[Antennas] VSWR on Log Periodic.
Dave Shrader
[email protected]
2002年4月25日 08:16:20 -0400
George,
It is a broadband 5 band high efficiency antenna with moderate gain [5.8
dBd}] and fair to VG F/B. It offers a 5 band solution with gain at less
cost than than 5 monobanders, or a tribander with add on dipoles, or
competitive or a tribander with add on elements.
It my opinion it is the most economical solution to a 5 band [20 - 10]
gain antenna. Gain is basically constant and at high efficiency.
The ARRL Antenna Book provides an excellent discussion of LP
performance.
Dave, W1MCE
"George, W5YR" wrote:
>> Dave, the SWR array is impressive, but how do relate this characteristic of
> the antenna to the various aspects of its performance? The low and
> reasonably constant SWR translates into convenience is using the antenna
> over a number of bands, but does it predict or relate to any particularly
> beneficial performance attributes?
>> Not trying to yank your chain, because this is interesting data, but I am
> trying to understand your emphasis on this aspect of the antenna system.
> What should we read into this data?
>> 73/72/oo, George W5YR - the Yellow Rose of Texas
> Fairview, TX 30 mi NE of Dallas in Collin county EM13qe
> Amateur Radio W5YR, in the 56th year and it just keeps getting better!
> QRP-L 1373 NETXQRP 6 SOC 262 COG 8 FPQRP 404 TEN-X 11771 I-LINK 11735
> Icom IC-756PRO #02121 Kachina 505 DSP #91900556 Icom IC-765 #02437
>> 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
> - - -
>> Your moderator for this list is:
> Larry Wilson KE1HZ [email protected]
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