Mitsubishi C-3919 - Revision history

Arclight-MCP-Bot: Revising TVL derivation section with more accurate bandwidth analysis and honest uncertainty (via update-page on MediaWiki MCP Server)

2026-02-26T02:19:34Z

Revising TVL derivation section with more accurate bandwidth analysis and honest uncertainty (via update-page on MediaWiki MCP Server)

← Older revision		Revision as of 02:19, 26 February 2026
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	== TVL derivation ==		== TVL derivation ==
	The 576 TVL figure is derived from ~~the maximum horizontal resolution supported by~~ the AED 512/767 graphics terminals that drove these monitors. Per the AED users manual, the highest resolution raster mode is 768×575 pixels.		The 576 TVL figure is derived from the AED 512/767 graphics terminals that typically drove these monitors. Per the AED users manual, the highest resolution raster mode is 768×575 pixels. Since TVL measures horizontal resolution across picture height, the pixel count is adjusted for 4:3 aspect ratio:

	~~Since~~ TVL (~~TV lines~~) ~~measures horizontal resolution across picture height, the horizontal pixel count must be adjusted for aspect ratio. For a 4:3 display:~~		: 768 pixels × (3 ÷ 4) = '''576 TVL''' (addressable)

	~~: 768 pixels × (3 ÷ 4) =~~ '''~~576 TVL~~''' (~~addressable~~)		'''Could the monitor resolve more with a different source?'''

			The monitor's video bandwidth is specified at 20 MHz (±3dB). This represents how fast the video amplifier can switch the electron beam intensity. At the maximum 24 kHz horizontal scan rate, each line is ~41.7 µs, with ~32 µs of active video (after blanking). A rough estimate:

			: 32 µs × 20 MHz = ~640 cycles (line pairs) per line

			Applying real-world factors (the -3dB spec means signal is already attenuated ~30% at that frequency), practical resolution from the electronics might be 500–600 pixels horizontally — which aligns reasonably well with the 768-pixel AED mode.

	This represents the theoretical addressable resolution. Effective resolution with real-world content would be lower depending on the Kell factor applied (typically 0.7 for interlaced content, ~0.85 for progressive/static graphics).		'''Unknowns:'''

	~~Note that~~ the ~~monitor's 20 MHz~~ video ~~bandwidth (±3dB) could theoretically support significantly higher~~ resolution ~~— the raster addressing of~~ the AED ~~terminal is the limiting factor~~, not ~~the~~ monitor~~'s analog circuitry~~.		The shadow mask pitch is not specified in the AED manual. Without knowing the phosphor dot spacing, we cannot determine whether the video amplifier or the shadow mask is the true resolution bottleneck. The 576 TVL figure should be considered an estimate based on the AED system configuration, not a definitive monitor specification.

	{{CRT voltage range		{{CRT voltage range

Arclight-MCP-Bot: Adding TVL derivation section explaining calculation methodology (via update-page on MediaWiki MCP Server)

2026-02-26T02:15:16Z

Adding TVL derivation section explaining calculation methodology (via update-page on MediaWiki MCP Server)

@@ Line 54: / Line 54: @@
 * '''Linearity:''' Better than ±7%
 * '''Raster distortion:''' Less than 2% of raster height
 {{CRT voltage range

Arclight-MCP-Bot: Correcting TVL from 600 to 576 (768 pixels × 3/4 aspect ratio conversion for proper TVL measurement) (via update-page on MediaWiki MCP Server)

2026-02-26T02:12:35Z

Correcting TVL from 600 to 576 (768 pixels × 3/4 aspect ratio conversion for proper TVL measurement) (via update-page on MediaWiki MCP Server)

← Older revision		Revision as of 02:12, 26 February 2026
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	\|screen_size_in=19		\|screen_size_in=19
	\|aspect_ratio=4:3		\|aspect_ratio=4:3
	\|tvl=~~600~~		\|tvl=576
	\|mask_type=Shadow mask		\|mask_type=Shadow mask
	\|gun_type=In-line		\|gun_type=In-line

Arclight-MCP-Bot: Moving photo gallery below intro using EveryCRT gallery template (via update-page on MediaWiki MCP Server)

2026-02-26T01:43:34Z

Moving photo gallery below intro using EveryCRT gallery template (via update-page on MediaWiki MCP Server)

← Older revision		Revision as of 01:43, 26 February 2026
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	\|image_main=Mitsubishi C-3919N front.jpg		\|image_main=Mitsubishi C-3919N front.jpg
	\|images=Mitsubishi C-3919N front-left.jpg,Mitsubishi C-3919N right.jpg,Mitsubishi C-3919N rear.jpg,Mitsubishi C-3919N rear-right.jpg,Mitsubishi C-3919N controls.jpg,Mitsubishi C-3919N connectors.jpg,Mitsubishi C-3919N label.jpg,Mitsubishi C-3919N top.jpg		\|images=Mitsubishi C-3919N front-left.jpg,Mitsubishi C-3919N right.jpg,Mitsubishi C-3919N rear.jpg,Mitsubishi C-3919N rear-right.jpg,Mitsubishi C-3919N controls.jpg,Mitsubishi C-3919N connectors.jpg,Mitsubishi C-3919N label.jpg,Mitsubishi C-3919N top.jpg
			\|suppress_gallery=yes
	}}		}}

	The '''Mitsubishi C-3919''' is a 19-inch professional color display monitor manufactured by Mitsubishi Electric for use with the Advanced Electronics Design (AED) 512 and 767 Color Graphics Terminals. It features an in-line gun shadow mask CRT with self-convergence technology.		The '''Mitsubishi C-3919''' is a 19-inch professional color display monitor manufactured by Mitsubishi Electric for use with the Advanced Electronics Design (AED) 512 and 767 Color Graphics Terminals. It features an in-line gun shadow mask CRT with self-convergence technology.

			== Photos ==
			{{EveryCRT gallery\|heights=120}}

	== Variants ==		== Variants ==

Arclight-MCP-Bot: Adding product photos from ShopGoodwill listing (via update-page on MediaWiki MCP Server)

2026-02-25T23:55:54Z

Adding product photos from ShopGoodwill listing (via update-page on MediaWiki MCP Server)

← Older revision		Revision as of 23:55, 25 February 2026
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	\|frequency=50Hz,60Hz		\|frequency=50Hz,60Hz
	\|power_max=200		\|power_max=200
			\|image_main=Mitsubishi C-3919N front.jpg
			\|images=Mitsubishi C-3919N front-left.jpg,Mitsubishi C-3919N right.jpg,Mitsubishi C-3919N rear.jpg,Mitsubishi C-3919N rear-right.jpg,Mitsubishi C-3919N controls.jpg,Mitsubishi C-3919N connectors.jpg,Mitsubishi C-3919N label.jpg,Mitsubishi C-3919N top.jpg
	}}		}}

Arclight-MCP-Bot: Correcting inputs/outputs based on rear panel photo - RGBHV with 5 BNCs, loop-through outputs, adding N variant (via update-page on MediaWiki MCP Server)

2026-02-25T23:50:31Z

Correcting inputs/outputs based on rear panel photo - RGBHV with 5 BNCs, loop-through outputs, adding N variant (via update-page on MediaWiki MCP Server)

← Older revision		Revision as of 23:50, 25 February 2026
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	\|brand=Mitsubishi		\|brand=Mitsubishi
	\|model_code=C-3919		\|model_code=C-3919
			\|variants=N
	\|release_year=1983		\|release_year=1983
	\|crt_type=Computer monitor		\|crt_type=Computer monitor
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	The '''Mitsubishi C-3919''' is a 19-inch professional color display monitor manufactured by Mitsubishi Electric for use with the Advanced Electronics Design (AED) 512 and 767 Color Graphics Terminals. It features an in-line gun shadow mask CRT with self-convergence technology.		The '''Mitsubishi C-3919''' is a 19-inch professional color display monitor manufactured by Mitsubishi Electric for use with the Advanced Electronics Design (AED) 512 and 767 Color Graphics Terminals. It features an in-line gun shadow mask CRT with self-convergence technology.

			== Variants ==
			* '''C-3919N''' — NTSC/North American version (AC120V, 60Hz only)

	== Features ==		== Features ==
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	* Self-convergence design requiring no electrical convergence adjustments		* Self-convergence design requiring no electrical convergence adjustments
	* Switchable 75Ω / high-impedance input termination for daisy-chaining multiple monitors		* Switchable 75Ω / high-impedance input termination for daisy-chaining multiple monitors
			* Loop-through outputs for daisy-chaining to additional monitors
			* Separate RGB and sync termination switches
	* Anti-spark circuit protection		* Anti-spark circuit protection
	* Stable convergence with less than 0.5mm deviation in the center and 0.8mm elsewhere		* Stable convergence with less than 0.5mm deviation in the center and 0.8mm elsewhere
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	* Warm-up time of 20 minutes maximum		* Warm-up time of 20 minutes maximum

	The monitor ~~supports both~~ sync~~-on-green~~ (~~RGsB~~) and ~~separate~~ sync ~~(RGBS) configurations via its BNC~~ inputs.		The monitor accepts RGBHV via 5 BNC connectors, supporting either composite sync (CSYNC) on the HD input alone, or separate horizontal and vertical sync using both HD and VD inputs.

	== Specifications ==		== Specifications ==
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	{{CRT input		{{CRT input
	\|label=RGB In		\|label=RGB In
	\|signal=~~RGBS~~		\|signal=RGBHV
	\|connector=BNC		\|connector=BNC
	\|count=1		\|count=1
	\|audio=None		\|audio=None
	\|sync=CSYNC		\|sync=HSYNC+VSYNC
			\|location=rear
			\|notes=5 BNC connectors (R, G, B, HD, VD). HD input accepts composite sync (CSYNC) or horizontal sync; VD accepts vertical sync. Use HD alone for CSYNC operation.
			}}
			{{CRT output
			\|label=RGB Loop
			\|output_type=Video
			\|signal=RGBHV
			\|connector=BNC
			\|count=1
	\|location=rear		\|location=rear
	\|notes=4 BNC ~~connectors (R, G, B, Sync). Also supports sync~~-on-~~green (RGsB) by compositing sync with the green signal~~.		\|notes=5 BNC loop-through outputs for daisy-chaining additional monitors. Set termination switches to HI when looping through.
	}}		}}

Arclight-MCP-Bot: Adding derived TVL (600) based on 768 pixel horizontal resolution and 20 MHz video bandwidth (via update-page on MediaWiki MCP Server)

2026-02-25T23:46:50Z

Adding derived TVL (600) based on 768 pixel horizontal resolution and 20 MHz video bandwidth (via update-page on MediaWiki MCP Server)

← Older revision		Revision as of 23:46, 25 February 2026
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	\|screen_size_in=19		\|screen_size_in=19
	\|aspect_ratio=4:3		\|aspect_ratio=4:3
			\|tvl=600
	\|mask_type=Shadow mask		\|mask_type=Shadow mask
	\|gun_type=In-line		\|gun_type=In-line
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	== Features ==		== Features ==
	The C-3919 is designed for high-resolution graphics display, capable of showing up to 2000 characters or 441,600 pixels. Key features include:		The C-3919 is designed for high-resolution graphics display, capable of showing up to 2000 characters or 441,600 pixels (768×575 maximum resolution). Key features include:

	* Self-convergence design requiring no electrical convergence adjustments		* Self-convergence design requiring no electrical convergence adjustments

Arclight-MCP-Bot: Creating CRT model page for Mitsubishi C-3919 (via create-page on MediaWiki MCP Server)

2026-02-25T23:42:02Z

Creating CRT model page for Mitsubishi C-3919 (via create-page on MediaWiki MCP Server)

New page

{{CRT model
|brand=Mitsubishi
|model_code=C-3919
|release_year=1983
|crt_type=Computer monitor
|form_factor=Standard
|screen_size_in=19
|aspect_ratio=4:3
|mask_type=Shadow mask
|gun_type=In-line
|visible_w=380
|visible_h=280
|visible_diag=19
|h_scan_min=15.5
|h_scan_max=24
|v_scan_min=40
|v_scan_max=90
|frequency=50Hz,60Hz
|power_max=200
}}

The '''Mitsubishi C-3919''' is a 19-inch professional color display monitor manufactured by Mitsubishi Electric for use with the Advanced Electronics Design (AED) 512 and 767 Color Graphics Terminals. It features an in-line gun shadow mask CRT with self-convergence technology.

== Features ==
The C-3919 is designed for high-resolution graphics display, capable of showing up to 2000 characters or 441,600 pixels. Key features include:

* Self-convergence design requiring no electrical convergence adjustments
* Switchable 75Ω / high-impedance input termination for daisy-chaining multiple monitors
* Anti-spark circuit protection
* Stable convergence with less than 0.5mm deviation in the center and 0.8mm elsewhere
* Video amplifier frequency response of ±3dB from 50Hz to 20MHz
* Rise and fall times shorter than 20ns
* Warm-up time of 20 minutes maximum

The monitor supports both sync-on-green (RGsB) and separate sync (RGBS) configurations via its BNC inputs.

== Specifications ==
* '''Video input levels:''' 0.7–1.5 Vp-p for RGB, 1.0–5.0 Vp-p for sync
* '''Blanking time:''' Horizontal <9.5μs, Vertical <0.8μs
* '''Raster size regulation:''' <4mm change with 0–200μA beam current
* '''Linearity:''' Better than ±7%
* '''Raster distortion:''' Less than 2% of raster height

{{CRT voltage range
|voltage_min=100
|voltage_max=120
}}
{{CRT voltage range
|voltage_min=220
|voltage_max=240
}}
{{CRT input
|label=RGB In
|signal=RGBS
|connector=BNC
|count=1
|audio=None
|sync=CSYNC
|location=rear
|notes=4 BNC connectors (R, G, B, Sync). Also supports sync-on-green (RGsB) by compositing sync with the green signal.
}}

[[Category:CRT models]]
[[Category:Mitsubishi]]
[[Category:Computer monitors]]