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Okay here it goes. I pulled the tube compliment chart out of the set for reference.
121-447 : Noise amp
121-745 x2 : 1st Video Amp and Brightness Limiter
121-744 : 2nd Video
121-499 : AGC
121-587 : Blanker
121-746 : 3rd Video
Now, the 3 video outputs transistors are labeled 121-828 on the chart but are actually 121-743's.
Even though I tested em all earlier, I sprayed em all just now one at a time and it didn't clear up the issue. I don't know, one moment it was plenty bright then suddenly went out. I still think it's a bad connection somewhere.
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