Yes, I was using the Top Half of a 4-element antenna. I have now added the 3-Way connector and now have the entire antenna connected. I have noticed it has cleaned up the receive on week stations but, it seems to have dropped a little in the signal.
System was just re-tuned, duplexers and radios. It's a Motorola MSR-2000 Canadian 40 Watt version. When I add the duplexers and the top half of the antenna I get 25 Watts out. When I add the second half I get 10 Watts out. Measuring the wattage just after the duplexers. I guess we will see how well it works? The antenna is somewhat at a good height. It's on a 55' tower on a hill overlooking the City. I wish it was a little higher however, that is not possible at this time. Thanks Aaron VA6AE --- In Repeater-Builder@yahoogroups.com, "Steve Bosshard (NU5D)" <[EMAIL PROTECTED]> wrote: > > Depending on the degree of coupling, at VHF, the loss in 2, 8" cavities will > be around 1.5 dB., send or receive. 10 LOG 25/42 comes to around 2.25 dB. > A little on the high side. I don't understand where adding the remaining 2 > elements to a 4 element antenna will change the loss. > > Seems the repeater delivers 42 Watts. The Duplexer adds 2.25 db of loss. A > 2 loop antenna will have around 3 dB of gain, and a 4 loop antenna should > have around 6 dB. of gain. Adding the second 2 loops should help the send > and receive by around 3 dB. > > I am making the assumption that you are now using the top half of a 4 > element antenna, and you plan to re-connect the bottom half? > > Steve NU5D > > > > On 5/30/06, KB6ZOP <[EMAIL PROTECTED]> wrote: > > > > That seems like a LOT of loss... Have you had the cans and antenna(s) > > tuned? > > > > -----Original Message----- > > From: Repeater-Builder@yahoogroups.com > > [mailto:[EMAIL PROTECTED] On Behalf Of atms169 > > Sent: Monday, May 29, 2006 9:46 AM > > To: Repeater-Builder@yahoogroups.com > > Subject: [Repeater-Builder] Double the gain or double the power? > > > > Easy question for all other repeater owners. What should I do? > > > > I have a pair of folded looped-dipole antenna's for my repeater which > > pushes 42 Watts. Once I add the antenna and duplexers I get 25 Watts > > output. The antenna has 4 looped-dipole antenna's with phasing > > harness but I only use one set. > > > > So what should I do, should I continue using the 1 set of > > looped-dipole antenna's at 25 Watts or do I add the second pair of > > looped-dipole antenna's and push only 10 Watts out on the repeater (As > > there will be a loss). > > > > Which would be better? I am sure I am doubling the gain for PEP. > > Would I have a better receive on the antenna as well? Would it really > > make it stronger? > > > > Aaron > > VA6AE > > > > > > > > > > > > > > > > > > > > > > Yahoo! Groups Links > > > > > > > > > > > > > > > > > > > > > > > > > > Yahoo! Groups Links > > > > > > > > > > > > > > > > > > > -- > Ham Radio Spoken Here.....NU5D > 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/
