[Elecraft] Re: Using the KAT2 as an antenna analyzer

[Wayne Burdick]

Julian,

The large "C" value tells me that your load is likely to be very high Q on 40
meters. But determining the actual impedance of the antenna from this data is
complicated by the distributed stray reactances in the KAT2, and extensive
modeling would be required to do a good job of it. Of course it doesn't matter
to the KAT2; it's job is to tune outs its own strays at the same time as it
tunes out the antenna's reactance.

Speaking of which, you might try the "ALT" mode of the ATU rather than the
normal "AUTO" mode with this particular load. The KAT2 can almost always find a
better match than 1.9:1, but with some loads the ALT algorithm is recommended
since it tries a wider range of L-C values.

73,
Wayne
N6KR


"Julian (G4ILO)" wrote:
> 
> Is it possible to use the information you can get from the KAT2 to find
> out something useful about your antenna?
> 
> For example, on 40 metres the KAT2  can only get the match down to 1.9:1
> - 2.5:1.
> 
> I read out the following values:
> 
> L 01.3
> C 1.05
> nEt  1
> t 175
> E 232
> 
> The KAT2 documentation tells me what the individual values mean, but is
> there a formula I could use to get the impedance from these values, or
> something?



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