Re: 1984 Foretravel Charging System.
Reply #2 –
Converter/chargers and inverters from that era were fairly large (physically) and required cooling airflow, so they would be hard to hide. Look in every storage bay.
On your 40 year old coach, items like converter/charger and/or inverter might be original, or they may have been replaced by a previous owner.
The cases of electronic devices typically have a label with ID info. It may be difficult to see the label in confined mounting locations.
If you could get some photos of any "mysterious" devices you find, and post them here, we could help with identifying them.