[TowerTalk] Antenna Analyzer Question

[David Gilbert]

I don't know how you came up with that conclusion.  Even the cheapest 
NanoVNAs I'm aware of have the ability to do SOL compensation.  Most 
even come with the loads.

If you meant feedline length compensation, OK ... but that's a totally 
different matter.  And just about every NanoVNA can be operated and 
controlled by NanoVNASaver, which is a free application that can create 
an .s1p Touchstone file, which in turn can be inputted into Zplots (a 
free application from AC6LA) which DOES have the ability to calculate 
the impedance at the far end of a transmission line.

Or you can just take the reading from the near end of the coax and feed 
that impedance into either TLW or TLD (similar apps that are both free) 
to determine the impedance at the far end.  This is what I typically do 
for single frequency measurements.  And like somebody else here posted, 
you don't even need to physically measure the length of the coax if you 
can get to the far end.  Just short it and plot a sweep to determine the 
length.

Dave   AB7E



On 2/11/2026 4:55 PM, Tom Hellem wrote:
> Yes it seems few or none of the typical analyzers have the capability
> to do the SOL compensation.