The 21st Century R-390A/URR Technical Reverence
It occurred to me that there might be some interest in the Very best technical reference available for the R390A/URR. This was a project that started in the late 1990's it's aim was to compile the best technical service information available. This manual is based on the 1985 Navy TM on the R390A which is the last and the best one it was then expanded to includes input from the the many technical experts on this receiver. It was published in the year 2000. It is a 309 page last word on the R390A. Best of all it is a free download.
Enjoy: http://hilltoparmyradios.com/1948_R390A-Y2K-Release-1.PDF
It occurred to me that there might be some interest in the Very best technical reference available for the R390A/URR. This was a project that started in the late 1990's it's aim was to compile the best technical service information available. This manual is based on the 1985 Navy TM on the R390A which is the last and the best one it was then expanded to includes input from the the many technical experts on this receiver. It was published in the year 2000. It is a 309 page last word on the R390A. Best of all it is a free download.
Enjoy: http://hilltoparmyradios.com/1948_R390A-Y2K-Release-1.PDF