Two modifications CRT Focus

Two modifications CRT Focus
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Perhaps peer to peer TV technician never found one that has a dual focus CRT were severely damaged (hit by lightning for example), and usually the most severe damagewas in the TV chassis itself. As for the damage in a CRT is rather rare. And if this happens then there is no other way but to make the TV kanibalan not, but it is not the case with CRT.

Well as we all know the use of dual focus CRT itself is also somewhat rare, below there is one series that serves to modify the two tubes into a focus so that focus can be usedto focus a single TV chassis / TV china, of course with a few additional components andcheap. There are several brands that I know have tavung dual focus, namely the SonyTrinitron and Samsung or 29Z7 29Z4. These modifications can be made ​​into a tube tvvarious brands.

Or for those of you who are confused distinguish between one or two focus-focus, haveseen enough of Flyback output cables, we usually find only one cable, two taps for CRTFlyback his focus has 3 wires (fokus1, fokus2, Screen)

In this modification we need only need one big trimpot (2watt or more) that is worth 20Mohm. Actually, this focus voltage division itself has been integrated in the originalcircuit in the module RGB or even in two focus FBT TV chassis itself. The scheme is asfollows:




Screen from the FBT from the regular TV / china can plug it directly into the G2 pins of the RGB socket. And after all is installed correctly, the next step is that you only need toadjust the sharpness of the image that appears.

Quite easy and simple, but it works very well. It will be very useful for those of you whoonly have a dual focus CRT without a chassis.

May be useful.

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