| Author |
Message |
    
Showtime
New member
Username: Showtime
Post Number: 7
Registered: 2-2007
| | Posted on Sunday, March 18, 2007 - 8:34 pm: | 
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hello. well the tower is up 85f and the laser will be going up tusday.. this is what i got tram rg213/u non-contaminating high temp 105.c or do i need lmr 400.. what would you do? and what about the coil thing under the ant..? or do i just need to come straight down the tower in the shop? thanks for any help.. |
Tech808
Moderator
Username: Tech808
Post Number: 13266
Registered: 8-2002
| | Posted on Sunday, March 18, 2007 - 8:50 pm: |
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Showtime,
With your antenna at 85' I would personally recommend using the Altelicon CA-400 400 Series Cable and it uses a standard Amphenol PL-259 connector.
It has the EXACT same specification's as LMR but about 30 cents a foot CHEAPER! 
CLICK HERE > Altelicon CA-400 400 Series Cable
CA-400 Series Coax Cable
The CA-400 low loss cable is a high performance alternative to RG8/U, CommScope® WBC-400, Times Microwave Systems® LMR-400, Belden® 9914 / 9913 / 7810 and Andrew® CNT-400 coax cable.
Altelicon CA-400 is a UV resistant polyethylene lacketed high performance flexible Low Loss coaxial cable. This coaxial cable has become a "standard" of the outdoor wireless LAN and WLL industries. This lightweight cable has excellent low loss characteristics and a durable UV protected black polyethylene jacket. The Altelicon CA-400 features equal performance and mechanical characteristics to cables from CommScope®, Times Microwave Systems®, Belden and Andrew®.
Construction Specification (Layer - Material - Diameter)
Inner Conductor - Copper/Aluminum - 2.74mm / 0.108in
Dielectric - Physical Foam Polyethylene - 7.24mm / 0.285in
Outer Conductor - Bonded Aluminum Foil + Tinned Copper Braid - 8.13mm / 0.320in
Jacket - Black Polyethylene - 10.29mm / 0.405in
Electrical Characteristics
Capacitance : 77.1pF/m
Impedance : 50ohm
Velocity : 85%
Inner Conductor DC Resistance : 2.92(Ω/km)
Outer Conductor DC Resistance : 5.41(Ω/km)
Shielding Effectiveness : > 90dB
Cutoff Frequency : 16.2 GHz
Peak Power : 16KW
Mechanical and Environmental Characteristics
Min. Bend Radius : 51mm / 2.0in
Operating Temp. : -40°C to +80°C
Tensile Strength : 72.6kg / 160lb
Cable Weight : 0.099kg/m 0.068lb/ft
RoHS Compliant : Yes
Attenuation and Avg. Power (20°C)
(Frequency - Attenuation dB - Avg. Power)
30MHz - (2.2@100m / 0.7@100ft) - 3.30KW
50MHz - (2.9@100m / 0.9@100ft) - 2.60KW
150MHz - (5.0@100m / 1.5@100ft) - 1.50KW
220MHz - (6.10@100m / 1.86@100ft) - 1.20KW
450MHz - (8.9@100m / 2.7@100ft) - 0.83KW
900MHz - (12.8@100m / 3.9@100ft) - 0.58KW
1500MHz - (16.8@100m / 5.13@100ft) - 0.44KW
1800MHz - (18.6@100m / 5.67@100ft) - 0.40KW
2000MHz - (19.6@100m / 6.0@100ft) - 0.37KW
2500MHz - (22.2@100m / 6.8@100ft) - 0.33KW
5800MHz - (35.5@100m / 10.8@100ft) - 0.21KW
Hope this help's,
Lon ~ Tech808 ~ N9CEF
CEF#808 ~ CEF HAM#33 ~ CVC#002
10-10 #61493 ~ 10-10 VP#2688
Tech808@copperelectronics.com
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Showtime
New member
Username: Showtime
Post Number: 8
Registered: 2-2007
| | Posted on Sunday, March 18, 2007 - 11:07 pm: |
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thanks 808 but what is the rating on a pl259? |
Romstar
Junior Member
Username: Romstar
Post Number: 10
Registered: 3-2007
| | Posted on Sunday, March 18, 2007 - 10:52 pm: |
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How do you argue with that?
Excellent specs, and .30 cents cheaper a foot.
With the cost of cable these days, I am beginning to think that melting down pennies might be cheaper in the long run.
Anybody happen to know the insulating characteristics of recycled tire rubber?
Oh and what "coil thing"? Matching coils, arresting coils, balance coils? Which ones?
Romstar |
Jameslarson
Intermediate Member
Username: Jameslarson
Post Number: 315
Registered: 4-2006
| | Posted on Wednesday, April 11, 2007 - 9:29 pm: |
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I have a question. This coax CA-400, is is solid or stranded center? If it is solid, I would NOT recommend it for a beam, because over time, as we all know, turning the beam back and forth, the center will most likely break.
Forummaster Note :
If you are refering to Altelicon CA-400 cable yes it does have a solid center conductor as does Times Microwaves LMR-400. |
Tech833
Moderator
Username: Tech833
Post Number: 1654
Registered: 8-2002
| | Posted on Thursday, April 12, 2007 - 11:51 am: |
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You have 2 choices-
1. Run Altelicon CA-400 from the shack to the top of the tower, then use a flexible cable from top of tower past rotor to gamma match.
2. Use Times Microwave LMR-400 Ultraflex for the entire run. |
Jameslarson
Intermediate Member
Username: Jameslarson
Post Number: 316
Registered: 4-2006
| | Posted on Thursday, April 12, 2007 - 10:48 am: |
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Does Copper Electronics have access to a stranded center version of the CA-400? |
Tech833
Moderator
Username: Tech833
Post Number: 1657
Registered: 8-2002
| | Posted on Friday, April 13, 2007 - 10:32 am: |
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Option #1 is my favorite. That way, if you ever change antennas or feed arrangements, you don't have to change the whole coax run. Just the jumper. |
Tech808
Moderator
Username: Tech808
Post Number: 13477
Registered: 8-2002
| | Posted on Friday, April 13, 2007 - 7:00 pm: |
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Jameslarsen,
Sorry, but there is no stranded center version of the CA-400 as a stranded version would not offer you the same LOW LOSS per foot as the solid core CA-400 with the frequency coverage offered by the CA-400.
Lon ~ Tech808 ~ N9CEF
CEF#808 ~ CEF HAM#33 ~ CVC#002
10-10 #61493 ~ 10-10 VP#2688
Tech808@copperelectronics.com
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