A Once in a Lifetime Dream Project

[Sandy G]

I would be more nervous than a cat in a room full of rocking chairs tryin' to work on that bad boy...

[yagosaga]

Originally Posted by Sandy G

I would be more nervous than a cat in a room full of rocking chairs tryin' to work on that bad boy...

This is the raster which appears on the screen without an antenna signal. I have got the same raster before I tuned in the channel.

[tubesrule]

Originally Posted by yagosaga

This is the raster which appears on the screen without an antenna signal. I have got the same raster before I tuned in the channel.

This is an interesting observation Eckhard. Looking at the schematic it appears that the line and frame oscillator stages use blocking oscillators, so I would have expected the set display a normal blank raster. What do you think is causing the displayed raster to look like this when no signal is present?

[yagosaga]

Originally Posted by tubesrule

This is an interesting observation Eckhard. Looking at the schematic it appears that the line and frame oscillator stages use blocking oscillators, so I would have expected the set display a normal blank raster. What do you think is causing the displayed raster to look like this when no signal is present?

The height of the synchronisation input level can be controlled by the 5 K control at the cathode of the oscillator tube. My experience is, when I have adjusted the sync level for best synchronisation, and I draw the antenna plug, the raster looks frazzled.