| 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 |
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