[RFI] TVI filters

[Andy]

> As a former Director of Engineering for Comcast, the most prevalent form of
> ingress occurs through loose F-connectors, most of which are properly
> crimped.  That, followed by improperly-crimped connectors as Jim point out.
> Even the slightest amout of a loosening of an F-connector will allow
> ingress.  Nearly every cable technician keeps a 7/16" open wrench in his or
> her back-pocket.  It gets grabbed in the morning as s/he dresses.<g>

Interesting, since the Comcast techs up here regularly replace proper
F-connector cables, with the non-threaded push-on variety to make it easier,
at least for the cable box to TV connection (jumper cable).  Of course that
connection doesn't carry the wideband signal, it's only one channel, so the
problem is probably less severe.