First, has the system ever performed better than this at any time? My next statement would be, and yes they are right about the 9913, but I would have to say that 9913 has nothing to do with shield, as it is a very good shielded cable, just that is presents metal to metal type substance and therefore lets to much noise in, but this would not be an everyday, every minute issue for the system.
He is not far off on the distance either, I am up 130Ft in the air, 6 dB gain atenna fed with 7/8" hardline, pre-amp with filters, and 8 miles is best for the handheld radio for a signal that is acceptable to listen to.
Is this performance the same in all directions, or is one direction better than the other. How well is the hand held getting into the system? Are they noisey, or are they just not there? Are there spots that is better than others, location wise?
Next, is
there a possibility of taking the repeater to another antenna and hooking it up and doing some testing. Another quesiton that was not asked, and did not see mentioned, what is the power output of the hand held radios? Are they in a building, or are they outside?
Mathew
Vincent Caruso <[EMAIL PROTECTED]> wrote:
For starters dump the RG 8 Feedline and invest in some 1/2" or 7/8"Hard
Line (depending on distance btwn Antenna & Repeater)
Also what brand type of repeater is this?
[EMAIL PROTECTED] wrote:
> I'll try what Eric mentioned when I get a chance to go out to the
> site... as for now, I'll try to answer Mathew's questions...
>
> Antenna Height = 27.0m, rooftop tripod
> HAAT = 16.4, elevation gains going south but drops quite a bit going north.
> Gain = purchased an Antenex FG1523, 3dB Fiberglass Omni
> Feedline = RG8, mentioned 9913 when I went to the shop but the coax has
> no markings on it when I got it so I'm not quite sure if I got it or not :)
> Power of Transmitter = 50w, 35w after duplexer
> Duplexer = Sinclair MR256B*2 - Mobile Type, tuned by shop
> VHF-Hi, 152.8850 & 159.5400
>
> Thanks!
>
> -----Original Message-----
> From: Mathew Quaife <[EMAIL PROTECTED]>
> To: [email protected]
> Sent: Thu, 5 Jan 2006 18:47:36 -0800 (PST)
> Subject: RE: [Repeater-Builder] Repeater Assistance in Michigan.
>
> It would be helpful to know how high the antenna is, gain, feedline and
> power of the transmitter, and as Eric said, what type of duplexers,
> etc....Are we dealing with VHF or UHF?
>
> Mathew
>
>
> */Eric Lemmon <[EMAIL PROTECTED]>/* wrote:
>
> Since a repeater's range is limited *primarily* by its ability to
> receive,
> you should concentrate on those factors which directly affect receive
> sensitivity. One of the most common problems is the use of a
> duplexer that
> has insufficient isolation for the combination of transmitter power and
> receiver sensitivity. A transmitter PA that produces a "dirty"
> signal (one
> with spurs) coupled with a broadband receiver will require much more
> isolation than a pure-carrier tube PA and a very narrow-band receiver.
>
> Does the range improve if you reduce transmitter power to, say, 20
> watts?
> Does the range improve if you remove any preamplifier on the receive
> side?
> Does the range improve if you put a single bandpass cavity with 1.0
> dB of
> insertion loss between the duplexer and the receiver? Is the duplexer
> *known* to be properly tuned?
>
> 73, Eric Lemmon WB6FLY
>
>
> -----Original Message-----
> From: [email protected]
> [mailto:[email protected]] On Behalf Of kfd29
> Sent: Thursday, January 05, 2006 3:29 PM
> To: [email protected]
> Subject: [Repeater-Builder] Repeater Assistance in Michigan.
>
> Looking for assistance w/ a new repeater system in GR, Michigan...
> Could use
> a hand in finding out why we can not pick up 5 watt handhelds only 5
> miles
> out, maybe we missed something in setup? If anyone is knowledgable in
> troubleshooting repeaters or in the GR area, please contact me! Small
> business that can't quite afford the $70/hr charge for a tech right
> now lol.
> Thanks!
>![]()
Yahoo! Photos
Ring in the New Year with Photo Calendars. Add photos, events, holidays, whatever.
YAHOO! GROUPS LINKS
- Visit your group "Repeater-Builder" on the web.
- To unsubscribe from this group, send an email to:
[EMAIL PROTECTED]
- Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.
