Vacuum tube to solid state

[DavGoodlin]

Early solid state applications in TV was sound stages then RF and IF, lower voltages.

One problem solid state TV avoided was use of germanium transistors. My WID Motorola sets use silicon transistors.

Aging and long-hours audio equipment using T0-3 package germanium output transistors will get loud enough but sound poor with hissing highs as if not tuned in.