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Author Topic: Distortion (videoclip included)  (Read 1225 times)

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superboss

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Distortion (videoclip included)
« on: July 07, 2011, 03:57:53 pm »
Anyone know what is causing the phenomenon in the video below?


The monitor is a NANAO MS8-26SU.
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qrz

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Re: Distortion (videoclip included)
« Reply #1 on: July 09, 2011, 09:06:30 am »
changes in beam current (crt) is affecting the regulated B+.
this will be more noticable with the dark (low beam current ) background shown.
all crt sets will exhibit this to some extent.
excessive distortion can be due to poor regulation . or in the case of blooming, a weak crt ...
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lilshawn

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Re: Distortion (videoclip included)
« Reply #2 on: July 09, 2011, 01:42:46 pm »
a weak main filter cap can cause all sorts of weirdness like that.

it's the biggest 220 or 330uf 2/3 or 400 volt cap on the board.
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boardjunkie

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Re: Distortion (videoclip included)
« Reply #3 on: July 09, 2011, 04:25:59 pm »
That looks excessive to me. I bet theres a cap in the pwr supply thats not doing its job.....
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