The stereo has not been operated for many years. When I turn it on, it took several minutes to begin to operate in a poor state. The left speaker circuit was only static. I switched the R & L wires and the problem also switched to the other channel. Therefore, the speaker circuit were OK.
I suspect many of the larger Capacitors need replaced. I have 8 electrolytics and 15-20 paper base(200-450v) in the circuits. I also have 2 tubes that obviously need replaced.

The tube tester I am using is a "MURCURY" Model 990.

I worked on this stereo as a senior in HS (30 yrs ago) to fix the power supply. It has been many years since I been into the circuits.

I really appreciate your support and information. I have ordered replacement caps and 2 tubes this week. I told my wife 4 weeks ago I would have this up and operating to play an old collection of Christmas records by Thanksgiving. Well, another project I underestimated.

:Also....to add to what Billy said and what the rest of us have said before, tubes aren't often what cause trouble in radios and such. If you are in fact having trouble with your set, replace obvious dud tubes. Then check set performance again. If it improves to perfection (other than slight tonal characteristics associated with that circuit and its components), then the dud tube was likely your problem. If you still experience other trouble, however, such as distortion at all volume levels, or some other strange problem (one channel weaker than the other, thin bass in one channel, muffled treble in one channel), then you have component failure, which is the usual problem within radios.
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:Leaky or opening condensers (the two terms are diametrically opposit to eachother) cause distortion and other strange audio problems. They can cause crackling and irratic operation. Failing volume controls (bass, treble, and volume) can also cause sound failures within the set. They don't usually cause distortion. Drifting resistors can cause distortion, weak power, and sometimes strange audio changes (low bass or treble). Usually condensers are your first problem.
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:If you are in fact having trouble with the set, then it is wise to replace dud tubes and then check under the set. Replacing all of the tubes won't likely solve anything, as tubes are not likely your problem in the first place.
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:I guess, instead of writing all of this, I should simply ask you if you are in fact having trouble with your set, or if you are simply trying to obtain maximum performance from the set by replacing all tubes. As all of our comments suggest, however, replacement of all tubes won't necessarily benefit you in any way.
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:For some people, especially beginner radio enthusiasts, it is hard to accept the fact that you might actually have to get inside the chassis and replace components. After several tube replacements, however, if you're actually having trouble, you'll find that under the chassis is often where the real trouble lies.
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:Thomas