I didn't read the article so I don't know if it is wrong or you are simply confused, but you cannot lose
PR by having out going links. What you may be confused about is that the amount of
PR that is passed from your page to any other page, in really simple terms, is the page's
PR divided by the number of out going links.
Your page
PR never changes as a result of these links. But here is one consideration and that might be what the article is saying. Your home page also passes
PR to all your internal pages it links to. So if you have a lot of outgoing links from your home page you are reducing the amount of
PR that it is passing to all your internal pages.
Now some people get paranoid about this. I think that is stupid. Just put up the outbound links that seem reasonable and sensible and don't worry about the impact on the
PR of your internal pages.