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

[David Gilbert]

If you have an antenna analyzer that can measure complex impedance (as 
in R +/- jX) and if you are willing to put a connector on one end of the 
cable, I can tell you how to get an accurate length measurement using 
TLW, the transmission line application that comes free with the ARRL 
Antenna Book.  You don't need an instrument with TDR capability (Time 
Delay Reflectometer) to do it.

73,
Dave   AB7E



On 1/12/2020 3:44 AM, Phil wrote:
> I am involved in selling items to benefit the estate of a SK.
> One of the items is a unused roll of 400MAX cable that is still
> in the plastic cling wrap it was shipped in.  I know there is
> at least 100 feet of cable there but I think there is possibly
> 50 or even 100 feet more.  I don't want to unroll the cable to
> measure it and get it all kinked or dirty.  The roll weighs
> 17 pounds.  I've checked the DXE web site but can't find anything
> that gives the weight per foot.  The roll is approximately 8 inches
> inside diameter, 16 inches outside diameter, and contains 55 to 60
> turns.  The packing label on the roll says DXE400MAXDCU200.
> Can anyone help me with a good estimate of the length?
>
> thanks, 73, Phil   W5BVB