Interesting, I actually sent this out on the 5th. Between Yahoo & Bellsouth, who knows what bucket it was stuck in?
Fred N4GER -----Original Message----- From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of Fred Flowers Sent: Monday, February 05, 2007 10:00 AM To: Repeater-Builder@yahoogroups.com Subject: RE: [Repeater-Builder] Effects of doubling RF output on UHF repeater? 1) No 2) Yes 3) Probably not. Fred N4GER -----Original Message----- From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of Tony L. Sent: Monday, February 05, 2007 8:48 AM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Effects of doubling RF output on UHF repeater? 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. Yahoo! Groups Links Yahoo! Groups Links
