Lire la suite « Standalone HAM modulation generator »
This comes from the term « Poor Ham’s Scalar Network Analyzer » It is just a sheap antenna analyser.
PHSNA Features :
(8.5€ including shipping to France, 11€ international)
Now, PCB are available with SMT mounted, connectors, era2sm.
Sommaire :
1 Radioamateur c’est Quoi ?
2 Bon d’accord, mais il y a internet !
3 Qu’est ce l’on peut faire ?
3-1 La phonie
3-2 Le morse CW
3-3 Les modes numériques RTTY, PSK31
3-4 La géo-localisation APRS
3-5 La radio par satellite
3-6 La transmission d’images SSTV, DRM
3-7 La radio orientation
3-8 La capture d’images météo
3-9 Quoi d’autre ?
4 Je veux débuter, je commence par quoi ?
4-1 Le Club
4-2 Ecoute, surfe et bricole.
5 Notions élémentaires
5-1 Les bandes de fréquences
5-2 La formule
5-3 Quelques antennes
6 Préparer la licence
7 Lexique
Tous ces chapitres son détaillés dans ce fichier PDF (14 pages) en français :ham_tuto
73 F4GOH
Introduction
Do WSPR, JT65, PSK beacon, APRS tracking, APRS decode, weather station, antenna analyser, modem with the same hardware. All controlled by HTML pages with wifi access point. Then use your smartphone to manage the boards.
This beacon is built around 3 elements :
The red adapters can’t fit on sheild at the same time, you must choose one of them (HF or VHF).
Multipurpose Beacon characteristics:
Introduction
This esp8266 board has a DHT11 (temperature and humidity sensors). With some changes it can be able to use it as an APRS weather station.
Lire la suite « AI-Thinker t5 board as APRS weather station »
Introduction
Generally weather stations are very expensive. You need also a computer or a raspberry to upload data on an APRS server. The weather station described here is very simple. Just an esp8266 and a BME280 (Cost 7$). For the moment the station measure temperature, humidity, pressure. In some weeks, I add wind speed and direction. Measurements are uploaded to an APRS server automatically. Weather datas are also logged into esp8266. So you can draw curves with LibreOffice Calc. Time is synchronized with NTP (Network Time Protocol). You don’t need to compil source code. I add configuration menu into ESP8266.
Esp8266 include a little web page to see Weather datas.
Weather station characteristics:
Introduction :
Generally Automatic Atu are very expensive.
However the atu is composed essentially of relays commanding inductors and capacitors. Most of the time the L match circuit is used. For several months I have been thinking about a way to make one around an Arduino and using economic cards. It will not be necessary to spend more than 70$ for an ATU of 100W.
In addition it can be installed outdoors and controlled remotely by an rs485 link
ATU characteristics:
The ATU is based on modular cards:
Pcb available mail me : f4goh@orange.fr
Par F4GOH : f4goh@orange.fr
Caractéristiques :
Le modem est basé sur les circuits suivants :
Pcb available mail me : f4goh@orange.fr
1 Introduction
Cela fait maintenant presque un an que je m’intéresse à la transmission de données numériques en FM avec d’un TRX classique disposant de la connexion Packet (mini din 6 broches).
Mon objectif étant de transmettre un fichier informatique en simplex, j’ai découvert la GMSK (Gaussian Minimum Shift Keying), puis différents protocoles qui utilisent cette technologie.
By F4GOH
The main characteristics of Vna analyzer are:
The VNA is based on the following components:
ebay-links : components list
Pcb available mail me : f4goh@orange.fr
Introduction :
This HF VNA is an adaptation of the scheme described in the Russian site RA4NAL. I use an Arduino Nano and system measurement on the same board. I add rotary encoder and lcd display to use the VNA in standalone mode. The PC software is Jvna same as miniVna from DL2SBA.
Caractéristiques :
Emission APRS seulement
PCB disponible, PCB available on ebay
Le Tracker est basé sur un Arduino NANO.
