Electronics
- 402
- Duncan's Amp Pages
- Resources for vacuum tubes. A data sheet data base for tubes. SPICE models for vacuum tubes, and software available for download.
- 403
- Frank's Electron Tube Pages
- Vacuum tube, vintage radio and other electronics information. Tube data sheets and pinout.
- 405
- RadioPistoia by Pierluigi
- Audio tube amplifier project. European tube number guide. Links to other tube sites. [English, Italian]
- 407
- Shortwave Transmitter Tubes
- A service from TDP with links to and information about the manufacturers, rebuilders and distributors/suppliers of tubes. An extensive list of data sheet sources.
- 411
- Voltage Drop Calculation
- Wire calculator based on voltage drop according to National Electrical Code.
- 413
- Sagantec
- The EDA solutions enable a dramatic shortcut in the implementation of custom, analog and mixed-signal circuits in new silicon technology.
- 414
- Xyalis
- Developer of a suite of IC layout finishing tools for 32bit and 64bit platforms. Includes product descriptions and screen snapshots.
- 415
- Specman and SystemVerilog blog
- A weblog for HVL (Specman - e and SystemVerilog) users, an extensive Specman tutorial and a verification methodology guide.