120 and 180 line viewing
Posted: Wed Jul 23, 2014 6:10 am
Work is busy, but I'm now hankering after wasting a little time again. And what better way to do this than indulge in NBTV? Though I have to say that what follows is barely "NB" tv at all...
How about "changing one capacitor" for an easy new project?
The mission: to convert my ancient 405-line Argus televisor (depicted) to display 120 and 180 line pictures, as beloved of the Germans in the early-to-mid thirties. I'd like to see how good they were. I have Darryl's World Converter to hand to supply any conceivable signal.
Here, I ask for opinions from those more knowledgeable with electronic theory than I. Is all I have to do - to change C57? (click on tb.gif to see the circuit.) Or will the linearity and width then be affected too? If so, what else is to be done?
It might be, due to the slower trace speed, my Argus will give a brighter, 'sparkier' picture at 120/180 lines than at 405. We shall see.
Steve O
How about "changing one capacitor" for an easy new project?
The mission: to convert my ancient 405-line Argus televisor (depicted) to display 120 and 180 line pictures, as beloved of the Germans in the early-to-mid thirties. I'd like to see how good they were. I have Darryl's World Converter to hand to supply any conceivable signal.
Here, I ask for opinions from those more knowledgeable with electronic theory than I. Is all I have to do - to change C57? (click on tb.gif to see the circuit.) Or will the linearity and width then be affected too? If so, what else is to be done?
It might be, due to the slower trace speed, my Argus will give a brighter, 'sparkier' picture at 120/180 lines than at 405. We shall see.
Steve O