|
Title: Original R-389/390 Final Engineering Report Post by: Tom WA3KLR on January 01, 2005, 02:31:55 PM Happy new year! I was looking for some R-390A info for kicks and found a 106 page .pdf report called the Final Engineering Report by Collins' R&D Lab in 1953 for the Signal Corps. It provides a rare and very educational opportunity to get the nitty-gritty of an HF receiver's engineering (53 years later). AMfone - Dedicated to Amplitude Modulation on the Amateur Radio Bands
The site I found is http://www.r-389.com Collins R-389/URR VLF Receiver by Don Reaves W5OR. Perhaps the R-390 affectionatos already know of it. The .pdf report was scanned in by Bill Hawkins and Al Tirevold WA0HQQ in March 1999. The report is at http://www.r-389.com/engineeringreport.pdf It is 1.8 megabytes. Enjoy! |