BA11-C Mounting Box - Revision history

Jnc: New cat

2023-07-11T01:11:17Z

New cat

← Older revision		Revision as of 01:11, 11 July 2023
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	The BA11's dimensions were 10-1/2" high, 19" wide, and 23" deep; the H720 was 8" high, 16-1/2" wide, and 6" deep, and weighed 30 lbs.		The BA11's dimensions were 10-1/2" high, 19" wide, and 23" deep; the H720 was 8" high, 16-1/2" wide, and 6" deep, and weighed 30 lbs.

	[[Category: DEC ~~Hardware~~]]		[[Category: DEC Mounting Boxes]]

Jnc: bold variant names

2022-01-23T13:53:16Z

bold variant names

← Older revision		Revision as of 13:53, 23 January 2022
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	The '''BA11-C Mounting Box''' was one of the two earliest earliest standard [[system unit]] [[backplane]] [[mounting box]]es produced by [[Digital Equipment Corporation\|DEC]], along with the [[BA11-E Mounting Box]]. It was used to hold the [[KA11 CPU\|KA11]] [[Central Processing Unit\|CPU]] and [[front console]] (programmer's console or 'controller console') for the [[PDP-11/20]] (hence the -C variant suffix).		The '''BA11-C Mounting Box''' was one of the two earliest earliest standard [[system unit]] [[backplane]] [[mounting box]]es produced by [[Digital Equipment Corporation\|DEC]], along with the [[BA11-E Mounting Box]]. It was used to hold the [[KA11 CPU\|KA11]] [[Central Processing Unit\|CPU]] and [[front console]] (programmer's console or 'controller console') for the [[PDP-11/20]] (hence the -C variant suffix).

	It came in two variants, the rack-mounted BA11-CS (including Tilt and Lock chassis slides), and the table-top BA11-CC. The rack-mounted ones were usually mounted in the [[H960 rack\|H960]] series of 19"-wide racks, which provided 63" of vertical mounting space, divided into units of 10-1/2". The 10-1/2" tall BA11-C mounting box was designed for these spaces.		It came in two variants, the rack-mounted '''BA11-CS''' (including Tilt and Lock chassis slides), and the table-top '''BA11-CC'''. The rack-mounted ones were usually mounted in the [[H960 rack\|H960]] series of 19"-wide racks, which provided 63" of vertical mounting space, divided into units of 10-1/2". The 10-1/2" tall BA11-C mounting box was designed for these spaces.

	The system units were mounted transversely, but because the cooling fans were mounted along the side of the box, they could not hold extended-length [[DEC card form factor\|hex]]-height cards; only shorter (lower) modules, such as the [[M920 UNIBUS Jumper]], could be placed in the [[DEC edge connector contact identification\|A-row connectors]].		The system units were mounted transversely, but because the cooling fans were mounted along the side of the box, they could not hold extended-length [[DEC card form factor\|hex]]-height cards; only shorter (sometimes called 'lower' - DEC location nomenclature assumed that the boards had their side edge at the top) modules, such as the [[M920 UNIBUS Jumper]], could be placed in the [[DEC edge connector contact identification\|A-row connectors]].

	The system units faced downward (unlike the later [[BA11 mounting boxes]], where they were facing up); the reason was probably to give easier access to the backplane wiring for [[debug]]ging. The unit could rotate to give easier access to the boards.		The system units faced downward (unlike the later [[BA11 mounting boxes]], where they were facing up); the reason was probably to give easier access to the backplane wiring for [[debug]]ging. The unit could rotate to give easier access to the boards.

Jnc: Update after -E created

2018-12-01T03:44:56Z

Update after -E created

← Older revision		Revision as of 03:44, 1 December 2018
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	The '''BA11 ~~mounting box~~''' was the ~~first of a series of [[DEC card form factor\|hex]]~~ [[system unit]] [[backplane]] ~~mounting boxes for the~~ [[~~H960 rack\|H960~~]] ~~series of 19"-wide racks~~ produced by [[Digital Equipment Corporation\|DEC]].		The '''BA11-C Mounting Box''' was one of the two earliest earliest standard [[system unit]] [[backplane]] [[mounting box]]es produced by [[Digital Equipment Corporation\|DEC]], along with the [[BA11-E Mounting Box]]. It was used to hold the [[KA11 CPU\|KA11]] [[Central Processing Unit\|CPU]] and [[front console]] (programmer's console or 'controller console') for the [[PDP-11/20]] (hence the -C variant suffix).

	The H960 racks provided 63" of vertical mounting space, divided into units of 10-1/2"~~, which were further subdividable into a pair of 5-1/4" spaces~~. The 10-1/2" tall BA11 mounting box was designed for these spaces.		It came in two variants, the rack-mounted BA11-CS (including Tilt and Lock chassis slides), and the table-top BA11-CC. The rack-mounted ones were usually mounted in the [[H960 rack\|H960]] series of 19"-wide racks, which provided 63" of vertical mounting space, divided into units of 10-1/2". The 10-1/2" tall BA11-C mounting box was designed for these spaces.

	~~Although they~~ were ~~intended to be rack-~~mounted, they ~~were available~~ in ~~table~~-~~top configuration as well~~.		The system units were mounted transversely, but because the cooling fans were mounted along the side of the box, they could not hold extended-length [[DEC card form factor\|hex]]-height cards; only shorter (lower) modules, such as the [[M920 UNIBUS Jumper]], could be placed in the [[DEC edge connector contact identification\|A-row connectors]].

	~~BA11's csme in both 'basic box' and 'expansion box' models; the former contained~~ the [[~~KA11 CPU\|KA11 processor~~]], ~~and had a programmer's console front panel, and~~ the ~~latter~~ was ~~used~~ to ~~hold extra [[core memory\|core]]~~ [[~~main memory~~]] ~~systems (each in their own custom system~~ unit~~) and other devices, and had a blank front panel~~.		The system units faced downward (unlike the later [[BA11 mounting boxes]], where they were facing up); the reason was probably to give easier access to the backplane wiring for [[debug]]ging. The unit could rotate to give easier access to the boards.

	The BA11 came with the [[H720 Power Supply]]~~. The supply~~ was mounted transversely in the box at the rear.		The BA11 came with the [[H720 Power Supply]]; it was mounted transversely in the box at the rear.

	The ~~system units were also mounted transversely, but because the cooling fans were mounted~~ along the side of ~~the box, they could not hold extended~~-~~length hex-height~~ cards~~; only shorter (lower) modules~~, ~~such as~~ the ~~[[M920 UNIBUS Jumper]], could be placed~~ in the ~~[[DEC edge connector contact identification\|A-row connectors]].~~		The [[power harness]] ran along the left-hand side; it contained a number of single-width stub cards, which plugged into the power supply slot in the system units (generally the A connector in slot 3).

	~~The~~ system units ~~faced downward~~ (~~unlike~~ the ~~later [[BA11 mounting boxes]], where they were facing up~~)~~; the reason was probably to give easier access to the backplane wiring for debugging. The unit could rotate to give easier access to the boards~~.

	The BA11's dimensions were 10-1/2" high, 19" wide, and 23" deep; the H720 was 8" high, 16-1/2" wide, and 6" deep, and weighed 30 lbs.		The BA11's dimensions were 10-1/2" high, 19" wide, and 23" deep; the H720 was 8" high, 16-1/2" wide, and 6" deep, and weighed 30 lbs.

	[[Category: DEC Hardware]]		[[Category: DEC Hardware]]

Jnc: Jnc moved page BA11 Mounting Box to BA11-C Mounting Box without leaving a redirect: Correct name

2018-12-01T03:18:57Z

Jnc moved page BA11 Mounting Box to BA11-C Mounting Box without leaving a redirect: Correct name

← Older revision		Revision as of 03:18, 1 December 2018
(No difference)

Jnc: +cat

2018-09-20T00:47:52Z

+cat

← Older revision		Revision as of 00:47, 20 September 2018
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	The BA11's dimensions were 10-1/2" high, 19" wide, and 23" deep; the H720 was 8" high, 16-1/2" wide, and 6" deep, and weighed 30 lbs.		The BA11's dimensions were 10-1/2" high, 19" wide, and 23" deep; the H720 was 8" high, 16-1/2" wide, and 6" deep, and weighed 30 lbs.

			[[Category: DEC Hardware]]

Jnc: Better link

2018-07-16T01:39:37Z

Better link

← Older revision		Revision as of 01:39, 16 July 2018
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	The BA11 came with the [[H720 Power Supply]]. The supply was mounted transversely in the box at the rear.		The BA11 came with the [[H720 Power Supply]]. The supply was mounted transversely in the box at the rear.

	The system units were also mounted transversely, but because the cooling fans were mounted along the side of the box, they could not hold extended-length hex-height cards; only shorter (lower) modules, such as the [[M920 UNIBUS Jumper]], could be placed in the [[DEC ~~card form factor~~\|A-row connectors]].		The system units were also mounted transversely, but because the cooling fans were mounted along the side of the box, they could not hold extended-length hex-height cards; only shorter (lower) modules, such as the [[M920 UNIBUS Jumper]], could be placed in the [[DEC edge connector contact identification\|A-row connectors]].

	The system units faced downward (unlike the later [[BA11 mounting boxes]], where they were facing up); the reason was probably to give easier access to the backplane wiring for debugging. The unit could rotate to give easier access to the boards.		The system units faced downward (unlike the later [[BA11 mounting boxes]], where they were facing up); the reason was probably to give easier access to the backplane wiring for debugging. The unit could rotate to give easier access to the boards.

	The BA11's dimensions were 10-1/2" high, 19" wide, and 23" deep; the H720 was 8" high, 16-1/2" wide, and 6" deep, and weighed 30 lbs.		The BA11's dimensions were 10-1/2" high, 19" wide, and 23" deep; the H720 was 8" high, 16-1/2" wide, and 6" deep, and weighed 30 lbs.

Jnc: Jnc moved page BA11 mounting box to BA11 Mounting Box: Caps per DEC docs

2018-07-12T13:19:35Z

Jnc moved page BA11 mounting box to BA11 Mounting Box: Caps per DEC docs

← Older revision		Revision as of 13:19, 12 July 2018
(No difference)

Jnc: Note board direction; fix tense

2017-10-30T11:31:16Z

Note board direction; fix tense

← Older revision		Revision as of 11:31, 30 October 2017
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	The '''BA11 mounting box''' was the first of a series of [[DEC card form factor\|hex]] [[system unit]] [[backplane]] mounting boxes for the [[H960 rack\|H960]] series of 19"-wide racks produced by [[Digital Equipment Corporation\|DEC~~]], the [[BA11 mounting boxes~~]].		The '''BA11 mounting box''' was the first of a series of [[DEC card form factor\|hex]] [[system unit]] [[backplane]] mounting boxes for the [[H960 rack\|H960]] series of 19"-wide racks produced by [[Digital Equipment Corporation\|DEC]].

	The H960 racks provided 63" of vertical mounting space, divided into units of 10-1/2", which were further subdividable into a pair of 5-1/4" spaces. The 10-1/2" tall BA11 mounting box was designed for these spaces.		The H960 racks provided 63" of vertical mounting space, divided into units of 10-1/2", which were further subdividable into a pair of 5-1/4" spaces. The 10-1/2" tall BA11 mounting box was designed for these spaces.
Line 5:		Line 5:
	Although they were intended to be rack-mounted, they were available in table-top configuration as well.		Although they were intended to be rack-mounted, they were available in table-top configuration as well.

	BA11's ~~come~~ in both 'basic box' and 'expansion box' models; the former ~~contains~~ the [[KA11 CPU\|KA11 processor]], and ~~has~~ a programmer's console front panel, and the latter is used to hold extra [[core memory\|core]] [[main memory]] systems (each in their own custom system unit) and other devices, and ~~has~~ a blank front panel.		BA11's csme in both 'basic box' and 'expansion box' models; the former contained the [[KA11 CPU\|KA11 processor]], and had a programmer's console front panel, and the latter was used to hold extra [[core memory\|core]] [[main memory]] systems (each in their own custom system unit) and other devices, and had a blank front panel.

	The BA11 came with the [[H720 Power Supply]]. The supply was mounted transversely at the rear ~~of the box~~.		The BA11 came with the [[H720 Power Supply]]. The supply was mounted transversely in the box at the rear.

	The system units were also mounted transversely, but because the cooling fans were mounted along the side of the box, it could not hold extended-length hex-height cards; only shorter (lower) modules, such as the [[M920 UNIBUS Jumper]], could be placed in the [[DEC card form factor\|A-row connectors]].		The system units were also mounted transversely, but because the cooling fans were mounted along the side of the box, they could not hold extended-length hex-height cards; only shorter (lower) modules, such as the [[M920 UNIBUS Jumper]], could be placed in the [[DEC card form factor\|A-row connectors]].

			The system units faced downward (unlike the later [[BA11 mounting boxes]], where they were facing up); the reason was probably to give easier access to the backplane wiring for debugging. The unit could rotate to give easier access to the boards.

	The BA11's dimensions were 10-1/2" high, 19" wide, and 23" deep; the H720 was 8" high, 16-1/2" wide, and 6" deep, and weighed 30 lbs.		The BA11's dimensions were 10-1/2" high, 19" wide, and 23" deep; the H720 was 8" high, 16-1/2" wide, and 6" deep, and weighed 30 lbs.

Jnc: Avoid redir

2017-10-29T23:33:19Z

Avoid redir

← Older revision		Revision as of 23:33, 29 October 2017
Line 1:		Line 1:
	The '''BA11 mounting box''' was the first of a series of [[DEC card form factor\|hex]] [[system unit]] [[backplane]] mounting boxes for the [[H960 rack\|H960]] series of 19"-wide racks produced by [[Digital Equipment Corporation\|DEC]], the [[BA11 mounting boxes]].		The '''BA11 mounting box''' was the first of a series of [[DEC card form factor\|hex]] [[system unit]] [[backplane]] mounting boxes for the [[H960 rack\|H960]] series of 19"-wide racks produced by [[Digital Equipment Corporation\|DEC]], the [[BA11 mounting boxes]].

			The H960 racks provided 63" of vertical mounting space, divided into units of 10-1/2", which were further subdividable into a pair of 5-1/4" spaces. The 10-1/2" tall BA11 mounting box was designed for these spaces.

	Although they were intended to be rack-mounted, they were available in table-top configuration as well.		Although they were intended to be rack-mounted, they were available in table-top configuration as well.

	The H960 racks provided 63" of vertical mounting space, divided into units of 10-1/2", which were further subdividable into a pair of 5-1/4" spaces. The 10-1/2" tall BA11 mounting box was designed for these spaces.		BA11's come in both 'basic box' and 'expansion box' models; the former contains the [[KA11 CPU\|KA11 processor]], and has a programmer's console front panel, and the latter is used to hold extra [[core memory\|core]] [[main memory]] systems (each in their own custom system unit) and other devices, and has a blank front panel.

	BA11's come in both 'basic box' and 'expansion box' models; the former contains the [[KA11 processor]], and has a programmer's console front panel, and the latter is used to hold extra [[core memory\|core]] [[main memory]] systems (each in their own custom system unit) and other devices, and has a blank front panel.

	The BA11 came with the [[H720 Power Supply]]. The supply was mounted transversely at the rear of the box.		The BA11 came with the [[H720 Power Supply]]. The supply was mounted transversely at the rear of the box.

Jnc: link back to series page, for people who get here by mistake

2017-10-29T18:30:47Z

link back to series page, for people who get here by mistake

← Older revision		Revision as of 18:30, 29 October 2017
Line 1:		Line 1:
	The '''BA11''' is the first of a series of [[DEC card form factor\|hex]] [[system unit]] [[backplane]] mounting boxes for the [[H960 rack\|H960]] series of 19"-wide racks produced by [[Digital Equipment Corporation\|DEC]]. Although they were intended to be rack-mounted, they were available in table-top configuration as well.		The '''BA11 mounting box''' was the first of a series of [[DEC card form factor\|hex]] [[system unit]] [[backplane]] mounting boxes for the [[H960 rack\|H960]] series of 19"-wide racks produced by [[Digital Equipment Corporation\|DEC]], the [[BA11 mounting boxes]].

			Although they were intended to be rack-mounted, they were available in table-top configuration as well.

	The H960 racks provided 63" of vertical mounting space, divided into units of 10-1/2", which were further subdividable into a pair of 5-1/4" spaces. The 10-1/2" tall BA11 mounting box was designed for these spaces.		The H960 racks provided 63" of vertical mounting space, divided into units of 10-1/2", which were further subdividable into a pair of 5-1/4" spaces. The 10-1/2" tall BA11 mounting box was designed for these spaces.