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Argus25 · 30th Sep 2019, 11:49 pm

....But it's not the first time I have seen this, both my pre WW2 sets, the KTE-5 and the Meissner had exactly the same issue with an integrator with 10 times the suitable time constant. On those though, because of the 5 inch screen the interlace was less of a problem that the poor vertical lock. It was also odd in that at the time, in 1939, the correct time constant for the vertical sync separator's integrator had already been outlined by RCA and was 50uS, at least for the American composite sync train, and that value also seems close to correct, or at least in the ball park, for the 405 line signal's sync.

30th Sep 2019, 11:49 pm	#86
Argus25 No Longer a Member Join Date: Oct 2016 Location: Maroochydore, Queensland, Australia. Posts: 2,679	Re: Bush TV22 with TC184 B3 converter. ....But it's not the first time I have seen this, both my pre WW2 sets, the KTE-5 and the Meissner had exactly the same issue with an integrator with 10 times the suitable time constant. On those though, because of the 5 inch screen the interlace was less of a problem that the poor vertical lock. It was also odd in that at the time, in 1939, the correct time constant for the vertical sync separator's integrator had already been outlined by RCA and was 50uS, at least for the American composite sync train, and that value also seems close to correct, or at least in the ball park, for the 405 line signal's sync.