We are trying to install the QTango on Ubuntu 14.04 (Ubuntu Trusty).
We were following the thread

From there we came across the PPA packages for the Tango and Qtango
Links to those packages are:
Tango Core: https://launchpad.net/~tango-controls/+archive/ubuntu/core
Tango Gui: https://launchpad.net/~tango-controls/+archive/ubuntu/gui

We tried to add the packages as
$ sudo add-apt-repository ppa:tango-controls/core
$ sudo add-apt-repository ppa:tango-controls/gui
but it shows unable to add the PPA.

After that we to manually added PPA as,
deb http://ppa.launchpad.net/tango-controls/gui/ubuntu trusty main
deb-src http://ppa.launchpad.net/tango-controls/gui/ubuntu trusty main

But in next step of procedure (i.e. sudo apt-get update ) there is an error about the above PPAs.

What we understood is that those PPA are not available for Ubuntu trusty.

Please guide us if we can install QTango in above way, or is there any other way to install the QTango on ubuntu 14.04(Other than compiling from the sources)?

Thanks & Regards