[Elecraft] Speaker Wire Loss Study

[John Oppenheimer]

There were some comments about speaker loss and the contribution of loss
as a result of vinyl dielectric. A way to evaluate is to measure a
length of speaker wire and compare to an air dielectric equivalent. Here
is an example:

https://www.kn5l.net/SpeakerWire/

The Air dielectric equivalent model is for #18 with spacing for a Zo
match with the speaker wire, 117 Ohm.

Note that at 10 MHz, the speaker wire loss is over three times the air
dielectric equivalent.

A DC resistance of the speaker wire suggested that the wire size is
actually closer to #19. Tough measuring these very low DC resistances,
so decided to assume #18 for the air dielectric model.

The speaker wire loss and Zo used a Zoc and Zsc data set. There are
links to the two files for verification.

Check my math!

John KN5L