I did a teardown of a mobile network GSM Ericsson RBS 2216 900 MHz base station. Including a 14 minute description of the amplifier itself.
All pictures / description and video at:
Re: Ericsson RBS 2216 900 MHz base station teardown Mads Barnkob, Thu Jun 07 2018, 08:53PM
I have now, only 2 years later, done a video on the auxiliary power units that came with this GSM system. They had hidden themselves away pretty good :)