Scott 222 B tube amp

You did well on the price!- properly refurbished they can be quite nice sounding. However unless you have it on good information that the unit has been recently serviced, I would not run it until you have the power supply rebuilt with new filter caps and have the unit checked over, else the power transformer could be damaged.

With a new set of filter capacitors and other relatively minor service issues taken care of, you can expect the amp to be reasonably reliable for another 20 years or so.

We've been doing a lot of work like this in the last few years but anyone familiar with servicing tube amps should be able to take care of it. I would allow for at least $200 to get things taken care of, although it could go higher than that if the tubes have to be replaced.

The process of re-forming caps does work; the problem you may well run into is the fact that quite often the caps have dried up over the decades as they are not perfectly sealed. In some cases if you look at the bottom of them, you may find that they are bulging- you can count on these to form up properly about as much as you can count on a bulging tire on your car. I would only attempt to re-form a cap that shows no sign of damage due to age or heat.

The half life of filter caps in round numbers is about 20-25 years, which is to say that in that time about half of them will have failed. In an amplifier like this that is more like 50 years old, harboring the idea that some of the filter caps might still be good after that time is simply asking for trouble.