How about a thread how the sawtooth sweep waveform is generated..?

[dtvmcdonald]

Originally Posted by Electronic M

Somewhere buried in one of the sites dedicated to early color is one of the best descriptions of the synchroguide circuit I've seen.

Indeed. When my CT100 had a horizontal intermittent I looked
at scads of those, all the URLs now forgotten. That and lots
of testing with a scope never found the problem, the circuit is
too complicated and feedback-y. Nor did doing simulations. The problem
was solved by replacing ALL the resistors in or directly adjacent
to that circuit. One was bad at high temps and/or voltages. Testing
all the old ones with an ohmmeter and heat gun didn't find a bad one.
The caps had already long been replaced, along with two
resistors (replaced again).