I collect military vacuum tube radio receivers such as the R-220, R-389, R-390( ), R-391, R-392, and R-725 and have several of each and use them for listening to radio traffic throughout the RF spectrum. I also possess three military LTV receivers that cover the UHF and microwave frequencies that give me unlimited reception capabilities.
Am looking for training and maintenance publication for such receivers from all services.
Am looking for training and maintenance publication for such receivers from all services.