Even with the tubes removed you still have the potential to do some serious damage. If you do it wrong and plug it into 220, you could have twice the normal DC voltage in the amp. That means twice the normal DC voltage across the filter caps. In my amp that would mean going from a B+ voltage of about 500 volts to 1000 volts. This is sure to be more than the maximum rating and since electrolytic capacitors tend to explode when they have too much voltage across them, you may have a real mess. No telling what else would be destroyed. Perhaps you.
Marakanetz, you seem to know just enough to be dangerous. I mean that in the nicest way. I admire your inquisitive nature and your desire to improve your system. But you are going into areas that will result in disaster unless you know what you are doing. Perhaps you could get some textbooks on basic electronics or take some classes at a community college. Once you have a better understanding of what is involved then you will be better equipped to redesign your amp.
Marakanetz, you seem to know just enough to be dangerous. I mean that in the nicest way. I admire your inquisitive nature and your desire to improve your system. But you are going into areas that will result in disaster unless you know what you are doing. Perhaps you could get some textbooks on basic electronics or take some classes at a community college. Once you have a better understanding of what is involved then you will be better equipped to redesign your amp.