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The entire manual can be obtained by simply downloading the single pdf file. To use the pdf file you will need the free Adobe Acrobat reader. It can be downloaded from various sites, including the home site at http://www.adobe.com If you prefer, you may open the "pages" folder and download the gif or jpg images of the pages, one at a time. You will need a graphics program or a document viewer such as Doc_View to view and print the jpg and gif files.
National Universal SW-3 manual. Compliments of Steve Johnston, WD8DAS. National DC SW-3 schematic. Compliments of Bob Mattson, W2AMI.