. A0 is used to monitor the battery voltage with a resistor divider. 10k/3.3k, a temperature sensor LM60, is connected A1. All parameters, like callsign, Gps baudrate, pin assignation …. can be set into the config.h file
You need:
Yes, i need a little nice box
27.05.2018
It’s more clean with a true pcb and a nice box.
Download file (pcb ARES file, Arduino sketch, shematic …)
Humm, i need a large case to put everything, looking for something like, 400mmx500mmx200mm, may be a good candidate.
Finally find a good choice, Panaro MAX505S IP67, fo 99€, a very robust and light case, i can package every material i need!
– My ICOM 7300, with EMI filter
– A Lead Battery 12v 7Ah, with charger
– A Power cable
– A small mini volt-meter
– The MP1 Kit Antenna
– A Counterpoise
– 5 Meters of coax cable
– The HandleMic
– The Headset
– A Small log book
– & Camo Net 😉
Le satellite PICSAT lancé le 12 janvier 2018, émet des télémesures sur 435.525 MHz avec le protocole BPSK à 1200 bauds.
En attendant le logiciel PicTalk qui sera mis trés bientôt à disposition des amateurs et radioamateurs, il est possible de décoder et d’envoyer les télémesures en se basant sur la méthode suivante.
PicSat is a nano-satellite aimed at observing the transit of the young exoplanet Beta Pictoris b in front of its bright and equally young star Beta Pictoris, and at demonstrating an innovative technological concept to use optical fibres for astronomical observations from Space. On this website you will find all the updates and information about our exciting mission. If you are a radio amateur with a working radio station, you learn how you can participate by receiving and relaying data and help accomplish the PicSat science goals.
PicSat has been designed and built by our small team from the High Angular Resolution Astronomy group at the Paris Observatory / LESIA laboratory in France.
