I reported a build problem with sdrangel and the maintainer sent me back a URL
https://build.opensuse.org/package/show/hardware:sdr/sdrangel
All packages listed at http://download.opensuse.org/repositories/hardware:/sdr/
Available also as one-click installs from OBS (openSUSE Build Service).
The Tumbleweed repo.
cat /etc/zypp/repos.d/hardware_sdr.repo
[hardware_sdr]
name=Software Defined Radio related packages (openSUSE_Tumbleweed)
enabled=1
autorefresh=0
baseurl=http://download.opensuse.org/repositories/hardware:/sdr/openSUSE_Tumbleweed/
type=rpm-md
gpgcheck=1
gpgkey=http://download.opensuse.org/repositories/hardware:/sdr/openSUSE_Tumbleweed/repodata/repomd.xml.key