In uk.d-i-y, Edwin Spector wrote:
I have just done some measurements, and it hardly makes a gnat's cock of
difference!


[ ... ]

Conclusion: Yes, there's a measurable difference, but it's damn small. As
someone else said, you'd have a very marginal reception to notice any
difference.

Ah yes, but think of the pride in workmanship ;-) But thanks for injecting
real data into the speculation. RF folklore doesn't travel all that well
from its original context; so for radio-hams and wannabes pushing 100W of
ERP up coax, and needing to be sure it's going only where it's supposed to, a
degree of paranoia about cable/joint integrity creeps in which isn't
necessarily relevant to broadcast signal reception in non-marginal areas.

Cheers, Stefek