ANYTHING with a software tuned front end is considered broad when talking about hi-level rf site performance. That is why helical resonator front ends are desirable.
------ Original Message ------ Received: Thu, 05 Feb 2009 03:16:20 PM PST From: "Bob Ricci" <b...@af6d.com> To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Re: Hamtronics Helical Resonator Preamp orAdvanced Research Preamp > "...the receiver in this application has a very broad frontend..." > > Not quite. The radio is software tuned and aligned for the actual > frequency range in service. It is *capable* of the broad range of 134- > 174. That is not to say that a preselector won't help an already > excellent receiver, but a Angle Linear has already been ordered. > > --- In Repeater-Builder@yahoogroups.com, "motarolla_doctor" > <echoco...@...> wrote: > > > > Very good, excellent points Eric. I might add that the receiver in > > this application has a very broad frontend. You NEED a receiver > > preselector for best performance. > > > > "Eric Lemmon" ...> wrote: > > > Rick, > > > You made some very good points. I can offer two comments: For > > > hookups within the repeater cabinet, use RG-400/U coax instead of > > > RG-142/U. RG-400 has a stranded center conductor, while RG-142 > has > > a solid steel center conductor that breaks easily when repeatedly > flexed. > > > > > > Regarding the Vertex UHF repeaters, I corrected an in-cabinet > desense > > > problem by replacing all three internal jumpers- which were > unmarked > > > gray-jacketed single-shield cables- with double-shielded RG-400 > cable. > > > > > > 73, Eric Lemmon WB6FLY > > > > >
