What electrical difference exists between the smaller RG-58 and larger RG-8 coaxial cables?

RG-8 coaxial cable is designed with a larger diameter than RG-58 cable, which gives it several advantages in terms of electrical performance. One of the most significant differences is that RG-8 typically has lower attenuation (or loss) at a given frequency compared to RG-58. This lower loss is crucial for maintaining signal integrity over longer distances, as the reduced resistance in the larger conductor allows for improved power transfer and thus better performance for applications that require transmitting signals over extended runs.

In contrast, RG-58 is more suited for shorter runs or lower-power applications due to its higher loss characteristics. Though RG-58 might be adequate for some communication needs, when considering longer distances or higher-frequency signals, RG-8 proves to be the superior choice due to its efficient power handling capabilities and lower signal degradation.

Therefore, the key takeaway is that RG-8's construction allows it to have significantly less loss at a given frequency compared to RG-58, making it preferable for many amateur radio applications, especially those requiring high power or longer cable runs.