Below are a just few of my favourite web sites in no particular order.
Audio Interest newsgroups
Tapeheads.net <– Everything for the tape recording enthusiast
Audiokarma.org <– Audio related forum with many articles
Audiogon <– Audiophile forum
CNet Audiophillic <– Audiophillac Blog from Steve Guttenburg
Parts and repair sites
Terry’s Rubber Rollers <– Custom made Pinch Rollers
Skywave Tape Deck Repair <– Chicago area tape deck service tech
Pacific Stereo <– West Coast Audio and Video service tech
Stereo Manuals <– Best source for reproduction Service Manuals
Mars Communications <– Excellent source for Belts
Dwojo Lights <– Need Fuse type lights, contact Dwojo
Parts Express <– Great store for Speaker Building, but a whole lot more for electronics, kits, parts, etc
Full Compass <– Great source for RTR tapes and Calibration tapes.. I use them all the time
US Recording Media <– Another excellent source for RTR tapes and supplies, I’ve used them too.
MCM Electronics <– another source for work bench tools, parts, test equipment, chemicals, include belts
Digikey <– need parts like Caps, Resistors for a repair or restoration, this company has a huge selection
Madisound <– Great selection of speakers for home built projects.
Audio Stores in Chicago area I’ve been impressed with
Saturday Audio Exchange <– New and vintage gear, really impressive to see, located just a tad north of downtown Chicago
Simply Stereo Hoffman Estates <– No website, but nice selection, definitely stop in if your in the area, located on Higgins Rd
Rainbow Records <– Again no website, but a great record store in Barrington, IL off of Northwest Hwy
There’s probably a ton more, that off the top of my head I can’t remember, but I’ll add more as time goes by. Feel free to send comments or suggestions