Many thanks to all! It was a very nice and fruitful meeting!
Our V594 Cas observation (between clouds...):
It seems a P-cygni profile!
Robin, that is the Yaesu VR-5000, a multi-band receiver I use to detect meteor events with forward-scattering technique (may be you are also an ham radio?). On the nearby notebook runs Spectrum Lab, a software that analizes low-frequency signal and creates spectrograms like this (related to a modest fireball):
All the best!
Paolo