>>11422646revolutionary because of size and low energy consumption they don't require a filament like in Vacuum tubes that needs extra power to function (although the efficiency of the cathode-plate circuit is quite high) ... transistor work very well on low voltages while V.T. don't work so well on low voltages
one interesting thing about the early transistors is that they were very incosistent in terms of quality with lots of failures and low life... V.T. were comparatevely very robust this is why V.T. were still used in professional equipment even in the 70s
