Upping the power changes the balance , if you really need to fiddle with it improve the antenna for a boost both ways and at no additional running cost .
>From: "Tony L." <[EMAIL PROTECTED]> >Reply-To: Repeater-Builder@yahoogroups.com >To: Repeater-Builder@yahoogroups.com >Subject: [Repeater-Builder] Effects of doubling RF output on UHF repeater? >Date: Mon, 05 Feb 2007 14:47:34 -0000 > >One of our 70cm Amateur Radio repeaters is currently outputting 50 >watts into the duplexer. We're considering replacing the existing RF >power amp with a 100 watt model. > >Current draw on the 50 watt unit is 8 amps. The 100 watt unit will >draw 20 amps. Our power supply is rated at 36 amps continuous, and >the duplexer is rated at 250 watts. > >Half of our users believe that the repeater's output power is >perfectly matched to its receiver. That is, users of high powered >mobile radios generally lose repeater reception at about the same >time the repeater's receiver loses them. > >However, the other half of our users believe doubling the repeater's >power output would generate increased activity since the repeater >could be heard more "comfortably." > >We could upgrade without changing any of our other infrastructure. >However, these questions arise: 1) Will the hundreds we pay to >upgrade actually translate into significantly increased range? 2) >Will we risk generating additional receiver noise by doubling our >output power, thus losing coverage in the process? 3) Will using a >higher power level shorten the life of other system components over >time (e.g., power supply)? > >By the way, our frequency coordination would be valid even if we >doubled our output power. > > _________________________________________________________________ Advertisement: 50% off on Xbox 360, PS and Nintendo Wii titles! http://www.play-asia.com/SOap-23-83-4lab-71-bn-49-en-84-k-40-extended.html
