[Antennas] VSWR on Log Periodic.

[Dave Shrader]

Don, I agree. 

When the antenna was assembled the full frequency range was swept with
the MFJ 259 [I believe, it was borrowed] at the antenna connector. The
readings I presented are totally typical. The antenna did NOT exceed
1.8:1 VSWR ANYPLACE in the bandpass, except at boom resonance which is
hairpin tuned.
 Dave, W1MCE
Don Havlicek wrote:
> 
> In my opinion, the ONLY meaningful SWR measurements are AT THE ANTENNA..
> NOT at the shack!
> Don - N8DE
> 
> Dave Shrader wrote:
> >
> > I have an 8 element LP [Tennadyne T8] at 40 feet on Rohn 25 over New
> > England soil. Tonight temp is 45F, Humidity is 50%, soil is average New
> > England with grass growing without irrigation. It slopes off by 10 feet
> > to the north.
> >
> > I made some claims regarding VSWR from 13 MHz to 33 MHZ. Attached are
> > the actual readings at my location using both the VSWR meter in ICOM 746
> > and a Daiwa CN 101L
> >
> > Frequency       VSWR
> > 14.0            1.3
> > 14.1            1.3
> > 14.2            1.3
> > 14.3            1.4
> > 14.35           1.4
> >
> > 18.07           1.5
> > 18.17           1.4
> >
> > 21.0            1.7
> > 21.1            1.7
> > 21.2            1.7
> > 21.3            1.6
> > 21.4            1.5
> > 21.45           1.5
> >
> > 24.89           1.5
> > 24.99           1.7
> >
> > 28.0            1.8
> > 28.1            1.7
> > 28.2            1.5
> > 28.3            1.3
> > 28.4            1.2
> > 28.5            1.1
> > through 29.5    1.1 [every 100KHz from 28.5 to 29.5 is 1.1]
> > 29.6            1.2
> > 29.7            1.2
> >
> > Not bad for a nominal 5.8 dBd antenna. These readings are unique to my
> > location and should be used only for nominal purposes of supporting my
> > assertion that a LP is uniformly a VG antenna across the 20 meter to 10
> > meter ham bands.
> >
> > Dave, W1MCE
> > - - -
> >
> > Your moderator for this list is:
> > Larry Wilson KE1HZ antennas-owner@mailman.qth.net
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