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Re: 15-D Coax

Not necessarily,  I am retired and do not recall anything about 15-D coaxial.  But I do have a degree in electronics engineering and can tell you that there is more that affects coaxial attenuation than just center conductor size.   First, the metallurgy of the conductors affects the movement of electrons.  So 2 cables with the exact same size center conductors made with 2 different alloys will have 2 different losses.  Also, the composition and design of the dielectric affects the loss.  That is a significant reason why MC^2 cable has less loss than PIII cable and PIII has less loss than PI coax.  Anywhere low loss coaxial cables are needed, air dielectric is the choice.  Of course, the lower the loss, the more expensive the cables.  So Cable TV has not used expensive air dielectric coaxial extensively for OSP.  I think I have made my point about attenuation being more than just center conductor size, so I will quit here and not bore you with how Capacitive Reactance also affects coaxial attenuation. 

This is CABL.com posting #393046. Tiny Link: cabl.co/mbOpC
Posted in reply to: Re: 15-D Coax by catv4u
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