For a long time, the Electronic Warfare and Radar Systems Handbook has been a staple resource for RF engineers. Until a year or so ago, it was possible to download it from the following URL:
Suddenly it was gone, and all the hundreds (maybe thousands) of links to it from other websites did not work any more. A near panic set in. Fortunately, I had a saved copy of it that I recently went back and restored. There are a couple other websites that are making it available, which is completely legitimate since there is a notice on the cover that distribution privileges are unlimited.
The PDF file is a little over 3 MB. I plan to eventually convert it to HTML format. Click on the cover image below to download.