[old_tv_nut]

A 1970 paper by Norman P. Doyle of Fairchild semiconductor compared three types of transistor subcarrier regeneration circuits: PLL, injection lock, and ringing. Tube circuits should have similar performance if designed using similar parameters.

For 100 Hz frequency offset, the PLL phase shift was approximately 3 degrees, the injection lock approximately 16 degrees, and the ringing circuit approximately 34 degrees. At 200 Hz, the numbers were approximately 5, 30, and 65 degrees, respectively. Note that +/- 5 degrees was the generally accepted tolerance for hue stability that would not prompt customer adjustment.

I estimate the shift I saw on the color chart was at least 45 degrees.

Of course, these numbers could vary with design, but not too extremely, because of the need to control other characteristics of the circuits like noise bandwidth and pull-in range.