| Digest Nr | Subject and Author |
|---|
 |
| 2024.09.18.01 | 60 Hz to 50 Hz Static Frequency Converter, from Spencer Chase |
| 2024.09.18.01 | 60 Hz to 50 Hz Static Frequency Converter, from Spencer Chase |
| 2017.04.06.01 | History of U.S. Standard Pitch, A = 440 Hz, from Grant Chapman, NY |
| 2015.10.21.01 | 415 Hz Tuning Fork, from David Kelzenberg |
| 2015.06.08.07 | Seek 50 Hz Motor for Ampico in Australia, from Roy Powlan |
| 2013.02.06.07 | 50/60 Hz Mains Frequency Converter, from Steve McCollum |
| 2013.02.06.06 | 50/60 Hz Mains Frequency Converter, from Eliyahu Shahar |
| 2013.02.04.09 | 50/60 Hz Mains Frequency Converter, from Nicholas Simons |
| 2013.02.04.08 | 50/60 Hz Mains Frequency Converter, from Phil Dayson |
| 2013.02.03.11 | 50/60 Hz Mains Frequency Converter, from Barrie Land |
| 2013.02.03.10 | 50/60 Hz Mains Frequency Converter, from Spencer Chase |
| 2013.02.01.07 | Seek 50/60 Hz Mains Frequency Converter, from Vincent Thebault |
| 2009.02.12.07 | Player Piano Motor for 40 Hz Mains Power, from Carl Zwanzig |
| 2000.11.23.03 | Wurlitzer Organ Pitch vs. 'A' 440 Hz, from Bill Finch |
| 1999.05.30.05 | Chein PianoLodeon on 50 Hz, from Mike Knudsen |
| 1998.11.08.09 | Solid State Strobotuner at 50 Hz, from Roberto Pistolesi |
| 1998.04.05.05 | History of U.S. Standard Pitch, A = 440 Hz, from Ed Gaida |
|
