| Digest Nr | Subject and Author |
|---|
 |
| 2024.02.21.01 | Ampico A "Second Amplifier", from Bob Garner |
| 2008.05.12.04 | Portable Amplifier for Music Box Demonstrations, from Tom Sendall |
| 2008.05.05.01 | Portable Amplifier for Music Box Demonstrations, from Mike Knudsen |
| 2008.05.02.01 | Portable Amplifier for Music Box Demonstrations, from Ingmar Krause |
| 2008.04.30.01 | Portable Amplifier for Music Box Demonstrations, from Marvin Polan |
| 2008.04.28.06 | Portable Amplifier for Music Box Demonstrations, from Nicholas Simons |
| 2008.04.28.05 | Portable Amplifier for Music Box Demonstrations, from David Evans |
| 2008.04.28.04 | Portable Amplifier for Music Box Demonstrations, from Jim Katz |
| 2008.04.28.03 | Portable Amplifier for Music Box Demonstrations, from Larry Norman |
| 2008.04.27.02 | Portable Amplifier for Music Box Demonstrations, from Jody Kravitz |
| 2008.04.27.01 | Portable Amplifier for Music Box Demonstrations, from Tom Sendall |
| 2006.05.18.04 | Auxetophone Pneumatic Amplifier, from Bob Baumbach |
| 2006.05.17.07 | Auxetophone Pneumatic Amplifier, from Ted Bowman |
| 2006.05.17.06 | Auxetophone Pneumatic Amplifier, from Jeffrey Borinsky |
| 2006.05.16.04 | Auxetophone Pneumatic Amplifier, from Jeffrey Borinsky |
| 2006.05.13.01 | Auxetophone Pneumatic Amplifier, from Mark Kinsler |
| 1998.01.16.13 | Model "A" Ampico Amplifier Box, from Bruce Clark |
| 1997.07.01.08 | Hammond "VibraChord" Amplifier, from Craig Brougher |
| 1997.06.30.07 | Seek Vibraharp Amplifier, from Craig Brougher |
|
