thank you for the useful info!
i guess i can make my own vehicular repeater from two spectras and a portable
duplexer...thank you very much!
--- In Repeater-Builder@yahoogroups.com, "skipp025" <skipp...@...> wrote:
>
>
>
> Re: what pac-rt means
>
> > "George" <gueorgui@> wrote:
> > thank you! that means that the setup has no repeater
> > device built in. just a switch that enables external
> > repeater (different device)
>
> Yes, and in some cases the switch is an option on the
> main radio, Convertacom or via a plane-jane switch mounted
> on a panel. The actual extender (repeater) lives in the
> trunk or under the seat near the main radio chassis (unless
> you have a dash mount radio). The extender hardware is
> most often within 6 to 8 feet of the main radio chassis,
> where ever it is...
>
> And the extender - vehicle repeater is not a true duplex
> stand alone box. The extender is actually just a specialized
> half duplex (normal) transceiver, when connected to the "main
> radio" operates with... in duplex operation. And the
> resultant duplex (repeat) is from both the extender and main
> radio (and can be the same or cross band).
>
> In the early days...
> T'was hard for many mfgrs to make an in-band (same band)
> extender work well with some difficult frequency parings.
> Using different frequency ranges ("bands") for the extender
> solves/solved a lot of the in-band desense issues.
>
> But in-band extenders work very well if you have the right
> frequency spacing and RF Cavity Filtering (protection) in
> place.
>
> s.
>
