| Author |
Message |
    
Wildrat
Advanced Member
Username: Wildrat
Post Number: 566
Registered: 12-2003
| | Posted on Sunday, January 01, 2006 - 12:18 pm: | 
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I have a Line Isolator. It was meant to go up at the antenna feed, but thee barrel connector broke, so I just put the antenna up. Do you think it will serve any useful purpose putting it on the coax going into the polyphaser. This is the coax feeding the antenna, not the coax going to the radio. If not where can I use it at? I bought it so I figure I might as well use it some where.
Wildrat
CEF674
EGCCC |
Tech808
Moderator
Username: Tech808
Post Number: 8833
Registered: 8-2002
| | Posted on Sunday, January 01, 2006 - 12:26 pm: |
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Wildrat,
You are making things very hard with your installation.
KEEP IT SIMPLE and IT WILL WORK.
The more things that you add inline that you do not need gives you MORE CHANCES of having MORE PROBLEMS.
Hope this helps,
Lon
Tech808
CEF808
N9OSN |
Wildrat
Advanced Member
Username: Wildrat
Post Number: 569
Registered: 12-2003
| | Posted on Sunday, January 01, 2006 - 4:06 pm: |
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Oh I know Lon. I am just trying to get rid of complaints about interference before they start. I have bad neighbors, of course in their mind I am the bad neighbor. Just trying to stop something before it starts, plus I was remembering the problems Bruce had/has with some of his interference causing neighbors. Bruce lives just a few miles South of me, so those people are between Bruce and myself. So anyway Thanks Lon for the advice, and I went ahead and connected it without the Isolator already.
Wildrat
CEF674
EGCCC |
Road_warrior
Senior Member
Username: Road_warrior
Post Number: 1109
Registered: 7-2004
| | Posted on Sunday, January 01, 2006 - 8:34 pm: |
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Those R W line Isolators should be mounted
near your antenna for best results.
But, you may not even need it in your
system and i would not even bother using
it since antenna is already up.
JIm/PA/CEF 375 |
Kid_vicious
Advanced Member
Username: Kid_vicious
Post Number: 969
Registered: 9-2004
| | Posted on Sunday, January 01, 2006 - 9:40 pm: |
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if what you are talking about is a long tube with SO-239's on either end, then it might be a common mode filter. if so, it should be connected as close to the antenna as possible, because the common modes will flow down the coax until they reach the filter.
i have no technical basis for this, but the one guy i know who uses one puts his right at 102" below the antenna feedpoint. he says this is the best way to use them.
i have known this man to be right about a lot of stuff, but he still cuts all his mobile antenna coax to 18', so go figure.
hope this helps,
matt |
Wildrat
Advanced Member
Username: Wildrat
Post Number: 573
Registered: 12-2003
| | Posted on Monday, January 02, 2006 - 12:47 am: |
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That's what it is for common mode and to help with TVI. Yes it should have been installed at the antenna feed but the barrel connector broke and I did not feel like coming in and getting another one, if it had been in the morning I would have walked in and got another one, but it was around 4pm. I was past my quitting time for my back, so I said the heck with it. Now, I want to use it since I bought it. You never know I may have to tilt the tower then I can put it on. Pat00 and myself kinda had doubts that it could deal with what was going to be threw at it anyway. So till next time!
Your beloved,
Wildrat
CEF674
EGCCC |
Road_warrior
Senior Member
Username: Road_warrior
Post Number: 1118
Registered: 7-2004
| | Posted on Tuesday, January 03, 2006 - 12:11 am: |
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Wildrat,I tried one of Jims Line Isolators.
Did NOT place it near antenna like i should
of, so, it was not effective for me. It stopped
for a short period of time, then started again.
You have a good chance of not causing RFI
problems because your antenna is very high.
In my case, i gave up and bought another type of antenna. 2 years of fighting RFI problems with the Imax was enough for me.
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Kid_vicious
Advanced Member
Username: Kid_vicious
Post Number: 979
Registered: 9-2004
| | Posted on Tuesday, January 03, 2006 - 1:05 am: |
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if someone could open one of these up, id be very curious to see if it is nothing more than a bunch of steel wool packed around a coax jumper.
they seem quite expensive.
matt |
Wildrat
Advanced Member
Username: Wildrat
Post Number: 585
Registered: 12-2003
| | Posted on Tuesday, January 03, 2006 - 10:34 am: |
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I started reading RW's book they sent me with their T-4 Line Isolator says to install the Isolator at the output of the trans-match, if no trans-match the output of the Linear, if no Linear the out put of the transmitter. I guess I'll be fine then if I connect it at my amp, a lot easier than putting at the antenna feed. Maybe the imitations are full of steel wool, this on has 100% RF reducing rat hair. Rat hair proven time and time again to reduce RF. It is even better if you have live rats living around your coax. It has been found that after the introduction of living rats to the area of your coax has cut RF to nearly 0% just after a few months. My Isolator was pricey considering it's nothing more than a coil. I could have made one, but at the time I was feeling decrepit, and by the time I bought PVC, connectors, PVC caps, found some suitable coax, PVC glue, the trouble in making it, I could have bought one and I did.
I just want to get rid of the interference before I turn the station on and the neighbors start complaining.
Wildrat
CEF674
EGCCC |
Road_warrior
Senior Member
Username: Road_warrior
Post Number: 1120
Registered: 7-2004
| | Posted on Tuesday, January 03, 2006 - 10:34 pm: |
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I understand where your coming from Wildrat.
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Al_lafon
Intermediate Member
Username: Al_lafon
Post Number: 137
Registered: 3-2005
| | Posted on Wednesday, January 04, 2006 - 11:06 am: |
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Imax Frist thing we need to do if you are having
TVI is find whats making it the radio the amp
the antenna also if you want to run a Line Isolator your antenna must be not grounded at its
mounting point use PVC pipe here cut it down its
sides then tape it over the mast mount antenna then you place your Line Isolator as close as you can. But don't forget to ground the coax as
close to real ground as you can. |
