Richtige Fernseher haben Röhren!
In Brief: On this site you will find pictures and information about some of the electronic, electrical and electrotechnical technology relics that the Frank Sharp Private museum has accumulated over the years .
Premise: There are lots of vintage electrical and electronic items that have not survived well or even completely disappeared and forgotten.
Or are not being collected nowadays in proportion to their significance or prevalence in their heyday, this is bad and the main part of the death land. The heavy, ugly sarcophagus; models with few endearing qualities, devices that have some over-riding disadvantage to ownership such as heavy weight,toxicity or inflated value when dismantled, tend to be under-represented by all but the most comprehensive collections and museums. They get relegated to the bottom of the wants list, derided as 'more trouble than they are worth', or just forgotten entirely. As a result, I started to notice gaps in the current representation of the history of electronic and electrical technology to the interested member of the public.
Following this idea around a bit, convinced me that a collection of the peculiar alone could not hope to survive on its own merits, but a museum that gave equal display space to the popular and the unpopular, would bring things to the attention of the average person that he has previously passed by or been shielded from. It's a matter of culture. From this, the Obsolete Technology Tellye Web Museum concept developed and all my other things too. It's an open platform for all electrical Electronic TV technology to have its few, but NOT last, moments of fame in a working, hand-on environment. We'll never own Colossus or Faraday's first transformer, but I can show things that you can't see at the Science Museum, and let you play with things that the Smithsonian can't allow people to touch, because my remit is different.
There was a society once that was the polar opposite of our disposable, junk society. A whole nation was built on the idea of placing quality before quantity in all things. The goal was not “more and newer,” but “better and higher" .This attitude was reflected not only in the manufacturing of material goods, but also in the realms of art and architecture, as well as in the social fabric of everyday life. The goal was for each new cohort of children to stand on a higher level than the preceding cohort: they were to be healthier, stronger, more intelligent, and more vibrant in every way.
The society that prioritized human, social and material quality is a Winner. Truly, it is the high point of all Western civilization. Consequently, its defeat meant the defeat of civilization itself.
Today, the West is headed for the abyss. For the ultimate fate of our disposable society is for that society itself to be disposed of. And this will happen sooner, rather than later.How to use the site:
OLD, but ORIGINAL, Well made, Funny, Not remotely controlled............. and not Made in CHINA.
- If you landed here via any Search Engine, you will get what you searched for and you can search more using the search this blog feature provided by Google. You can visit more posts scrolling the left blog archive of all posts of the month/year,
or you can click on the main photo-page to start from the main page. Doing so it starts from the most recent post to the older post simple clicking on the Older Post button on the bottom of each page after reading , post after post.
You can even visit all posts, time to time, when reaching the bottom end of each page and click on the Older Post button.
- If you arrived here at the main page via bookmark you can visit all the site scrolling the left blog archive of all posts of the month/year pointing were you want , or more simple You can even visit all blog posts, from newer to older, clicking at the end of each bottom page on the Older Post button.
So you can see all the blog/site content surfing all pages in it.
- The search this blog feature provided by Google is a real search engine. If you're pointing particular things it will search IT for you; or you can place a brand name in the search query at your choice and visit all results page by page. It's useful since the content of the site is very large.
Note that if you don't find what you searched for, try it after a period of time; the site is a never ending job !
Every CRT Television saved let revive knowledge, thoughts, moments of the past life which will never return again.........
Many contemporary "televisions" (more correctly named as displays) would not have this level of staying power, many would ware out or require major services within just five years or less and of course, there is that perennial bug bear of planned obsolescence where components are deliberately designed to fail and, or manufactured with limited edition specificities..... and without considering........picture......sound........quality........
..............The bitterness of poor quality is remembered long after the sweetness of todays funny gadgets low price has faded from memory........ . . . . . .....Don't forget the past, the end of the world is upon us! Pretty soon it will all turn to dust!
Have big FUN ! !
©2010, 2011, 2012, 2013, 2014 Frank Sharp - You do not have permission to copy photos and words from this blog, and any content may be never used it for auctions or commercial purposes, however feel free to post anything you see here with a courtesy link back, btw a link to the original post here , is mandatory.
All sets and apparates appearing here are property of
Engineer Frank Sharp. NOTHING HERE IS FOR SALE !
Friday, December 10, 2010
GRUNDIG SUPER COLOR C 2404 SERIE F 3015 CHASSIS CUC 51KT CRT TUBE MITSUBISHI 370JMB22-TC03 VIEW
CRT SOCKET (BILROHRPLATTE 29304-070.03)
First CRT socket from GRUNDIG With RGB Amplifier on Board. All previous were on the CHASSIS.
The present invention relates in general to a color picture tube with a shadow mask, and in particular to a color picture tube having a shadow mask which is provided with a plurality of electron beam transmissive aperture rows extending perpendicularly to the scanning lines and each comprising a plurality of the individual rectangular apertures for transmission of the electron beams arrayed in line with a predetermined pitch.
Lately, with an effort to simplify the structure of deflection system and at the same time to enhance the visual sharpness of the produced image of the color picture tube with the shadow mask such as color cathode ray tube, Braun tube or the like (hereinafter referred to also as CPT), there have been developed and increasingly employed CPT's of the shadow mask type in which the shadow mask is provided with aperture rows extending orthogonally to the scanning lines and each comprising a plurality of the electron beam transmissive rectangular apertures (hereinafter also referred to as apertures) arrayed vertically in line with a predetermined vertical pitch and in which three electron guns are arrayed in line, in place of the heretofore known color picture with shadow mask in which circular phosphor dots are arrayed in a form of equilateral triangle. However, the color picture tube of the above type suffers from the drawbacks that a strip or fringe pattern, that is, moire of a great pitch is produced as a result of the interaction between shades of the bridge portions between the rectangular apertures formed vertically in a repeated pattern with the predetermined pitch and the bright-dark portions of the scanning lines, thereby to deteriorate the picture quality of the produced image.
Many and various attempts have been hitherto proposed for reducing the moire phenomenon. According to a known method, the apertures of the horizontally adjacent aperture rows are deviated from one another in respect of the vertical position for a distance of 1/αPy where α is an integer and Py is the vertical pitch of the aperture row. This method starts from two observations. Namely, on one hand, the moire is determined by the scanning lines and the deviation, since the moire pitch becomes greater as the difference between the pitch of the scanning line and the vertical pitch of the apertures in the rows is selected smaller and since the deviation causes horizontal fringe whose pitch is Py /α. In other words, the deviation in the vertical position between the horizontally adjacent rows will bring about a shade patern in the substantially horizontal direction and the moire will become more imperceptible as the magnitude of the deviation is selected smaller because the ratio between the pitch of the scanning line and the pitch of the shade pattern will then become large. On the other hand, in accordance with the other observation, the horizontal pattern of shade, i.e. interlaced dark and bright portions will not be produced if the integrated value of the electron transmissivity or through rate of the apertures remains the same for each of the sanning lines. Accordingly, the moire can be suppressed by adjusting the deviation and the width of the bridge portions between the vertically aligned aperture in a row. However, the inventors have found after repeated experiments that the hitherto proposed method as described above can not make the moire in oblique directions imperceptible although the method is certainly effective in suppressing the moire appearing in a form of bright and dark pattern in the vertical position.
It has also been proposed to array the apertures in a random pattern. However, this solution meets with difficulties in the manufacturing thereof.
Accordingly, a main object of the invention is to provide a color picture tube of the shadow mask type in which the moire is made imperceptible.
Another object of the invention is to realize a shadow mask for a color picture tube which is effective in suppressing the occurrence of the moire.
Still another object of the invention is to reduce undesirable influences of moire due to the harmonics of the luminance distribution pattern of the scanning lines and of the transmissivity or through rate pattern of the vertically arrayed apertures and the poor linearity of the vertical distribution pattern of the scanning lines.
A further object of the invention is to provide a color picture tube which can be employed commonly in NTSC (National Television System Commitee), PAL (Phase Alternation By Line) and SECAM (Sequential a Memoire) color television systems without any appreciable moire.
With the above objects in view, the present invention contemplates to determine the array of the apertures so that the pitch and phase of beat components, ie moires, produced by the mutual product of the vertical transmissivity or through rate distribution pattern of the aperture row and the vertical luminance distribution pattern of the scanning lines will take predetermined values.
More specifically, the shadow mask according to the present invention is so constructed as to comprise at least two different types of the aperture rows of different deviations which fulfill the following condition: ##EQU2## wherein Py represents the pitch of apertures in the vertical aperture row, Δy represents the vertical deviation between the apertures in the horizontally adjacent aperture rows, n is a positive interger of 1 to 5 and k is an odd number smaller than 2n.
The shadow mask according to the invention provides significant advantages particularly when the luminance distribution pattern of the scanning line cannot be approximated by a sine wave or when the face plate of the color picture tube is remarkably curved at peripheral portions.