Talk:Quadruplex videotape

message: 2 inch Quadruplex videotape is on the "On this day" section of the Main Page on April 14. General Eisenhower 23:59, 14 April 2006 (UTC)
thread_title:  [[Wikipedia:Selected anniversaries/April 14]] 

message: I worked with the VR1000, 1200, 2000 and 2000B and none of these used three phase supply as the article claims. This was with 240v UK mains supply, so perhaps it was different for the US 120v models.
You are correct, UK units were not three phase, as they used half the amps.Telecine Guy 04:47, 7 June 2007 (UTC)
thread_title:  Three Phase Supply 

message: *The first two contain no content.
12.208.201.235 20:22, 23 August 2007 (UTC)
thread_title:  Article External Links 

message: * It does not cite any references or sources. Please help improve it by citing reliable sources. Tagged since April 2008.
*** Most of the references is in the External Links, these have not been make in a long time, so it cannot be referenced as nice as newer tech gear.
*Its tone or style may not be appropriate for Wikipedia. Tagged since April 2008.
*** It would be nice if you gave a sample, this is old tech gear that engineers made and worked on. 
Thank you Telecine Guy 07:09, 25 October 2008 (UTC)
thread_title:  This article or section has multiple issues tag, lets talk 

message: Ok, multiple issues with the dates of many of the late 1960s and 1970s Quad decks. I'm a former Canadian Broadcasting Corporation (CBC) Broadcast engineer, and I know we bought our AVR-2s and ACR-25 machines in 1972, when the Jarvis/Mutual Street Master Control was rebuilt and computerized. The ACR-25 debuted in 1969. Not exactly sure when the AVR-2 came online, but CBC bought them in 1972. We bought lots of the crappy AVR-3s for the 1976 Montreal Olympics, as the CBC was the host broadcaster. I know we bought them in early spring 1976, so they could have been around in 1975.  They were cursed, and were not in existence by the time I started working at the CBC. They were the first Quad machines to be sold off or deactivated, and were replaced by Sony BVR-2000 one-inch type C machines in the early 1980s. When I have some solid sources, I will be changing the dates (although I know what year the CBC bought their AVR-2s and ACR-25s, I'm not an official source ;-) ).--99.233.113.229 (talk) 20:59, 3 July 2016 (UTC)
thread_title:  IMPROPER SOURCING: Dates are completely wrong for the ACR-25, AVR 1, 2 AND 3.  

message: Hello fellow Wikipedians,
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thread_title:  External links modified 

message: Check out the following details, which are important for the history of VTR color capabilities.  Because of the nature of direct composite FM recording, the first, or nearly the first Ampex monochrome VTRs could actually record color, but poorly. Of course this poor quality capability was not advertised.  Those same machines could not play back in color at all.
Around 1957, RCA designed color conversions for the Ampex machines, as already mentioned in the article.  Color was recorded properly with high quality, but fine detail was compromised somewhat on playback because the early color machines used the heterodyne method to stabilize the color signal.  The result was very good color on the new narrow band color receivers at home, but the fine luminance detail at home was compromised.  With the heterodyne method, the 1.5 MHz bandwidth of Orange (skin tone) and cyan, was effectively reduced to 0.5 MHz, which had no noticible effect on the newer TV receivers with narrow band color processing.  There was an effect on the 1954 and 1955 RCA Victor color receiver models, which had wide-band color processing.
Starting in 1962, the solid state RCA machines had an analog delay line TBC for direct color recovery, not using the heterodyne method.  This direct color method restored 100 percent of the luminance detail that can be transmitted over the air.  Picture detail at home was visibly improved.
Also, the RCA color track TV receivers of 1985 had wide-band I/Q color processing, which benefitted in color detail from stations playing video tapes on the newer post 1961 VTRs with direct color recovery.
Ampex as well had a similar improvement, and their own direct color equipment sometime around 1962.  I think it was called colortek.
Ohgddfp (talk) 16:33, 27 February 2019 (UTC)
thread_title:  Types of Color 

message: This seems to be an error.  Need some kind of reference because Mr. Allen's first name of the famous Allen Electronics was not Steve.  Steve Allen was a famous entertainer and author.  Ohgddfp (talk) 16:43, 27 February 2019 (UTC)
thread_title:  Steve Allen of Allen Electronics 

message: I am moving the following uncited material here until it can be properly supported with inline citations of reliable, secondary sources, per WP:V, WP:NOR, WP:CS, WP:NOR, WP:IRS, WP:PSTS, et al. This diff shows where it was in the article. Nightscream (talk) 18:58, 29 August 2022 (UTC)
thread_title: Uncited material in need of citations

message: Might this go somewhere to clear up the complicated NTSC/PAL paragraph?
                         	NTSC    	NTSC    	PAL
                         	B&W	Color   	PAL
Frames per second        	30      	29.97   	25
Fields per second        	60      	59.94   	50
Head rotations per field 	4       	4       	5
Stripes per field        	16      	16      	20
Head rotations per second	240     	239.76  	250
Stripes per second       	960     	959.04  	1000
Head rotations per minute	14400   	14385.61	15000
 Temblast (talk) 23:53, 27 May 2023 (UTC)
thread_title:  Clear numbers