> -----Original Message----- > From: Repeater-Builder@yahoogroups.com [mailto:Repeater- > buil...@yahoogroups.com] On Behalf Of wd8chl > Sent: Tuesday, March 09, 2010 11:07 PM > To: Repeater-Builder@yahoogroups.com > Subject: Re: [Repeater-Builder] Dual receivers on one antenna for RX > only site >
> > > > > > It you are not combining the UHF and VHF signals with cavities then a > signal > > splitter should be used. Even a TV cable type splitter will work ok > for > > this. Don't worry about it being 75 ohms rather than 50 ohms. Without > a > > splitter one receiver can load the input of the other considerably > > (depending on the luck of cable lengths) if just a simple T is used to > > connect the antenna to the two receivers. > > > > I know of a system that has 2 VHF receivers tied to one antenna with a > 'T' connector and random coax-deliberately. At the T junction, the > receivers need *many* uV of signal...plus the squelch is all the way > tight. Too many problems with out-of-town junk on the input. So it has > many rx's and a big voter. > It proves your point-if you just use a 'T' connector, it'll be deaf as a > doorknob. In this case the receivers would benefit from a "splitter". That would make everything see 50 ohms regardless of cable lengths. Also the splitter 3 db loss per side will probably be less that what it is now as each receiver takes half the power to start with no matter if you have a splitter or not. 73 Gary K4FMX
