--- In [email protected], Ken Arck <[EMAIL PROTECTED]> wrote: > > At 11:38 AM 6/27/2007, you wrote: > > >I run one in the same fashion on my other UHF repeater, but there's > >400+ feet fo 7/8 feedline so I figure thats enough of an attenuator > >by itself ;) >
Sure, that's an attenuator, but directly reduces your receive sensitivity, db for db, as any loss before the first active element in the receiver does. To eliminate overload from a preamp, a pad of maybe 6-10db is added AFTER the preamp, where it does NOT reduce receive sensitivity, but only the overload. > <---Let's see.. Andrews 7/8 air dialetric is spec'd at .845 dB loss > /100 feet at 450 mHz. That's over 3 dB loss and over 3 dB of noise > figure added to the system for a 400 foot run. > > Well, we all do what we gotta do <g> > > Ken Very true there Ken. Laryn K8TVZ
