World Tube Audio Portal
Both these sites have like a a bajillion megabytes to download and they'll definitely make having a broadband connection worthwhile.
Radiotron Designers Handbook 4th Edition
Pete Millett's Tube Amplifier Library
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an indispensable resource if you're planning an auto holiday in the USA: tesg's guide to big chain road food consumption
One of Chicago's hidden tourist attractions.. and free, to boot.. is its enormous railway facilities, by far the world's largest, handling over 35,000 carloads (or if you're European, carriageloads) of cargo per day, on top of hundreds of suburban and intercity passenger train movements. Things aren't the quite same as the days when you could spot the 20th Century and Broadway Limited at Englewood, but this Trains Magazine page , The Chicago Railran Site, and the Chicago Rail Junctions site all give a list of places for trainspotters to get their jollies, including Brighton Park Junction (80 trains a day, is that enough?), although none include (because of lack of public viewing points, I suspect) my favorite, BNSF Corwith Yards, at the time it was built, (1889) the world's largest railway frieght yard (and still plenty busy today).
