How many feet of 7/8" line? How high is the antenna? We try to avoid tower mounted preamps at work due to the trouble servicing them. It requires a tower climber to get to it, and then you hope that he knows how to service it. 7/8" cable should have less than 1dB of loss per 100 feet at 450Mhz. If it is a short run of cable, you would be better off putting the preamp where you can get at it, especially since you have paging interference. You will probably want to put a preselector filter in front of the preamp, if you tower mount the preamp the preselector will also have to go on the tower top.
It can be done, but you really need to know what filtering you need to do before you put it on the tower top. TX/RX makes nice ones: http://www.txrx.com/ but very expensive. TX/RX had one that has redundant preamps and a bypass mode, big bucks but allowed you to switch in a backup preamp or completely bypass the preamps entirely. Also, if you have a preamp tower mounted without the bypass mode, it makes antenna troubleshooting difficult. 73, Joe, K1ike At 02:46 PM 12/18/2005 -0600, you wrote: > Speaking of UHF preamps, does anyone have any experience/recommendations >for tower mounted preamps? Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
