07-09-2010, 09:37 PM
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First Light: 1952-2011
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Join Date: Jun 2009
Location: Great Mills, MD
Posts: 4,174
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Quote:
Originally Posted by old_tv_nut
In the CTC-5 , it's a DC control, which unfortunately runs the brightness up and down along with the contrast because the cathode (and plate) current is not zero at black. Several people with CTC-5's have modified their sets to be like your CTC-7 to fix that problem, but it reduces the DC coupling
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Um, I have a CTC-9.... 
Quote:
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Keep looking and I will too -it's around here (or maybe audiokarma?) somewhere. The brightness could still work if it changes the height of the blanking interval and you end up clamping to the bottom of that - but not sure if that is the case.
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Will do! 
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