[Elecraft] KX2 Antenna Analyzer Program

[Jim Sr Sturges]

Walter, thanks. The sweep’s output is within +/- 0.2 of my MFJ, and is fun
to use.

I have found that calibrating my Metric Ford Wrench before tightening any
connectors improves all the results.

73,

Jim N3SZ
On Wed, Feb 21, 2018 at 1:44 PM Fred Jensen <k6dgw at foothill.net> wrote:

> Oh for Pete's sake!
>
> "Left to their own, most hams will complicate a simple subject beyond
> recognition."
>      Art, W6RMK [SK]
>
> who taught me the code at age 12 and said the above while explaining how
> my link coupling to the "tank" matched the 6L6 plate circuit impedance
> [several thousand ohms], to the low impedance at the end of the 75-ohm
> twin-lead from my 40m dipole.
>
> And, to forestall a posting storm from those racing to the keyboard to
> point out the "75 ohm twin-lead typo," there were at least two grades of
> commercial 75 ohm twin-lead, a fairly small, flexible version for lower
> power, and a much heavier, somewhat unwieldy version for high power.
> Been years since I've seen them.  For the less financially endowed [e.g.
> me], there was also lamp cord ... close enough.
>
> 73,
>
> Fred ["Skip"] K6DGW
> Sparks NV DM09dn
> Washoe County
>
> On 2/19/2018 11:45 PM, David Gilbert wrote:
> >
> > No, I don't know that at all.  I understand the reluctance to use that
> > terminology, but strictly speaking you're wrong.  Reactance networks
> > are reciprocal ... they don't care in the least which direction power
> > is heading.  The combination of the feedline, the "antenna tuner", and
> > the output impedance  of the transmitter reflect back along the
> > feedline to the antenna the same reactance that you would use at the
> > antenna feed point to zero out the total reactance there ... i.e.,
> > "tune" it.  The only difference lies with their respective losses.,
> > and if you had lossless feedline and lossless components there would
> > be no difference at all.
> >
> > It's basic network physics, and reciprocity is reciprocity.
> >
> > 73,
> > Dave   AB7E
>
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-- 
Jim Sturges, N3SZ
Amateur Radio operators do it with frequency.