Originally Posted by josh6113
If you think the numbers are bugus send Paul speltz and email or call him and ask...he is an EE so I'm sure he isn't crazy.
If he is interested, perhaps you can let him know. Some cable vendors simply ignore me (hmm, maybe it's me?
These types of cables will ALWAYS have L and C in a very specific relationship, and that is the product will always be very close to constant.
LC = 1034 EDC, L in nH per foot, C in pF per foot. For zips, EDC is between 4 and about 6. For coax and wide aspect ration striplines, EDC will be the dielectric coefficient of the insulation. Non foamed plastics are generally 2.7 to 4, and foamed are generally 1.05 to about 1.5.
The propogation velocity of the cable will be C times 1/sqr (EDC).
ps..btw, if EDC calcs out to less than 1, the cable is superluminal and King Gustav will be calling. If it's 14 as per the stated values, then you've a valuable new dielectric which should find it's way into capacitors. Course, the more reasonable explanation is test
pps. I've tacked up a graph showing the tradeoff between L and C for varying DC's. Note that the data is with double braid construction, so the 15 nH per foot internal inductance is not present in the graph. Nor, is there any consideration for proximity effect between closely spaced wires which would slightly reduce the numbers.