Amateur Radio Stack Exchange
Amateur Radio Stack Exchange

Questions tagged [coaxial-cable]

Questions about coaxial cables, including different types of cable, connectors, adapters, and other topics.

Coaxial cables have two conductors separated by an insulator. The outer conductor, or the shield, wraps completely around the insulated inner conductor. A coaxial cable is typically utilized to connect a device to an antenna, or to another device.

Questions should relate specifically to the properties of coaxial cables in general or a specific type of coaxial cable. Questions about connectors, including soldering or crimping, or about adapters are also on topic. Finally, questions can be about the use of coaxial cable to create baluns or other matching "circuits".

153 questions
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What is the logic behind RG cable codes

What is the logic behind the names of different RG cables? The Wikipedia's Coaxial cable page has a list of different coaxial cable standards but I cannot find the internal logic of the naming. I would assume that coding pretty much anything would…
OH2FXN
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What are the electrical differences between smaller and larger coaxial cables?

How do different sized coaxial cables, such as RG-58 and RG-8, compare in terms of electrical properties such as loss? Do different cable types have different losses at different frequencies? From test pool question: T9B10
JC Hulce
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I have 60 feet of coax but only need 20 feet; can I loop up the excess?

I was given about 60 feet of good cable with connections but only need about 20 feet. Can I loop up the end or do I need to cut and put a new connector on?
Dant1316
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How to calculate coax cable loss for lengths other than 100 feet

Cable loss for coax is mostly given in loss per 100 feet, express in dB. Say I have cable which is 20 dB loss per 100 feet at frequency x. If I use 50 feet (1/2 the length,) would my loss be: 20 dB / 2 = 10 dB or 2 x the power = 20 dB - 3 dB = 17…
KevinHJ
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How to choose a coaxial cable

How do you know which coaxial cable to choose for your application? For instance; I require a cable that has a 50ohm impedance, an operating frequency of 2.4GHz, length of 100mm, and needs to be semi rigid to support the elements of the antenna I…
Ben
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2-blade or 3-blade coax stripper: when would you use one vs the other?

I've been looking for a RG8x/LMR240 coax strippers and found that they come in both 2-blade and 3-blade models. So far I haven't found a reason to use one over the other. I did notice that the 3-blade version does not list rg8x specifically (only…
KJ7LNW
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Suspected Damage in Coax Cable

I suspect that the "white residue" between the coax cable jacket and connector is the result of environmental damage but I could not confirm it yet. Did anyone have a similar issue and if so what was the cause? Thanks, AL6B.
paul0207
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Coax when skin depth is thicker than the shielding

Considering coax cable's operation is based on skin effect and shild current flowing on the inner side of the shield how does it work when the skin depth for a given frequency is more than the foil thickness? I suppose (maybe I'm wrong) coax…
axk
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What is minimum safe bend radius for rg213?

What is minimum safe bend radius for rg213 cable?
quanglewangle
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Coaxial cable identification

Is there a way to identify this coaxial cable? I am interested in model and parameters such as epsilon, diameters etc. There is nothing written.
Pierre Polovodov
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Velocity Factors of Military Spec Coaxial Cables. Are they accurate and consistent in the real world?

I would be very interested in any real life data collected by fellow radio enthusiasts in regard to the velocity factors stated for milspec coaxial cable. e.g., RG213, RG58. How accurate and consistent are these stated velocity factors in the real…
Francis Archibald
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One cable two different radios

I have a GMRS radio and VHF/UHF radio in car. I have an antenna mount and cable installed. I install appropriate antenna for the radio in use and manually remove and attach cable to matching radio. It’s a PITA. Is there a way to split the cable to…
Merlynda
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Type of coax used inside of a transceiver?

If you have had occasion to open up a transceiver for repair or other reasons, you have seen the thin grey coax that's used to carry signals from one part of the radio to another. What is the designation of this coax?
David Hoelzer
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Combining/splitting three different RF signals

Not being so fluent in RF, I decided to ask here if my current approach seems doable or how one would try to achieve something like this: I'm doing research and deciding on an approach for my proto-board, to understand if and how combining signals…
crypton
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RG-213 Cable with electric strained wire as metallic shield of Coaxial cable

I'm using RG-213 coaxial cable for two-way ham radio communication. But due to weather conditions, the metallic shield of my coaxial cable (RG-213) become rusty and carbonated. If I use copper electrical cable 3/.029 as metallic shield with…
ajmal nawaz
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