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- Op-amps (741). Very thorough.
- Royal Device Underground 63cu.meter subwoofer horn-- 110dB at 1W!!
- Finn Hammer's 30" speaker.
- Lowther club
- Thomas Dunker's Horn page.
- Herbert Jeschke's Voigt pipe.
- Eeehaah's folded Voigt pipe.
- Horn theory.
- John B's speaker links.
- Bonavolta's TQWT.
- Audio Links (large!).
- More links.
- Class D amps (Ti.com).
- Ti class D amps
- Maxim xcvr apps.
- CS44210 Class D 50W amp. pdf samples
- IRCS8001
- Ham fests for region 3.
- Tube amps that I'm selling.
- speakers tube amps cool desktops I made (1024x768).
- Audio DSP programs for zero net phase shift filters, (audioexpress 5/01).
- Ionovac stuff from Roger Russell.
- Duncan's webpage of useful stuff, like tesla coils, tube audio, and more.
- AudioCircuit.com: a very large club for every kind of imaginable speaker (electrostat, ionic, magneto-planar, ...). Info comes from anyone who wants to contribute to the circuit.
- Tube Searcher. Very large w/ pdf's.
- Andrew's Audio Recommendations. LOTS of good advice on using and choosing audio equipment and companies.
- Pat's Schematics over 4000 available. Lots of interesting schematics, like a dual triode (5687 tube) really nice headphone amp.
- Vaccum Tubes, Inc. Many rare and antique tubes available, including sevral rare Arcturus blue glass tubes and the fancy 806 tube.
- Groove Tubes guitar tube supplier.
- Tube searcher to find data on vacuum tubes.
- Plasma Tweeters! - The most bizzare type of speakers with phenominal sound quality. Extremely clear and open sound; Perfect transient response; no Doppler distorion; extension to 60khz!....
- Vacuum tube amplifiers for sale! - 75 Watt mono-block amplifiers made by Allen Organ in the 1950's.
- Vacuum Tubes! A site by Claudio Bonavolta has loads of tube schematics, tube theory, circuits and audio info. Hundreds of links to other pages and companies.
- Tube data sheets from Duncan amps.
- Dynaco Mark III Schematic.
- Guitar amp stuff with schematics from many famous makers. Site by Andy Ruhl.
- Electrostatic Speaker pages. Step-by-step construction of home made ESLs.
