World's smallest color CRT

[etype2]

Originally Posted by colorfixer

If one were to swap the two photodiodes in addition to the horizontal deflection coil connection polarization, it would change which photodiode was used as the "start" index, and which was used as the "stop" index?

I have two of these CRT's, one is to experiment on. I could remove the photodiode module and turn it 180 degrees to see what would happen. Edit. Whoops .... That would be impossible. The module would face the wrong direction.

[colorfixer]

Originally Posted by etype2

I have two of these CRT's, one is to experiment on. I could remove the photodiode module and turn it 180 degrees to see what would happen. Edit. Whoops .... That would be impossible. The module would face the wrong direction.

Well, not exactly: you would want to swap the connections from the respective photodiodes: the "start" diode would be connected to the "stop" photodiode's connector, and vice-versa. Thus the "start" signal which would be referenced by the first index phosphor would be generated from the first stripe the beam hit as it scanned, and the "stop" would therefore be generated and detected by the beam hitting the second index phosphor. Remember that the index order would be reversed if we forced the beam to sweep in the opposite direction by reversing the yoke connections.

[wa2ise]

You could leave the horizontal alone, and reverse the vertical yoke connections. Then the indexing is still valid.

[jr_tech]

Originally Posted by wa2ise

You could leave the horizontal alone, and reverse the vertical yoke connections. Then the indexing is still valid.

Slaps forehead !
I think that you have nailed the best solution!

jr