Bengt Nilsson - 2015-08-20

On Qucs "Example circuits" page, I found two nice device models, a vacuum triode and a pentode.
I would like to integrate them in my Qucs components selector, e.g. into "non-linear components".
The I could use them in my designs and simulate the behaviour.
Is this possible?
If so, where can I find instructions how to do it?

BN