1 Jun
2015
1 Jun
'15
10:42 a.m.
Thinking about
it, I find it surprising that on later disk drives -- RL's, RK07s,
R80s etc, they used bulbs and not LEDs. By that date LEDs were easily available and
reliable.
I think it was just harder to replace the construction where you had
push buttons with lamps. Those are not bi-pins.