Learradio AMR-1 LF receiver/AMT-1 transmitter

I have a Learradio AMR-1 receiver and a Learradio AMT-1 transmitter that were installed in a light aircraft owned by my father in the mid 1950s. I would like to restore both units to their original condition but can find no information on either one. I am also considering replacing the vacuum tubes with solid state devices while keeping both units looking like they originally did both internally and externally. This would also save on the cost of 90 volt batteries which were their original high voltage source!

Thanks for your help.

Welcome to TRF!

WC