"DC Grounded", in my experience, means the center pin and the coax will show a "dc short" when tested with a DMM.
Lightning? Corrosion? Manufacturing defect? JS > -----Original Message----- > From: Repeater-Builder@yahoogroups.com [mailto:Repeater- > [EMAIL PROTECTED] On Behalf Of Cort Buffington > Sent: Monday, October 20, 2008 11:29 AM > To: Repeater-Builder@yahoogroups.com > Subject: [Repeater-Builder] UHF Repeater Antenna -- UPDATE > > Folks, > > *Continuation of Previous Thread: UHF Repeater Antenna Discussion* > > We climbed the tower on Sunday and checked things with the wattmeter > between the Feedline and the antenna. > > At the bottom, we were making 75 Watts at the duplexer output. At the > top, after going through 105' of LDF4.5-50A (just over 1dB of loss), a > PolyPhaser, and a 6' jumper of RG400 (from the duplexer to the > PolyPhaser) we were seeing 57 Watts. I show that as about 1.2 dB of > loss, which seems quite reasonable. The F10, at the top, showed me > about 1.5W reflected... or 1.34:1 VSWR. > > The antenna is a DC grounded colinear, and we showed no measurable > (with my DMM) resistance between the center pin and outer conductor of > the Hardline/Antenna combination. > > Right now, we're of the mind that the feedline is good. > > 73 DE N0MJS > > -- > Cort Buffington > H: +1-785-838-3034 > M: +1-785-865-7206
