Wurlitzer Chest Repetition Speeds - Revision history

GabrielPeressini at 21:47, 16 September 2025

2025-09-16T21:47:44Z

← Older revision		Revision as of 21:47, 16 September 2025
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	The following is a letter which first appeared in the March/April 1984 issue of ''Theatre Organ''.<ref>''Theatre Organ''. American Theatre Organ Society. Vol. 26, no. 2, January/February 1984, p. 53. [https://www.atos.org/journal/issue/26/2]</ref>		The following is a letter which first appeared in the March/April 1984 issue of ''Theatre Organ'' by Judd Walton of Vallejo, California.<ref>''Theatre Organ''. American Theatre Organ Society. Vol. 26, no. 2, January/February 1984, p. 53. [https://www.atos.org/journal/issue/26/2]</ref>

GabrielPeressini: /* Summary */

2025-09-16T21:47:11Z

Summary

← Older revision		Revision as of 21:47, 16 September 2025
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	\| style="text-align:right;" \| <span id="pointC">(c)</span> 17.5		\| style="text-align:right;" \| <span id="pointC">(c)</span> 17.5
	\|}		\|}

	~~Judd Walton Vallejo, California~~

	== References ==		== References ==
	<references />		<references />

GabrielPeressini: /* Summary */

2025-09-16T21:46:35Z

Summary

← Older revision		Revision as of 21:46, 16 September 2025
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	==Summary==		==Summary==
	The fastest reiterating speed obtained by the pipe pallet valve in the chest, figure ([[#pointA\|A]]) on the chart, was 1150 cy/min (19.2 cy/sec). This was obtained by bypassing the relay with electrical input directly to the chest magnet. Zephyr skin was used on the primary and secondary pneumatics, with travel adjustments as noted.		The fastest reiterating speed obtained by the pipe pallet valve in the chest, figure ([[#pointA\|a]]) on the chart, was 1150 cy/min (19.2 cy/sec). This was obtained by bypassing the relay with electrical input directly to the chest magnet. Zephyr skin was used on the primary and secondary pneumatics, with travel adjustments as noted.
	The fastest reiterating speed using brown leather on the pneumatics was figure ([[#pointB\|b]]) on the chart, i.e., 1050 cy/min (17.5 cy/sec). This finding definitely proves that Zephyr skin-covered pneumatics are faster. However, the time elapse difference is minimal, i.e., 1.5 cy/sec.		The fastest reiterating speed using brown leather on the pneumatics was figure ([[#pointB\|b]]) on the chart, i.e., 1050 cy/min (17.5 cy/sec). This finding definitely proves that Zephyr skin-covered pneumatics are faster. However, the time elapse difference is minimal, i.e., 1.5 cy/sec.
	Including the relay in the circuit produced the results as shown at figures ([[#pointC\|c]]) and ([[#pointD\|d]]). The time elapse difference is now much more significant, i.e., 4.2 cy/sec. This greater differ- ence reflects the operation time of the relay pneumatics and travel adjustments. It should also be noted that a combination of Zephyr and Brown leather in the pneumatic circuit increased the speed somewhat over that obtained using only Brown leather.		Including the relay in the circuit produced the results as shown at figures ([[#pointC\|c]]) and ([[#pointD\|d]]). The time elapse difference is now much more significant, i.e., 4.2 cy/sec. This greater differ- ence reflects the operation time of the relay pneumatics and travel adjustments. It should also be noted that a combination of Zephyr and Brown leather in the pneumatic circuit increased the speed somewhat over that obtained using only Brown leather.

GabrielPeressini: /* Summary */

2025-09-16T21:46:23Z

Summary

← Older revision		Revision as of 21:46, 16 September 2025
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	==Summary==		==Summary==
	The fastest reiterating speed obtained by the pipe pallet valve in the chest, figure (a) on the chart, was 1150 cy/min (19.2 cy/sec). This was obtained by bypassing the relay with electrical input directly to the chest magnet. Zephyr skin was used on the primary and secondary pneumatics, with travel adjustments as noted.		The fastest reiterating speed obtained by the pipe pallet valve in the chest, figure ([[#pointA\|A]]) on the chart, was 1150 cy/min (19.2 cy/sec). This was obtained by bypassing the relay with electrical input directly to the chest magnet. Zephyr skin was used on the primary and secondary pneumatics, with travel adjustments as noted.
	The fastest reiterating speed using brown leather on the pneumatics was figure (b) on the chart, i.e., 1050 cy/min (17.5 cy/sec). This finding definitely proves that Zephyr skin-covered pneumatics are faster. However, the time elapse difference is minimal, i.e., 1.5 cy/sec.		The fastest reiterating speed using brown leather on the pneumatics was figure ([[#pointB\|b]]) on the chart, i.e., 1050 cy/min (17.5 cy/sec). This finding definitely proves that Zephyr skin-covered pneumatics are faster. However, the time elapse difference is minimal, i.e., 1.5 cy/sec.
	Including the relay in the circuit produced the results as shown at figures ([[#pointC\|c]]) and ([[#pointD\|d]]). The time elapse difference is now much more significant, i.e., 4.2 cy/sec. This greater differ- ence reflects the operation time of the relay pneumatics and travel adjustments. It should also be noted that a combination of Zephyr and Brown leather in the pneumatic circuit increased the speed somewhat over that obtained using only Brown leather.		Including the relay in the circuit produced the results as shown at figures ([[#pointC\|c]]) and ([[#pointD\|d]]). The time elapse difference is now much more significant, i.e., 4.2 cy/sec. This greater differ- ence reflects the operation time of the relay pneumatics and travel adjustments. It should also be noted that a combination of Zephyr and Brown leather in the pneumatic circuit increased the speed somewhat over that obtained using only Brown leather.
	The question raised by the above-listed findings would naturally be the apparent result to an organist. With the assistance of Mr. Gordon Kibbee, noted organist and organ consultant, it was determined by tests he made that a manual key could be played at a Speed of 20 cy/sec, which extends to 1200 cy/min. This figure was obtained using two fingers, one on each hand, striking the same key. Using one finger only, the result was between 16 and 17 cy/sec. The differ- ences between the above and the relay/chest action results indicate a loose relationship between the demands of a competent organist and he response of the organ action.		The question raised by the above-listed findings would naturally be the apparent result to an organist. With the assistance of Mr. Gordon Kibbee, noted organist and organ consultant, it was determined by tests he made that a manual key could be played at a Speed of 20 cy/sec, which extends to 1200 cy/min. This figure was obtained using two fingers, one on each hand, striking the same key. Using one finger only, the result was between 16 and 17 cy/sec. The differ- ences between the above and the relay/chest action results indicate a loose relationship between the demands of a competent organist and he response of the organ action.

GabrielPeressini: /* Summary */

2025-09-16T21:45:44Z

Summary

← Older revision		Revision as of 21:45, 16 September 2025
Line 29:		Line 29:
	The fastest reiterating speed obtained by the pipe pallet valve in the chest, figure (a) on the chart, was 1150 cy/min (19.2 cy/sec). This was obtained by bypassing the relay with electrical input directly to the chest magnet. Zephyr skin was used on the primary and secondary pneumatics, with travel adjustments as noted.		The fastest reiterating speed obtained by the pipe pallet valve in the chest, figure (a) on the chart, was 1150 cy/min (19.2 cy/sec). This was obtained by bypassing the relay with electrical input directly to the chest magnet. Zephyr skin was used on the primary and secondary pneumatics, with travel adjustments as noted.
	The fastest reiterating speed using brown leather on the pneumatics was figure (b) on the chart, i.e., 1050 cy/min (17.5 cy/sec). This finding definitely proves that Zephyr skin-covered pneumatics are faster. However, the time elapse difference is minimal, i.e., 1.5 cy/sec.		The fastest reiterating speed using brown leather on the pneumatics was figure (b) on the chart, i.e., 1050 cy/min (17.5 cy/sec). This finding definitely proves that Zephyr skin-covered pneumatics are faster. However, the time elapse difference is minimal, i.e., 1.5 cy/sec.
	Including the relay in the circuit produced the results as shown at figures ([[#~~PointC~~\|c]]) and ([[#~~PointD~~\|d]]). The time elapse difference is now much more significant, i.e., 4.2 cy/sec. This greater differ- ence reflects the operation time of the relay pneumatics and travel adjustments. It should also be noted that a combination of Zephyr and Brown leather in the pneumatic circuit increased the speed somewhat over that obtained using only Brown leather.		Including the relay in the circuit produced the results as shown at figures ([[#pointC\|c]]) and ([[#pointD\|d]]). The time elapse difference is now much more significant, i.e., 4.2 cy/sec. This greater differ- ence reflects the operation time of the relay pneumatics and travel adjustments. It should also be noted that a combination of Zephyr and Brown leather in the pneumatic circuit increased the speed somewhat over that obtained using only Brown leather.
	The question raised by the above-listed findings would naturally be the apparent result to an organist. With the assistance of Mr. Gordon Kibbee, noted organist and organ consultant, it was determined by tests he made that a manual key could be played at a Speed of 20 cy/sec, which extends to 1200 cy/min. This figure was obtained using two fingers, one on each hand, striking the same key. Using one finger only, the result was between 16 and 17 cy/sec. The differ- ences between the above and the relay/chest action results indicate a loose relationship between the demands of a competent organist and he response of the organ action.		The question raised by the above-listed findings would naturally be the apparent result to an organist. With the assistance of Mr. Gordon Kibbee, noted organist and organ consultant, it was determined by tests he made that a manual key could be played at a Speed of 20 cy/sec, which extends to 1200 cy/min. This figure was obtained using two fingers, one on each hand, striking the same key. Using one finger only, the result was between 16 and 17 cy/sec. The differ- ences between the above and the relay/chest action results indicate a loose relationship between the demands of a competent organist and he response of the organ action.

GabrielPeressini: /* Summary */

2025-09-16T21:44:53Z

Summary

← Older revision		Revision as of 21:44, 16 September 2025
Line 29:		Line 29:
	The fastest reiterating speed obtained by the pipe pallet valve in the chest, figure (a) on the chart, was 1150 cy/min (19.2 cy/sec). This was obtained by bypassing the relay with electrical input directly to the chest magnet. Zephyr skin was used on the primary and secondary pneumatics, with travel adjustments as noted.		The fastest reiterating speed obtained by the pipe pallet valve in the chest, figure (a) on the chart, was 1150 cy/min (19.2 cy/sec). This was obtained by bypassing the relay with electrical input directly to the chest magnet. Zephyr skin was used on the primary and secondary pneumatics, with travel adjustments as noted.
	The fastest reiterating speed using brown leather on the pneumatics was figure (b) on the chart, i.e., 1050 cy/min (17.5 cy/sec). This finding definitely proves that Zephyr skin-covered pneumatics are faster. However, the time elapse difference is minimal, i.e., 1.5 cy/sec.		The fastest reiterating speed using brown leather on the pneumatics was figure (b) on the chart, i.e., 1050 cy/min (17.5 cy/sec). This finding definitely proves that Zephyr skin-covered pneumatics are faster. However, the time elapse difference is minimal, i.e., 1.5 cy/sec.
	Including the relay in the circuit produced the results as shown at figures (c) and (d). The time elapse difference is now much more significant, i.e., 4.2 cy/sec. This greater differ- ence reflects the operation time of the relay pneumatics and travel adjustments. It should also be noted that a combination of Zephyr and Brown leather in the pneumatic circuit increased the speed somewhat over that obtained using only Brown leather.		Including the relay in the circuit produced the results as shown at figures ([[#PointC\|c]]) and ([[#PointD\|d]]). The time elapse difference is now much more significant, i.e., 4.2 cy/sec. This greater differ- ence reflects the operation time of the relay pneumatics and travel adjustments. It should also be noted that a combination of Zephyr and Brown leather in the pneumatic circuit increased the speed somewhat over that obtained using only Brown leather.
	The question raised by the above-listed findings would naturally be the apparent result to an organist. With the assistance of Mr. Gordon Kibbee, noted organist and organ consultant, it was determined by tests he made that a manual key could be played at a Speed of 20 cy/sec, which extends to 1200 cy/min. This figure was obtained using two fingers, one on each hand, striking the same key. Using one finger only, the result was between 16 and 17 cy/sec. The differ- ences between the above and the relay/chest action results indicate a loose relationship between the demands of a competent organist and he response of the organ action.		The question raised by the above-listed findings would naturally be the apparent result to an organist. With the assistance of Mr. Gordon Kibbee, noted organist and organ consultant, it was determined by tests he made that a manual key could be played at a Speed of 20 cy/sec, which extends to 1200 cy/min. This figure was obtained using two fingers, one on each hand, striking the same key. Using one finger only, the result was between 16 and 17 cy/sec. The differ- ences between the above and the relay/chest action results indicate a loose relationship between the demands of a competent organist and he response of the organ action.

GabrielPeressini: /* Summary */

2025-09-16T21:43:43Z

Summary

← Older revision		Revision as of 21:43, 16 September 2025
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	\| colspan="2" style="font-style:italic;" \| Relay By-passed		\| colspan="2" style="font-style:italic;" \| Relay By-passed
	\| 790		\| 790
	\| style="text-align:right;" \| (b) 13.1		\| style="text-align:right;" \| <span id="pointB">(b)</Span> 13.1
	\|-		\|-
	\| Br. L		\| Br. L
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	\| colspan="2" \| "		\| colspan="2" \| "
	\| 1150		\| 1150
	\| style="text-align:right;" \| (a) 19.2		\| style="text-align:right;" \| <span id="pointA">(a)</Span> 19.2
	\|-		\|-
	\| Br. L		\| Br. L
Line 127:		Line 127:
	\| Br. L		\| Br. L
	\| 800		\| 800
	\| style="text-align:right;" \| (d) 13.3		\| style="text-align:right;" \| <span id="pointD">(d)</span> 13.3
	\|-		\|-
	\| Br. L		\| Br. L
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	\| Zephyr		\| Zephyr
	\| 1050		\| 1050
	\| style="text-align:right;" \| (c) 17.5		\| style="text-align:right;" \| <span id="pointC">(c)</span> 17.5
	\|}		\|}

GabrielPeressini at 21:40, 16 September 2025

2025-09-16T21:40:28Z

← Older revision		Revision as of 21:40, 16 September 2025
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	The equipment used was:		The equipment used was:
	# ~~(1)~~ Strobotac stroboscopic tachometer used to measure speed without drag on the action;		# Strobotac stroboscopic tachometer used to measure speed without drag on the action;
	#~~(2)~~ Stewart-Warner magnetic speed indicator;		# Stewart-Warner magnetic speed indicator;
	#~~(3)~~ Veeder counter used for checking;		# Veeder counter used for checking;
	#~~(4)~~ Facsimile of a Wurlitzer relay and chest built to scale by Roy from measurements taken from his residence-installed Wurlitzer, Style 260, Opus 1173, originally installed in the Newman Theatre, Kansas City, Missouri; and		# Facsimile of a Wurlitzer relay and chest built to scale by Roy from measurements taken from his residence-installed Wurlitzer, Style 260, Opus 1173, originally installed in the Newman Theatre, Kansas City, Missouri; and
	#~~(5) a~~ Wurlitzer Open Diapason pipe, G# number 33 on the 8' scale. It was chosen being near the middle of the compass and for its promptness of speed, a middle-of-the-road choice.		# A Wurlitzer Open Diapason pipe, G# number 33 on the 8' scale. It was chosen being near the middle of the compass and for its promptness of speed, a middle-of-the-road choice.

	Wind was supplied to the facsimile relay and chest at 10" pressure from he organ blower, a 10-hp Orgoblo. Temperature was controlled at 68° Fahrenheit. Very thin Brown leather		Wind was supplied to the facsimile relay and chest at 10" pressure from he organ blower, a 10-hp Orgoblo. Temperature was controlled at 68° Fahrenheit. Very thin Brown leather
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	The following input was important to the test results:		The following input was important to the test results:
	~~(1)~~ Relay contact bar was set to travel ¹⁄₁₆" (¹⁄₃₂" open, ¹⁄₃₂" closed);		# Relay contact bar was set to travel ¹⁄₁₆" (¹⁄₃₂" open, ¹⁄₃₂" closed);
	~~(2)~~ Slack in the secondary chest pneumatic was made by cutting the flex material oversize to allow for ⁷⁄₆₄" travel of the striker felt before it hit the valve arm spoon; and ~~(3)~~ Magnetic travel of the magnet armature was set at ¹⁄₃₂" using a Wurlitzer Brass Plug magnet.		# Slack in the secondary chest pneumatic was made by cutting the flex material oversize to allow for ⁷⁄₆₄" travel of the striker felt before it hit the valve arm spoon; and
			# Magnetic travel of the magnet armature was set at ¹⁄₃₂" using a Wurlitzer Brass Plug magnet.

	==Observations==		==Observations==

GabrielPeressini at 21:39, 16 September 2025

2025-09-16T21:39:12Z

← Older revision		Revision as of 21:39, 16 September 2025
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	The equipment used was:		The equipment used was:
	#(1) Strobotac stroboscopic tachometer used to measure speed without drag on the action;		# (1) Strobotac stroboscopic tachometer used to measure speed without drag on the action;
	#(2) Stewart-Warner magnetic speed indicator;		#(2) Stewart-Warner magnetic speed indicator;
	#(3) Veeder counter used for checking;		#(3) Veeder counter used for checking;

GabrielPeressini at 21:39, 16 September 2025

2025-09-16T21:39:02Z

← Older revision		Revision as of 21:39, 16 September 2025
Line 6:		Line 6:

	The equipment used was:		The equipment used was:
	(1) Strobotac stroboscopic tachometer used to measure speed without drag on the action;		#(1) Strobotac stroboscopic tachometer used to measure speed without drag on the action;
	(2) Stewart-Warner magnetic speed indicator;		#(2) Stewart-Warner magnetic speed indicator;
	(3) Veeder counter used for checking;		#(3) Veeder counter used for checking;
	(4) Facsimile of a Wurlitzer relay and chest built to scale by Roy from measurements taken from his residence-installed Wurlitzer, Style 260, Opus 1173, originally installed in the Newman Theatre, Kansas City, Missouri; and		#(4) Facsimile of a Wurlitzer relay and chest built to scale by Roy from measurements taken from his residence-installed Wurlitzer, Style 260, Opus 1173, originally installed in the Newman Theatre, Kansas City, Missouri; and
	(5) a Wurlitzer Open Diapason pipe, G# number 33 on the 8' scale. It was chosen being near the middle of the compass and for its promptness of speed, a middle-of-the-road choice.		#(5) a Wurlitzer Open Diapason pipe, G# number 33 on the 8' scale. It was chosen being near the middle of the compass and for its promptness of speed, a middle-of-the-road choice.

	Wind was supplied to the facsimile relay and chest at 10" pressure from he organ blower, a 10-hp Orgoblo. Temperature was controlled at 68° Fahrenheit. Very thin Brown leather		Wind was supplied to the facsimile relay and chest at 10" pressure from he organ blower, a 10-hp Orgoblo. Temperature was controlled at 68° Fahrenheit. Very thin Brown leather