[TowerTalk] Need help estimating cable length of DXE 400 MAX

[Jim Brown]

On 1/12/2020 7:10 AM, Tom Hellem wrote:
> The way I do it is take the average diameter of 12" x 3.14 = circumference x number of turns = total length. That gets you pretty darn close.
> 

Yes. Although I own and frequently use test equipment for TDR, I use the 
average diameter method Tom describes to estimate the length of rolls of 
cable and rope. For cables having unknown VF, it's at least as reliable 
as a TDR (because the TDR depends on VF).

Also, many mfrs include the running length in feet with other labeling 
along the cable.

73, Jim K9YC