Quote:
Originally Posted by ctc17
The sams talks about using a signal generator and feeding it into the horizontal of the scope as well as the set. Where does that come in? or does the bk do that?
You cut the grid pin off to killl the osc?
I was looking at the factory service manual on that zenith combo we both got and the alignment is totally different from the sams. They say put the tuner between two channels to kill the osc. (if i can remember ill take that book and photocopy it for you, i think you would enjoy it)
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The B&K does that it has a horz scope out but I dont really think its an issue.
My scope does not have a horz drive just a source for triggers. If your scope has a horz drive input then you can prob reverse the sweep direction, and get a mirror image. On mine the wave pattern was reversed from the direction shown on the B&K and I had no way to correct it. You just have to remember that, easy to tell by flipping the markers on and off. on mine the low side was on the right, while on the B&K is shown on the left.
Guess that makes since if the osc coil is shorted or open mid channel. Better than destroying a tube for sure.
Buddy of mine told me to install a ferrite bead at the end of my coax feed that attaches to the tube shield. I got one of those you find on some computer or VHS tape AC power leads, the kind that clips on.
also note if there is any resistors put in series with the TP's