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Old 6th Dec 2019, 8:30 pm   #181
Panrock
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Default Re: Bush TV22 with TC184 B3 converter.

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Originally Posted by Argus25 View Post
Equalization pulses normally help the probability of a good interlace, regardless of how good or poor the vertical integrator is. Ideally you have a good multi-stage, two or three stage RC integrator and the equalization pulses present in the sync too and the scenario is optimized for perfect interlace. This was standard practice for American TV sync signals immediately post WW2 and their TV sets seldom had any interlace issues as a result. If the vertical integrator is a poor design to the extreme, then, the equalization pulses cannot help.That is why they are not beneficial for the standard TV22
It's been reported that the selection of the equalising pulses option on an Aurora can cause hooking at the top of the picture on a TV22. This would have been with the original component values. Would the proposed mods to the vertical integrator help here too, I wonder?

Steve
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Old 6th Dec 2019, 9:55 pm   #182
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Default Re: Bush TV22 with TC184 B3 converter.

Have to report the TV22 that started this topic has developed a number of faults.

DFWB.
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Old 6th Dec 2019, 10:00 pm   #183
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Default Re: Bush TV22 with TC184 B3 converter.

Panrock wrote" "It's been reported that the selection of the equalising pulses option on an Aurora can cause hooking at the top of the picture on a TV22. This would have been with the original component values. Would the proposed mods to the vertical integrator help here too, I wonder?"

I've often been tempted switch in the equalising pulses but as the story goes the inventor of the 405 line system Alan Blumlein wouldn't countenance such things.

DFWB.
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Old 7th Dec 2019, 9:04 am   #184
Argus25
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Default Re: Bush TV22 with TC184 B3 converter.

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Originally Posted by FERNSEH View Post
Panrock wrote" "It's been reported that the selection of the equalising pulses option on an Aurora can cause hooking at the top of the picture on a TV22. This would have been with the original component values. Would the proposed mods to the vertical integrator help here too, I wonder?"

I've often been tempted switch in the equalising pulses but as the story goes the inventor of the 405 line system Alan Blumlein wouldn't countenance such things.

DFWB.
I'm pretty confident Mr. Blumlein would have recognized the value of equalizing pulses, even at a glance, because its so obvious they were helpful with interlace issues and he was a true Television genius, well ahead of the curve, like Manfred Von Ardenne in Germany and well ahead of the researchers in the USA at the time.

Blumlein of course was also the inventor of stereo audio and a genius with Radar. So I don't believe the story that he wouldn't countenance equalizing pulses, it makes no sense at all.
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Old 7th Dec 2019, 9:59 am   #185
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Default Re: Bush TV22 with TC184 B3 converter.

All the first generation EMI televisions have excellent interlacing and their circuitry is not overly complex.

Peter
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Old 8th Dec 2019, 11:45 pm   #186
Argus25
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Default Re: Bush TV22 with TC184 B3 converter.

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All the first generation EMI televisions have excellent interlacing and their circuitry is not overly complex.

Peter
Yes the circuits are not complex at all, they simply need proportions that are correct in the filtering/integrators. Which makes it even more strange that some manufacturers didn't do it correctly.

It was also totally blundered in two of my USA made 1939 sets, the Andrea KTE-5 and The Meisser kit TV. But in those cases nobody would see it with the 5" crt's 5AP4/5BP4 respectively. The 5AP4 was merely a short 5BP4 made for Andrea by National Union.
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