| Author |
Message |
    
Crackerjack
Advanced Member
Username: Crackerjack
Post Number: 611
Registered: 7-2004
| | Posted on Sunday, June 05, 2005 - 9:55 am: | 
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I just replaced my Vertical, due to wind damage.
When I did, I also replaced the RG-8 mini coax (a 50' run from radio to antenna) with RG213 95% Shield Coax that I purchased from Copper.
I realised an increase of 4 additional watts at the antenna base. That is measured watts, across a dummy load at the antenna base.
I see a similar increase on the Dosy Watt Meter, at my radio.
When we went live on the new antenna, there was also a drastic decrease in White Noise. Now I have no way of knowing if that is due to cable influience, or the new antenna -it is a direct and exact replacement of what I was using before. |
Patzerozero
Advanced Member
Username: Patzerozero
Post Number: 878
Registered: 7-2004
| | Posted on Sunday, June 05, 2005 - 9:38 pm: |
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depending on what the white noise was originally, possibly interference generated from power lines, or RF producing accessories, the 213's shield is probably CONSIDERABLY heavier then that of the 8X, & therefore allows less 'stuff' to sneak in through the shield, as well as less RF from your radio leaking out before getting to your antenna. yes, your watts leak out through thin braid & end up as interference-to the tv, stereo, your body, martian radio, etc.
there's a lot of discussion over coax length, but the real issue with coax is QUALITY. i've said it since the 1st TVI experience i had when using added power in about 1974 or 75. you CAN eliminate or at least decrease a LOT of interference problems, receive as well as transmit by using the ABSOLUTE BEST coax you can. even my mobiles use 9913 when i have amps in 'em.
IT MAKES A DIFFERENCE!!! |
Georgia235
Junior Member
Username: Georgia235
Post Number: 18
Registered: 3-2005
| | Posted on Monday, June 06, 2005 - 6:14 pm: |
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May I ask, what would you guys prefer? LMR-240, or the RG-213/U? At different times and on certain channels I get bad interference and not sure where it comes from. I'm also running more watts than what I used to and would like a lower loss cable. I've got someone that wants to sell me LMR-240, yet, I can buy myself RG213/U. Which would you guys go with? From what I understand, RG213/U is the same as RG213, but built to Military Specs.
Thanks! |
Tech808
Moderator
Username: Tech808
Post Number: 6012
Registered: 8-2002
| | Posted on Monday, June 06, 2005 - 6:30 pm: |
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Georgia235,
Honestly I have never seen any reason to spend the extra money for LMR and then end up burying it.
I have roughly 400' of S.I.W ~ RG-213 running from 4 different antennas Beams and Omni's and never had any problem's with Any Kind of interference.
And if you are not going to bury it then I see no need for the 213U.
Personally we have all of the Outside Coax that runs underground inside of PVC pipe which is much cheaper.
And it also allows us to change the coax or run another length of Coax thru the PVC Pipe and all we have to do is screw a double female connector on one end of the coax to connect it to the other coax and pull it through without having to dig it up or bury another piece.
Never had any critters chew thru the PVC pipe yet in the last 20 years and never whacked thru it with a spade or shovel. 
Just my personal experience,
Lon
Tech808
CEF808
N9OSN |
Crackerjack
Advanced Member
Username: Crackerjack
Post Number: 629
Registered: 7-2004
| | Posted on Monday, June 06, 2005 - 7:43 pm: |
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Tech808:
You never had Johnny Garcia cut your grass. LOL
He finds a way to cut through anything. He has done my TV Cable, my Telephone Line, and my Sewer line "clean-out" (and that was PVC). LOL....
"Hey, does this wire go to anything important?"
I run my antenna through pipe, when I can get it, PVC when I can't -for protection and for the convenience (as you said) of running a new cable through it, like conduit.
john-harbaugh@earthlink.net
"CrackerJack" CEF-358 |
Patzerozero
Advanced Member
Username: Patzerozero
Post Number: 894
Registered: 7-2004
| | Posted on Monday, June 06, 2005 - 8:55 pm: |
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georgia235, what 808 said! .
unless your antenna is 500' from the radio, 213 is sufficient. i've always used 9086, now 9913, & it's loss properties are minimally better then 213, at best. 60' on cb, 40' on 6m at the base, 14' in the mobile, so i'm not far enough in distance or high enough in freq to need lower loss cable. i have no problem with the extra few pennies for 9913. i have no need for lmr240, 400 or bigger($$$) |
Chad
Intermediate Member
Username: Chad
Post Number: 307
Registered: 11-2004
| | Posted on Monday, June 06, 2005 - 9:31 pm: |
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I run Davis Bury flex only because copper did not have burial at the time. You can bet if I relocate i wil be using their coax. Although I got my bury flex from an you bid site for cheap for a remnant.
Chad |
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