| Author |
Message |
    
Cbblackbeard
Intermediate Member
Username: Cbblackbeard
Post Number: 190
Registered: 12-2003
| | Posted on Tuesday, January 09, 2007 - 8:41 pm: | 
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I just moved into a new house and I'm looking for some advice on how to set up my cb sation here. The equipment I will be using will be a General Lee or Texas Ranger 696F and a Solarcon A99 with a tv antenna mast on a tripod on the roof. My biggest question is: What would be the best type of coax to use, and what length? |
Streaky
Member
Username: Streaky
Post Number: 75
Registered: 3-2006
| | Posted on Tuesday, January 09, 2007 - 9:16 pm: |
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length of coax is as long as you need.
type of coax is the best you can afford.
From what I have read on this forum length does not matter and really has no effect on tuning.
Just be sure to use a high quality coax (LMR 400)or equivalant and yuo should be fine.
Streaky
CEF #805
CVC #98
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Tech808
Moderator
Username: Tech808
Post Number: 12695
Registered: 8-2002
| | Posted on Tuesday, January 09, 2007 - 9:58 pm: |
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CLICK HERE ®Altelicon CA-400 400 Series Cable
H00-02006 Altelicon CA-400 400 Series Cable
$ .59
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
QUANTITY DISCOUNTS
500+ .55
Hope this help's,
Lon
Tech808
N9CEF
CEF#808/HAM#33
CVC#002
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Bruce
Senior Member
Username: Bruce
Post Number: 4315
Registered: 9-2003
| | Posted on Tuesday, January 09, 2007 - 10:01 pm: |
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COAX just transports power from the radio to the antenna if your antenna is right the length of the coax dosn't matter.
If you cut the coax for a low reading all your doing is TRICKING the VSWR meter ... since it reads VOLTAGE and voltages goes from max to min every 1/4 wave.... |
Tech237
Moderator
Username: Tech237
Post Number: 685
Registered: 4-2004
| | Posted on Tuesday, January 09, 2007 - 10:19 pm: |
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Read the article on coax under Subscribers/Articles.
To show and accurate reading on the SWR meter in the shack the coax should be a multiple of an electrical half wave or a multiple of 3.64m. Any other length will work but there is no assurance that the indicated SWR will be correct
Simon
Tech237
KD7IEB
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Cbblackbeard
Intermediate Member
Username: Cbblackbeard
Post Number: 191
Registered: 12-2003
| | Posted on Wednesday, January 10, 2007 - 6:54 pm: |
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Thanks for the info. Now I'll have to get my wife to buy me some coax for my birthday. |
