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You might want to check resistors too. If any are open or far enough off tolerance, then various problems may result.
Could you give more specifics of your work so far such voltages measured (tube #s with a chart of pin#/schematic voltage/measured voltage), what equipment you used to check caps, and tubes, which parts you have replaced so far, and when you did it relative to the manifestation of the current problem?
The more you tell us the more likely we are to find the problem, or some oversight or error on your part that you'd never notice....Heathkit used to advise people having troubles in their build manuals to 'have someone else not familiar with your work check it over to see if there are any errors you may be unconsciously overlooking'.
And please don't take Wiscojim's comments as picking on you. He is a nice person, and I know he means well. He does raise a good point: starting only one thread per forum on a given set collects all the recorded work history in one place, and makes it easier for us to know exactly what you're dealing with (which will improve the quality, accuracy, and relevancy of the advise you get). Most of us are too lazy to search for a handful of old threads on a set (which we may not remember or even know exist) to get history or specifics that you have already posted (and then we'll end up asking you to repost that info thus wasting your time needlessly).
Also to regular readers on this site multiple threads on the same thing can come across as spam-like (an undesirable way to come across on any web forum).
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