Quote:
Originally Posted by timmy
there is a blanker circuit out there and was wondering if there is one for this motorola or maybe this one would work to get rid of those lines when the brightness is turned up. the circuit i saw was for an admiral set with a 7jp4 crt. its got a 250pf 1 kv cap and a 220k resistor in series from pin 5 of the 6sl7 to pin 3 of the crt. the crt pin 3 goes to ground and this wire should be cut off ground and attached to these 2 components to pin 5 of 6sl7. does this sound right for the motorola ts18 chassis. this setup is said to eliminate those lines with the bright up.
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You'd better use a variable resistor of a bigger value, adjust the brightness control to get an acceptable picture, and then turn the variable resistor to eliminate the retrace lines. After that you can measure the value and use a fixed resistor of the closest value. The voltage rating of the capacitor should be at least 1000v.
Blanking intervals in modern video signals often carry some extra information (teletext, copy protection, etc), causing it's visibility on the retrace as bright dotted lines. It may be difficult to supress them completely, causing you to set much deeper blanking.