New WSPR station

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.gqrp.com/harmonic_filters.pdf). A kit is avaible at (http://www.kitsandparts.com/univbpfilter.php).

»

Studing for my Extra

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.

»

Author image MARK

KiwiSDR (UPDATED)

Start here:

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. With the propagation so bad (its 2017) hams are using web based SDR receivers to make contacts. I share my SDR because I use other’s SDRs. Check out the list at (http://sdr.hu).

»

M17Project

M17 is a digital radio modulation mode, like DMR, D-Star, or Fusion, developed by Wojciech Kaczmarski (SP5WWP) in 2019. Unlike other protocols, M17 has every part of the protocol open source. See: M17Project.org.

OpenRTX is an open-source project used to replace the firmware in commercial amateur radios. See: OpenRTX.org.

OpenHT is a hardware project working to build and Open Hardware Handy Talkie. It is based on FPGA design - a complete Lattice Radiant project for the LIFCL-40-7SG72C.

»