Quote:
Originally Posted by wa2ise
The flyback transformers used six windings, and 3 diodes to create the very high voltage for the CRT. They thought they could get away with just the 3 diodes, cheaper. Wrong! The terminations of the windings and diodes were a stake style, which created electrostatic stress points. Had they used 6 diodes, one diode per winding (winding-diode-winding-diode-winding-diode-winding-diode-winding-diode-winding-diode) these stresses would have been half as intense, and the flyback transformer would not have failed. When they made the 6 diode flyback, they used a different color epoxy than what they used in the 3 diode flybacks.
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The diodes would certainly explain it. I do know that a lot of them failed in warranty and that RCA fixed it immediately. Once they did, I cannot recall any integrated flybacks failing until the 177 and 195, and even those were rare.
I did warranty work for RCA in the 80s, and until the 140 went into production in the late 80s (1987?), we had gone many years without making a single claim to RCA for warranty work. When the 140 came out, we had a couple of issues with them (GREAT performer) and we had to call RCA to get the procedure to submit claims.
John