The Holtkamp Organ: A Photo Tour of the Organ
Part 5 of 6: The Positiv (manual 1, electro-pneumatic pitman chest)
The Positiv division is unenclosed. When enclosed this division is called the Choir division.
Reed Pipe
This pipe is a lot like a single-reed orchestral instrument. The wind flowing through the pipe vibrates a metal tongue, a strip of flat metal, against an open-faced shallot. This is not visible from the outside because these parts are contained in the boot, the bottom part of the pipe which rests on the wind chest. The sound is amplified by the resonator, the top, flared part of the pipe. Pitch is determined by the length of the tongue. They have a strong, penetrating tone. For a diagram, see "Sound Characteristics of Stops."
Photos of The Positiv: 1 | 2 | 3 | 4 | 5 | 6
| 8' |
Copula |
61 pipes |
| 4' |
Preæstant |
61 pipes |
| 4' |
Rohrflöte |
61 pipes |
| 2 ⅔' |
Nazard |
61 pipes |
| 2' |
Octava |
61 pipes |
| 2' |
Blockflöte |
61 pipes |
| 1 ⅗' |
Tierce |
61 pipes |
| |
Fourniture III |
183 pipes |
| 8' |
Cromorne |
61 pipes |
| |
Zimbelstern |
(added at a later date) |
| |
Blank |
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Continue to Part 6: The Reservoir
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Organ Photo Tour
Important Links
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