I’m working on the design of a APRS Tracker transmitter. The dream is a self contained radio transmitter, modem, and controler with a bluetool connection to a tablet running Xastir. There are lots of designs and APRS Trackers. Some are almost what I’m looking for. Many are out of date or the designer is dormant. The bigest example is MicroModem. Wounderful design from 2014 but the deveoper is… In his how words… “Long Time, No See”. »
This is my grandfather’s ham license from 1952. My mother told me stories of her and her father lessioning to the radio. Him teaching her morse code. I picture in my mind, mon sitting on her fathers lap and her talking to some ham on AM. My mother tough me my name in code when I was five. – .- .-. -.- W5TSU »
I’m fascinated by the WSPR (http://wsprnet.org) network and found out you can build a transmitter station with an Raspberry Pi. So, because I have a few Raspbery Pi comptuers setting about doing nothing, it’s time to put one to work. The code for this is at (https://github.com/JamesP6000/WsprryPi). WSPR net has some documentation on it (http://wsprnet.org/drupal/node/5353). The output from the RaspPi is a square wave so lots of filter is needed. (http://www. »
I’m working on getting my extra class license. Here are a few things I have found that help. Even with a background in electronics and years of being a ham I still score about a 50% on any practice test I take. Here are several places to get study guides and take sample tests. I use my phone to take practice test ofter. Check out Dave Casler, (KE0OG) youtube videos. These are very nice and a great resource. »
Start here: http://sdr.w5tsu.net:8073 ( Kiwi SDR ) http://sdr.w5tsu.net:8074 ( Kiwi SDR ) http://sdr.w5tsu.net:8075 ( OpenWebRX ) This includes both HF, VHF, and UHF I have a new radio. I picked up a KiwiSDR (http://kiwisdr.com/) receiver from Seeed. (https://www.seeedstudio.com/KiwiSDR-Kit-p-2725.html). The KiwiSDR was developed by the Funkamateur John Seamons ZL / KF6VO, is a branch of the OpenWebSDR project and realy started life as a kickstarter project. This is the best HF (10kz-30mz) receiver I own. »