1968 Zenith 20Y1C50 chassis - advice needed

[old_tv_nut]

Here's Zenith's 1981 patent for a symmetrical peaking circuit (analog bipolar IC) that also included a noise-coring capability. Transient amplitude was detected from the first derivative signal across the resistor, and low level random transients would not be amplified.

https://pdfpiw.uspto.gov/.piw?PageNu...D4%2C296%2C435