can an oscilloscope tube be made into a television?

Question

i am talking about the curcular ones

Answer 1

Yes, all you have to do is do the same thing your TV does - have circuitry to decode horizontal and vertical synch signal, generate sawtooth voltages based on them, apply the properly-scaled vertical sawtooth to the vertical plates, same with the horizontal, and apply the video to the intensity input.

The CRTs are similar, but oscopes will use electrostatic deflection rather than a TV which used magnetic. This just means your sawtooths for a TV are more of a low voltage current source and for an oscope a low-current high-voltage source. Also, oscopes are much wider bandwith than TV CRTs. Because of this, it is much easier to make a TV out of an oscope than the other way around.

Answer 2

yes but it is not easy and has many drawbacks.

first, not all 'scopes have the necessary bandwidth in the amplifiers if they were designed for audio only. ideally, if you have access to the tv sets deflection voltages, those can sometimes be applied directly to the 'scopes deflection inputs and avoid the internal amps. otherwise you need a scope that has x-y capability, bypassing the internal horz timebase.

next, the scope has to have a z-axis input, some have a bridge on the back for this. if not, you might be able connect video to the cathode but be careful because in some scope designs, particularly tektronixs, the cathode is at high voltage and not to be messed with. the z-axis is the intensity modulation so that the raster can display the light and dark areas of the picture content.

finally you will see a not so pretty picture. the phosphors in a scope are not the same as TV in both duration and color. yes the scope will be monochrome, typical blue, green or orange and not B/W. any moving pictures will be blurred. second, putting the video directly on the cathode means it still has the color subcarrier, so pix brightness will respond to color content.

you could create the effect of a 1950s era TV with parts from a scope, and if that is what you need, give it a try.

Answer 3

That's CIRCULAR. And yes, sorta kinda. There is a point in a TV circuit that you can put the lead to an oscilloscope on and get a green-and-white image, although it's rotated 90 degrees.

Answer 4

sorry guys..... i dont think so........ CRO tube has entirely different mechanism........ it can produce only high velocity e-beams..... though in different but limited colors/........

cant be used for high resolution TV tubes yar.........

Answer 5

look this one up.