Quote:
Originally Posted by vts1134
Home Stretch it is!
After much adjustment of front and rear controls I've got is as linear as I could. A couple notes: the sound is terrible, I have to turn the set up much too loud to hear anything. The video below shows what happens to the picture when I adjust the contrast control. The video starts with the contrast cranked all the way up then some adjusting from all the way up to all the way down a few times.
http://www.youtube.com/watch?v=jVzPM6IlFeE
One other thing I've noticed is that the picture isn't level, it slopes from left to right. Is there an adjustment for that, or is it a symptom of another problem? |
WooHoo! Is that cool or what.
The bending when you turn up the contrast is related to the rather primitive sync take off scheme; it picks the sync off
after the contrast control, after the video output stage in fact.
Bending and "flagging" with an overly strong signal or high contrast is generally just part of the charm of such early designs. Does it straighten up if you reduce the signal strength at the antenna input?
To level the picture you rotate the yoke. There has to be something to loosen so the yoke can turn, then you tighten it again.
On the low sound, have you replaced C4, the little 4 mfd electrolytic that connects to pin 2 of V9 (the 6T8 tube)?