|
What's funny is that all the early solid state color sets seemed to have instant on, on the CRT filament...the picture did indeed appear the moment the switch was turned on, but it really only takes 10 sec or so for the CRT to warm up. Seems like a gimmick to make the solid state set appear even more dramatic in coming on quickly.
The series string tube type sets usually used the diode but the solid state sets usually used a 4 volt constantly powered standby filament transformer whose secondary was wired in series with the main transformer filament winding, which then added 2 volts to give the CRT the full 6 volts when the power was switched on. I have rewired the power line circuitry in these sets to put the standby transformer on the normally open side of the power switch to defeat the instant on.
The RCA XL-100 sets with this feature often did not include a defeat switch.
|