So Michael — what do you use for a baking between the open wire feeder and the coaxial outputs of the KPA500?
Go go with noises of a vertical antenna, a separate quiet receiving antenna like a K9AY is helpful. Important is to have fun. On Tue, Aug 25, 2020 at 20:31 Barry LaZar <[email protected]> wrote: > 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: [email protected] > > >>> [mailto:[email protected]] 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 > > >>> > > >>> ______________________________________________________________ > > >>> Elecraft mailing list > > >>> Home: http://mailman.qth.net/mailman/listinfo/elecraft > > >>> Help: http://mailman.qth.net/mmfaq.htm > > >>> Post: mailto:[email protected] > > >>> > > >>> This list hosted by: http://www.qsl.net > > >>> Please help support this email list: http://www.qsl.net/donate.html > > >>> Message delivered to [email protected] > > >>> > > >>> ______________________________________________________________ > > >>> Elecraft mailing list > > >>> Home: http://mailman.qth.net/mailman/listinfo/elecraft > > >>> Help: http://mailman.qth.net/mmfaq.htm > > >>> Post: mailto:[email protected] > > >>> > > >>> This list hosted by: http://www.qsl.net > > >>> Please help support this email list: http://www.qsl.net/donate.html > > >>> Message delivered to [email protected] > > >> > > >> ______________________________________________________________ > > >> Elecraft mailing list > > >> Home: http://mailman.qth.net/mailman/listinfo/elecraft > > >> Help: http://mailman.qth.net/mmfaq.htm > > >> Post: mailto:[email protected] > > >> > > >> This list hosted by: http://www.qsl.net > > >> Please help support this email list: http://www.qsl.net/donate.html > > >> Message delivered to [email protected] > > > ______________________________________________________________ > > > Elecraft mailing list > > > Home: http://mailman.qth.net/mailman/listinfo/elecraft > > > Help: http://mailman.qth.net/mmfaq.htm > > > Post: mailto:[email protected] > > > > > > This list hosted by: http://www.qsl.net > > > Please help support this email list: http://www.qsl.net/donate.html > > > Message delivered to [email protected] > > ______________________________________________________________ > > Elecraft mailing list > > Home: http://mailman.qth.net/mailman/listinfo/elecraft > > Help: http://mailman.qth.net/mmfaq.htm > > Post: mailto:[email protected] > > > > This list hosted by: http://www.qsl.net > > Please help support this email list: http://www.qsl.net/donate.html > > Message delivered to [email protected] -- 73 de Ted Edwards, W3TB and GØPWW and thinking about operating CW: "Do today what others won't, so you can do tomorrow what others can't." ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [email protected]
