http://w5tsu.net/tags/sdr/ Recent content in SDR on W5TSU Hugo -- gohugo.io en-US Copyright 2017 Mark Grennan Tue, 17 Feb 2026 10:48:05 -0600 http://w5tsu.net/posts/hermes-lite2/ Tue, 17 Feb 2026 10:48:05 -0600 http://w5tsu.net/posts/hermes-lite2/ The Hermes-Lite 2 (HL2) is a low-cost, open source HF SDR transceiver. This is a truly fantastic radio it competing head to head with the Flex radio. The whole project – hardware and software – is fully open source, led by Steve Haynal (KF7O). Although this radio has been around for years the community support is poor. My hope is this post will help document what I’ve found for my own use and maybe help others. http://w5tsu.net/builds/am-broadcast-band-filter/ Sun, 23 Jul 2017 11:06:17 -0500 http://w5tsu.net/builds/am-broadcast-band-filter/ For the W5TSU.net:8030 receiver I build a broadcast band filter. This should front end overload and intermod created by these stations and allow for better Ham band receiption. I also wanted to learn how to build my own coils. I found a design at the vk3il blog. This filter was modeled with the ELSIE (free version). It is a 7-pole Chebychev filter with cutoff frequencies of 1.7MHz. I started by winding some coils from 22, 26 and 30 awg magnet wire. http://w5tsu.net/posts/kiwisdr/ Fri, 11 Jul 2014 11:54:24 +0200 http://w5tsu.net/posts/kiwisdr/ 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.