the vhf has 140 - 160 1.7:1 end to end and 144- 156 mhz 1.3:1 ,
uhf had , (collar down) 420 -440 1.4:1 end to end , and 430 -438 1.3:1
, ( collar up) 440 - 470 1.7:1 end to end , and 441- 449.800 1.3:1
checked witha 5 watt HT and the swr meter attached to the antenna , and a
2 ft jumper from meter to HT
Russ
N3TIH
----- Original Message -----
From: "skipp025" <[EMAIL PROTECTED]>
To: <Repeater-Builder@yahoogroups.com>
Sent: Tuesday, April 06, 2004 4:43 PM
Subject: [Repeater-Builder] Re: Ringos, Diamond, Comet & Hustler Antennas
> > "Admin" <[EMAIL PROTECTED]> wrote:
> > i picked up a workman uvs-300 for $55 , its the
> > same antenna as the diamond XMa-510 , 11.3
> > db on 440 and 8.5 db on 144 , and so far we have
> > thrown up to 50 watts uhf into it and have
> > worked 440 machines about 100 miles away
>
> Have you checked the bandwidth of the antenna? The
> Fc of the last Diamond DB ant I checked was about
> 446.3Mhz. The reflected power at 440.000 was in
> excess of 2:1 Our Repeater Tx's are on the low
> side of the band.
>
> 2:1 is not a value we choose to use for a repeater
> Tx antenna.
>
> > we have a GE progress line uhf repeater ,
> > and it had a bad TX strip , it puts out about
> > 3/4 to 1 watt into a phelps dodge duplexer
>
> This is a recipe for big time trouble...
>
> > ..and well that eats power , and still feeding the antenna
> > with the same rg 58 , the output after the cans is
> > milliwatts ,and feed milliwatts through rg 58 , i know
> > stupid , that repeater with that uvs 300 antenna , has
> > a 9 mile talk range to mobles in the hills and
> > base radios at almost 12 miles , on milliwatts.
>
> Most people are surprised to learn how well small amounts
> of power work. When Taxi cab company rf power amplifiers
> fail, I'd often run them on the 150mW exciter for a day. From a
> large building or nearby mountain top, 10 mile radius temp
> coverage was pretty easy.
>
> > I recomend this dual band base antenna to anyone, I
> > know it hasn't had a popular review , but I still bought
> > one and it has out done any antenna i have built or
> > purchased hands down, so if your looking for range
> > on a low power setup, this is a way to go.
> > Workman UVS -300
> > 200 Watt Capicity
> > 239 mount , not an N unfortunately
> > 17.6 ft tall 3 piece fibre glass
> > adjustable ground plain sleeve
> >
> > I hope this will help in anyone's ideas for repeater
> > or base antenna
> > Russ
> > N3TIH
>
> If you have a chance to measure the antenna bandwidth,
> report back with your results. We're always interested
> in other antenna options.
>
> Cheers,
> skipp
>
>
>
>
>
>
> Yahoo! Groups Links
>
>
>
>
>
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