'50 RCA KCS-47A Question

[Don Lindsly]

Ringing is usually caused by a mismatch. Note that the horizontal output transformer and yoke are in series, unlike most arrangements of the era. The lin coil, flyback and yoke must all match. Universal replacements for the flyback, yoke and lin coil rarely worked. Make sure you have RCA originals. The lin coil and surrounding components are critical. I discourage substitutes. When the lin coil is adjusted correctly, the width is at max and horizontal output tube current at minimum. That lin coil will have more effect than in conventional configurations.

If it has a green Merit HOT, you have probably found the problem.

Make sure the 500 mmf high voltage filter cap is OK.

Don