Quote:
Originally Posted by Phil Nelson
Speaking of over-engineering, the TV has a time delay circuit to reduce surge. See the 6AL5 tube, V224, and K201 in the schematic.
From the service manual:
The relay circuit has been designed so that the relay is energized approximately ten seconds after the power is applied to the television receiver. In this way all capacitors and other components are protected from the high surge voltage which otherwise would occur before the tubes heated up and started to draw plate current.
Some of my later sets use a thermistor, instead. Maybe they didn't exist when this was designed (?).
Phil
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WOW! I did not spot that... a 10 second delay should take care of *most* of the surge. These folks were serious !
jr