Re: Topband: Antennas and saltwater

2022-12-19 Thread jh-...@sbcglobal.net
On some of my wharf visits, I would attach a lug to the base of the hamsticks with a long piece of braided copper wire soldered to it with metal washer and other weights attached to the far end, thinking that I would increase the saltwater ground coupling effect. That really didn't pan out and

Re: Topband: Antennas and saltwater

2022-12-19 Thread Boye Christensen via Topband
Don't forget to  add a resistor, to avoid stadic building charge:  10Mohm or so 73 Boye On 20-12-2022 03:17, GEORGE WALLNER wrote: On boat you need to put a capacitor (22 nF or greater) in series with the GND connection. That will stop DC from "melting" your sacrificial anodes. GW On

Re: Topband: Conditions for Stew Perry Contest

2022-12-19 Thread samjos
Here in Pennsylvania propagation to Europe was almost nonexistent. Caribbean was ok, but not great. I did have a period of time where propagation to the Pacific Northwest was good. Regardless, I always enjoy the SP contest and had a great time. Sam(N3XZ) -Original Message- From: Topband

Re: Topband: Antennas and saltwater

2022-12-19 Thread GEORGE WALLNER
On boat you need to put a capacitor (22 nF or greater) in series with the GND connection. That will stop DC from "melting" your sacrificial anodes. GW On Mon, 19 Dec 2022 17:27:59 -0700 Mark Schoonover wrote: I did the same thing unfortunately all the sacrificial zincs disappeared in a few

Re: Topband: Radials, EZNEC and far field

2022-12-19 Thread donroden
Possibly Bouvet in January... W4DNR On 2022-12-19 7:17 pm, Brian D G3VGZ wrote: One other situation, above large quantities of dry ice, Antarctica or perhaps Greenland. Frank W3LPL wrote: Radials have no useful effect in improving low angle radiation, low angle radiation from vertical

Re: Topband: Radials, EZNEC and far field

2022-12-19 Thread Brian D G3VGZ
One other situation, above large quantities of dry ice, Antarctica or perhaps Greenland. Frank W3LPL wrote: > Radials have no useful effect in improving low angle radiation, low angle > radiation from vertical antennas is determined almost entirely by highly > conductive soil or salt water in

Re: Topband: Radials, EZNEC and far field

2022-12-19 Thread Artek Manuals
Soil conductivity plays a much bigger role than most of us realize and the "over salt water" is the gold standard`. As noted by a few other respondents radials are certainly helpful but for those of who live on quartz plains (sand) far from the ocean the far field losses can not be totally

Re: Topband: Antennas and saltwater

2022-12-19 Thread W7TMT - Patrick
I only deploy it when needed. I’m lucky to be able to put antennas up at all so they go up on contest weekend Fridays and come down on Monday. I do leave the ground hanging over the side and lower it into the water as needed to be used with the insulated back stay. It’s a balancing act doing

Re: Topband: Antennas and saltwater

2022-12-19 Thread Mark Schoonover via Topband
I did the same thing unfortunately all the sacrificial zincs disappeared in a few months. On Mon, Dec 19, 2022, 16:18 W7TMT - Patrick wrote: > I run an 80' high vertical on 160M from my sailboat in the saltwater of > Puget Sound/Salish Sea near Seattle. After experimenting with a number of >

Re: Topband: Antennas and saltwater

2022-12-19 Thread kq2m
In 1990 I was visiting Antigua (V2) for 2 weeks. I had a Butternut HF6V with 160 coil and I mounted it on a 3' piece of copper pipe in a secluded part of the beach near the rocks about 2' above the waterline, with about 30 short radials attached to it. At some point in the middle of the

Re: Topband: Radials, EZNEC and far field

2022-12-19 Thread Frank W3LPL
Hi Ignacy - There's little hope that a vertical antenna hundreds of miles from salt water can ever close the gap with an antenna built over a salt marsh or within about a wavelength of salt water. The purpose of radials is reduce losses in the power transfer between a feedline and a vertical

Re: Topband: Antennas and saltwater

2022-12-19 Thread W7TMT - Patrick
I run an 80' high vertical on 160M from my sailboat in the saltwater of Puget Sound/Salish Sea near Seattle. After experimenting with a number of different saltwater connections I've simplified it to a single piece of 1/2" dia. copper pipe 10' long and tapped in the middle. I hang it

Topband: Radials, EZNEC and far field

2022-12-19 Thread Ignacy Misztal
Do more radials on a 160m vertical bring more improvements than shown by simulation? Most simulations, e.g. by EZNEC, show that going above 32 radials on 160m brings minimal improvement, say 1 db to 2 max. Even for low angle signals. On the other hand, some really loud stations on 160m, that

Re: Topband: Antennas and saltwater

2022-12-19 Thread GEORGE WALLNER
If the antenna stands in the salt-water or if you have a short, low impedance connection to the water, you don't need radials. During the VK9WWI DXpedition to Willis Islets, we installed a vertical on a sand spit that was covered by water most of the time. We had 12 radials of various lengths a

Topband: Antennas and saltwater

2022-12-19 Thread Radio KH6O
> Ideal is if you can run some RG58 out to the beach and plunk it next to the > water. Also use 4 radials there. > Enjoy. > Ed N1UR Ed's comment reminds me of the AM broadcast band vertical antennas mounted on concrete foundations located in the back-waters of San Francisco Bay -- directly atop

Re: Topband: Conditions for Stew Perry Contest

2022-12-19 Thread uy0zg via Topband
Hi George I have heard your signal confidently and have called many times. But all I heard from you was CQ CQ CQ --- I have not heard stations from the U.S. (except K1KI and W1UE - very quiet + QSB). There were no conditions. --- Nick, UY0ZG http://www.topband.in.ua GEORGE

Re: Topband: Conditions for Stew Perry Contest

2022-12-19 Thread GEORGE WALLNER
I was operating /MM from St. Martin (FK88) and both the NA and EU stations were weak. OK2CF, who is normally a solid S7 in FL was barely above the noise. Conditions were either very poor or everybody was in the QRP category. The only strong signals were form the Virgin Islands. 73, George,

Topband: Conditions for Stew Perry Contest

2022-12-19 Thread Roger Kennedy
I came on about 4 times during the night, but propagation this side of the pond was really poor. NA Stations that are normally over S9 were around S5 . . . so couldn't hear weaker signals at all. Even Europeans weren't very strong. I did mange to work 16 NA stations, including Colorado and