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New to GMRS

New equipment repeater

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#21 Logan5

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Posted 22 May 2013 - 12:05 PM

offer him 50 bucks for the duplexer alone. and add to a sm50 twin repeater from ebay seller for 229.00 and your in better shape than mine.



#22 JeremyM

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Posted 22 May 2013 - 12:06 PM

Awesome, I just might do that! Thanks again!


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#23 JeremyM

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Posted 22 May 2013 - 01:00 PM

I asked how much he would take for just the Celwave. He wants $25 for it. Regardless of whether or not it has the cables or needs to be tuned, that price is a steal! Of course I told him I would buy it. Looks like I just need to get my radios, wire, and antenna.

 

Any recommendations?

Now that I have a duplexer I am thinking of getting a DB400 series antenna. I have been looking at the 404, 408, and 420 if I can get a used one for a good price.

 

I have decided to take another approach to building this repeater. I am going to build from the antenna down. I will slowly buy my antennas choosing the right ones. I now have a decent duplexer and my buddy says he is pretty sure he can tune it.

 

Correct me if I am wrong, but what I glean is: height, antenna, and leadwires are the most important components in any base station or repeater. The radios are important and getting good quality is necessary, but the best radio on the market will be crippled with poor antennas and leads.


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#24 PastorGary

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Posted 22 May 2013 - 02:40 PM

Jeremy - That's true... as the old saying goes, "you can put lipstick on a pig, but it's still a pig."   Put as much as you can into the outdoor items and then. whatever you decide on indoors will work to it's utmost potential.


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#25 JeremyM

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Posted 22 May 2013 - 03:57 PM

Other than the ones I have listed, any other antenna you would recommend in case I can't find a good price on those?


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#26 JeremyM

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Posted 22 May 2013 - 04:02 PM

Sorry to post rapid fire, found this and wondering if I should get it? It looks like it is directional, probably not what I want.

 

http://www.ebay.com/...=item3cce2f2f1e


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#27 Logan5

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Posted 22 May 2013 - 04:14 PM

Yagi's are awesome, directional, high gain, add a rotor or create a "lobe": that suit's your needs. I have seen this e-bay listing, hard to be sure if it's electrically sound, w/o testing it. if you get something used like this make sure to refurbish b4 you put into service. make sure is water tight. Take this into account as any savings or cutting corners may lead to additional work or climbing the tower again in the near future.



#28 JeremyM

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Posted 22 May 2013 - 04:17 PM

Ok, so to my next question: Directional or omnidirectional? I am trying to cover as much area as possible so I assume omnidirectional is best for my application unless I plan on building an array, which I do not.


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#29 JeremyM

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Posted 22 May 2013 - 04:24 PM

Also, there is this one. It is new, not top of the line, but most of knowing how well this stuff works is in the experience.

 

http://www.gigaparts...CFUyY4AodUWMAdQ

 

Edit: Scratch this one, not in the right range.


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#30 Logan5

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Posted 22 May 2013 - 04:32 PM

I do not own a comet, but it has similar specs to my workman UVS200, on mine the radome is made of fiberglass tube and I have been warned many times that in high winds this get's damaged and allows water to leak in. needless to say I prepared the heck out of it with waterproof rubbery stuff. If it's two part. make sure all connections are tight. tight water tight. use the rubbery stuff.



#31 JeremyM

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Posted 22 May 2013 - 05:14 PM

Yeah, that specific antenna was rated for up to 450MHz so unfortunately it would not work for GMRS since it is in the 460-470 range.


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#32 Logan5

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Posted 22 May 2013 - 05:33 PM

yeah, you may wish to get a yagi tuned to the freq. that you want. don't chance it and consider "NEW" or like new, and still spend lot's of time, prepping connections. when you deploy an antenna, the last thing you want is to already need to redoit.              FYI: Higher Freq. equals shorter elements, easier to file off a little extra than to add.



#33 JohnE

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Posted 22 May 2013 - 05:42 PM

http://www.tessco.co...2&subgroupId=37

http://www.tessco.co...2&subgroupId=40


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#34 JeremyM

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Posted 22 May 2013 - 05:42 PM

Wouldn't a yagi be more directional than omnidirectional?


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#35 JeremyM

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Posted 22 May 2013 - 06:17 PM

http://www.tessco.co...2&subgroupId=37

http://www.tessco.co...2&subgroupId=40

 

Awesome! Using that site (registered) I found 2 antenna that matched my criteria. Anyone know anything about these two?

https://www.tessco.c...678&eventPage=1

https://www.tessco.c...782&eventPage=1

 

This one might work too, but it is directional.

http://www.tessco.co...459&eventPage=1


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#36 JohnE

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Posted 22 May 2013 - 06:27 PM

I use these a lot my 650 has the 7dB and the 575 has a 5dB. light weight relatively cheap.

this is my preferred yagi for control stations on master systems.

http://www.tessco.co...145&eventPage=5

I have a pair of these I keep for my own use.

http://www.tessco.co...400&eventPage=5

35005.jpg


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#37 JeremyM

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Posted 22 May 2013 - 06:30 PM

Very nice, I will have to house-mount mine until I can build a tower. I live in a rural area and in a house, so no nice tall buildings for me!  :(


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#38 PastorGary

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Posted 23 May 2013 - 06:46 AM

Just a thought, but if you know someone that works for the power company, they "sometimes" make utility poles that are being taken out of service, available to the public free or at very little cost.  Some still have the metal climbing spikes inserted and those are easy to climb with appropriate safety gear.   A ham here locally got one that stands 35 feet above the ground. He attached a triplex standoff bracket with each leg 5 feet out from the top of the pole and one piece of 1-3/4 inch thick wall mast to the top center of the pole.  This allows him mounting points for at least 4 antennas.  He ran # 2 gauge ground cable from the brackets to a ground rod next to the base of the pole and is quite satisfied with the operation of everything.

 

Here is just one of several discussions about the subject. Pro's and Con's are discussed -

 

LINK >>>  http://www.eham.net/...p?topic=61495.0



#39 JeremyM

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Posted 23 May 2013 - 08:09 AM

My wife might have lowered my "high expectations". She is not exactly keen on having a tower in our yard. I live on 3/4 of an acre, so not too big, subdivision, no HOA though. Still, if neighbors complain I would have to take it down and I don't want to put all that time and effort into building a tower just to be told I had to remove it.

 

I am thinking my best bet is to put the antenna on the side of the house, like a satellite dish mount. This is going to severely reduce my range, but at least it will be something to play with. Since a repeater would not be very usable at that elevation, I am wondering if I shouldn't just build a base station instead with a high gain Yagi antenna.

 

Really stinks cause I purchased the omni antenna yesterday... Got a good deal on a 7dB gain Laird fiberglass, paid $150. But for the same price I could have gotten a 10dB gain Yagi. Then put it on a pole with a rotor and used a ground plane to hone in on signals.

 

Am I starting to give up on the repeater too soon? Do I have other options available to a hobbyist that I am not aware of? I don't have any more ideas right now, my little newbie brain lacks experience with this.


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#40 Logan5

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Posted 23 May 2013 - 09:55 AM

My repeater is only 20' above ground plane, even here in flat Florida I get good range. you live on a hill? you do not need a huge tower, just 6' to 10' above the roof of your house and or clearing most trees and vegetation. Yes a base station is a good second option, but don't give up on the repeater just yet. I obtained a "tilt over" telescoping tower, and my other half is not keen on a tower either, but with careful placement, it will be 90% covered by a tree canopy and eventually a fake palm trunk from the base up into the canopy. the only part that will show will be the top few feet of tower and the antenna on top of that. since it's telescoping I will be able to lower it so just the antenna rises above the tree line. get creative.  in a wooded area, done correctly a 40' to 50' tower can be made mostly stealth. Don't worry about money spent on a good omni antenna, work with it for now and get a yagi for a special occasion.







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