I am within 3 miles from a 5KW AM station on 970 kHz without a problem. I
do pick up the second harmonic on 1940 but never go that high in the band.
You may have second or third harmonic IX but that depends on the AM
frequency. If the AM station, for example, is on 610 kHz 1830 kHz will be
bad for you for 5 kHz each side of their harmonic.
Herb Schoenbohm, KV4FZ
On Fri, Nov 30, 2018 at 8:50 AM Dave Sublette <k4to.dave@gmail.com> wrote:
> Any info on how it might do on a quarter wave vertical for 160, operating
> within two miles of an AM broadcast station?
>
> Dave, K4TO
>
> On Fri, Nov 30, 2018 at 4:28 AM Jim Brown <jim@audiosystemsgroup.com>
> wrote:
>
> > Here's another nice new toy from DL-land by way of the UK. The designer
> > is DG5MK.
> >
> > https://www.sdr-kits.net/VA5_Page
> >
> > $235 got the analyzer and a better quality cal kit shipped to my door
> > just before CQWWCW. The better Cal kit was $20 of that cost. It took
> > less than two hours to put it together (as I get older I get slower).
> > It's a single-port true vector analyzer, and runs either stand alone on
> > two internal AAs or from VNWA software via a USB port. Decent build
> > quality, BNC is soldered to the board and bonded to the case at the
> > point of entry. The case is a 2-piece metal clamshell, screwed together
> > at four places. In other words, it's well shielded and has no Pin One
> > Problem!
> >
> > There's a beautifully printed manual that covers building and operation,
> > with excellent color photos. Text is excellent in the building section,
> > pretty good in the button-pushing area, a bit weak in the concepts area,
> > and badly disjointed to point of being awful in its description of
> > calibration. The latter is a big deal, because it's the first thing you
> > do once you turn it on!
> >
> > As near as I can tell,when running from VNWA software (FREEWARE), it can
> > do almost everything the VNWA can do with S11 (single-port)
> > measurements, except that choices of sweep rates and dwell time at each
> > data point are a lot more limited. That means I can use the excellent
> > TDR function built into the VNWA software! I don't know yet if I can
> > import complex data made stand-alone. BTW -- the measurement plane is at
> > the end of a 5 ft piece of RG142 from my stash. I find that a convenient
> > length for getting to where I can measure antennas from my shack.
> >
> > This box is designed to be the one you use in the field and at the top
> > of the tower, but with the VNWA software, you can make measurements in
> > the shack, including TDR, then export antenna data to SimSmith to
> > transform it to the antenna ffeedpoint, then use SimSmith to design
> > matching networks and compute loss in the feedline and matching
> networks!
> >
> > This is a VERY nice unit, and a real bargain!
> >
> > 73, Jim K9YC
> >
> >
> > _______________________________________________
> >
> >
> >
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> >
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