Moderators: Dave Moll, Andrew Davie, Steve Anderson
DrZarkov wrote:As you can see an this photo, the picture was not really green, but "greenish". The picture is of course from the homepage of the late Eckard Etzold (http://bs.cyty.com/menschen/e-etzold/ar ... aenger.htm)
I like from old black and white sets, that the picture is almost never really black and white. (Some are very close to it.) I prefered the warm tone of our "Siemens Bildmeister" over the "blue" "Saba Schauinsland" we had in our guestroom until mid 1980s. I have here in my working room 10 old sets, and they all have slightly different "colours".
Klaas Robers wrote:The different colours of white in the picture tubes is not that strange. The "white" phosphor is in most cases a mixture of blue phosphor and yellow phosphor. If you watch a working B/W CRT via a magnifying glass you will see yellow and blue dots, the phosphor grains. In fact it is the same phosphor that is also used in the old colour "33" TL tubes.
By selecting the mixture ratio the colour can be shifted somewhat to the yellow or to the blue hue. So, if more companies made CRT's it is very unlikely that they would all have had the same white point.
However, then came colour TV. New phosphors were developed for Red, Green and Blue. While mixing them for TL-tubes you can make all colours of TL's you like. And you get a better colour rendering of these 'white' tubes, because the 33-type yellow and blue TL doesn't contain red, so you always show having an unhealthy greyish skin. With RGB-TL's (colours 82, 83, 84, 85) this is much better. Even flesh at the butchers show case looks nice and red.
DrZarkov wrote:At british websites I see 405 line sets with a pink picture (I think it was a colour filter with some kind of function I do not understand), and of course there was the "Argus" TV set, which had sometimes a really green tube, made for radar purposes.
The black and white picture seems to be black and white at any old TV, but if you switch on several sets at the same time, you see the difference. Saba's tendence is more to blue, Siemens more to yellow. Philips seems to be somewhere between. Here is a picture of a "Saba Schauinsland", one of the first sets after the war (625 lines) an a screenshot of a typical "blue-ish" black and white set from that time (made by "Graetz"). Unfortunally there is no analog TV on air here this area, so I can't switch on several of my sets at the same time with the same picture.
DrZarkov wrote:I have now 14 black and white sets (NBTV, monitors and colour TV in the living room not included), but I've concentrated on small sets (max. 30 cm screen), I've sold all my big box sets before I've moved to the place I live now. I prefer of course sets with a CRT, but the Casio TV 21 is of course an acceptable exception
Users browsing this forum: No registered users and 7 guests