[morzh]

I was able to repair one by scraping the carbon out of the burnt track, then using clear epoxy (not J-B Weld, it is conductive) to reinforce the area where I had to scrape carbon out.

I was about to suggest the same. This is the way I used to repair burnt tracks, scrape and fill with epoxy.


Oh.....and before you replace the tube, test it, first on a tester and then, if passes well, on another radio. Just to make sure it is not the radio that makes the tube glow.