http://elecraft.85.s1.nabble.com/Inverted-L-for-160-meters-tp7664325p7664341.html
So Michael — what do you use for a baking between the open wire feeder and
> Kevin,
>
>
>
> Be careful when doing these comparisons. A 1/4 wave over a ground
>
> plane unless it has a really good radial system may not be as efficient
>
> than your inverted L. What I would normally suggest is an A/B test using
>
> signal strength at the receiving station, but that has it flaws also,
>
> what's the pattern.
>
>
>
> 73,
>
>
>
> Barry
>
>
>
> K3NDM
>
>
>
> On 8/25/2020 8:21 PM, kevinr wrote:
>
> > I am hearing quite a difference between my inverted V and my 1/4 wave
>
> > over a ground plane. For the last few weeks I've been hearing less
>
> > noise on the vertical. Enough less to pull more ops out of the
>
> > noise. When I try the inverted L I expect there to be a little more
>
> > noise than the vertical, but less than the doublet. Now to test that
>
> > hypothesis.
>
> >
>
> > Kevin. KD5ONS
>
> >
>
> >
>
> > On 8/25/20 5:04 PM, David Gilbert wrote:
>
> >>
>
> >> Pretty sure there are some significant pattern differences between
>
> >> ANY horizontal antenna and a vertical one on 160m ... at least at
>
> >> heights practical for amateur radio purposes.
>
> >>
>
> >> That's probably why.
>
> >>
>
> >> Dave AB7E
>
> >>
>
> >>
>
> >> On 8/25/2020 4:49 PM, Lyn Norstad wrote:
>
> >>> Good gracious. Why does everyone overthink 160m? OK, maybe just
>
> >>> because it's fun. I get that.
>
> >>>
>
> >>> But as to operation, I have one (1) antenna, and it is a 360 foot
>
> >>> EDZ (dipole) cut for 3.5 MHz. It's great on all bands, 160 - 6m.
>
> >>> No radials needed.
>
> >>>
>
> >>> Specifically I worked 47 of the 50 states in one 24 hour period on
>
> >>> 160m (holdouts were AK, HI and NV - all picked up within a day or two).
>
> >>>
>
> >>> I could 'splain more, if anyone is interested.
>
> >>>
>
> >>> 73
>
> >>> Lyn, W0LEN
>
> >>>
>
> >>>
>
> >>>
>
> >>> -----Original Message-----
>
> >>> From:
[hidden email]
>
> >>> [mailto:
[hidden email]] On Behalf Of kevinr
>
> >>> Sent: Tuesday, August 25, 2020 6:24 PM
>
> >>> To: Elecraft Reflector
>
> >>> Subject: [Elecraft] Inverted L for 160 meters
>
> >>>
>
> >>> From what I can find, and what I can calculate, five wires, each ~130
>
> >>> feet long, could make a nice inverted L for 160 meters. One leg for
>
> >>> the
>
> >>> vertical and horizontal portion of the antenna. Four legs for the
>
> >>> counterpoise (ground plane). There are many broken wire antennas
>
> >>> stored
>
> >>> in my shed which are fodder for the radials. Do all of the legs for the
>
> >>> counterpoise need to be 1/4 wavelength or can I substitute some shorter
>
> >>> lengths? The feedpoint should somewhere above 50 ohms impedance. As I
>
> >>> add more radials that number will reach 50 ohms asymptotically.
>
> >>>
>
> >>> I can get the vertical part up to 70 or 80 feet above ground with the
>
> >>> rest of it horizontal. Most of the radiation should take place from
>
> >>> the
>
> >>> vertical part since it is closer to the feed point. But there
>
> >>> should be
>
> >>> some effect from the direction of the horizontal portion. How strongly
>
> >>> does the direction of the horizontal portion effect the radiation
>
> >>> pattern of the antenna system? My property allows me to point it from
>
> >>> 300 degrees around to 200 degrees so I have plenty of options. Between
>
> >>> 200 and 300 degrees there is a road used by loggers, and the folks
>
> >>> maintaining the towers at the top of this mountain. They can break any
>
> >>> antenna lower than 80 feet above ground. Spar poles and cranes clear
>
> >>> out any dead limbs across the road.
>
> >>>
>
> >>> Inquiring minds...
>
> >>>
>
> >>> Kevin. KD5ONS
>
> >>>
>
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> >>
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