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5

If you are in a jurisdiction that requires compliance with the US NEC (National Electric Code), you will probably find that there is no requirement for grounding the cable or having a lightning arrestor on the cable. This is because the NEC grounding requirement (article 810) starts with the presence of a mast mounted or tower mounted antenna or associated ...


3

The sleeve/shield contact is always "common" between the two switch contacts. I haven't had extensive experience, but the two radios with key inputs I have used both had settings for whether tip and ring were dot and dash or vice versa (or if a straight key was connected, disabling the internal keyer). Note that this setting isn't just useful for ...


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Assuming your question is literally what kind of cable and not what connectors do I need, the answer is: it doesn't matter. Use what is at hand, or what will lay nicely on your desk, or what looks good, or what's cheap at the store, as long as it has two (for a key) or three (for a paddle) conductors. A CW key or paddle is just a switch or pair of switches, ...


2

I always use stereo patch cables for connecting my paddles. The have the right number of conductors, three. Almost all stereo patch cables have two conductors and braided shield which is your third conductor. This works nicely with the standard 1/4 inch stereo phone plug expected by the 718. You can go down to Radio Shack (before all the stores close) or ...


1

Galaxy, there are a number of things to watch out for when connecting power to your Cobra 29LTD AM only CB radio. The power supply must be a regulated DC power supply, which outputs between 12 and 14 V DC. An adapter which outputs AC is no good. Note that many adapters like the one in your picture are not regulated, and when nothing is connected to them ...


1

CB radio service transmitters are limited to 4 watts output power. Figure that that output circuit is only 50% efficient at most, and in round numbers you'll need probably at least a 10W input if not more. For DC circuits the power (watts) is equal to the voltage times the current (amps). Your 12V, 0.3A adapter is therefore rated to supply 3.6 watts which is ...


1

First, although it increases your cable cost slightly, I recommend using only plenum rated cable for attic installation. It's a fire concern. Second, as long as you have good grounding on your radio and power source and you have no exposed metal outside the house, you should be fine without grounding your cable. References to grounding just prior or after ...


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I have had this problem before. The circuits need to be isolated from each other. Either install capacitors in series with the audio or an isolation transformer (better option). An isolation transformer might also keep RF out of the audio signals. For instance, where you have the 10uf capacitor, place another one between the other wire of the audio jack and ...


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Yes this is possible. A standard car cigarette lighter socket is rated at up to 10A and 100W, so you have plenty of leeway. Another question when moving from one car to another, is what to do about an antenna.


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