What does the word pitched end in ch ed or ch?

The phrase "pitched end" is not a common or standard term in either "ch ed" or "ch." It's possible you might be misremembering or mishearing the phrase.

Could you please provide more context? For example:

* What were you reading or listening to when you encountered this phrase?

* What subject or topic is related to this phrase?

With more information, I can help you understand what the phrase might mean.