Ham Radio Deals
https://www.hamradiodeals.co.uk/forums/

END FEDWIRE--SILVER ROD
https://www.hamradiodeals.co.uk/forums/viewtopic.php?f=43&t=19764
Page 1 of 1

Author:  bribar [ Wed Apr 27, 2011 10:55 am ]
Post subject:  END FEDWIRE--SILVER ROD

Steve--I wonder if you could help--I have a TRIO 530S--just listening on--but may like to transmit--the wire is stranded end fed 75 ft-outside slopeing from 30ft to 10 ft, and 35 feet inside, to an MFJ atu--with a DIAWA CROSS NEEDLE SWR METER--for LSB BANDS---(is this ok to transmit on)--and I hope to put a aluminiun silver rod up for USB 18ft in lenght--(adjustable)--is there a length to adjust to get the best of USB contacts--(just voice)--From base of vertical it will be 20 feet from ground--and to help strenghten it, I will use a 10 ft garden cane inside--to stop it bending in any high winds-thank you brian.--

Author:  2e1hje [ Wed Apr 27, 2011 11:21 am ]
Post subject:  Re: END FEDWIRE--SILVER ROD

What bands are you looking at? You mention USB and LSB but don't mention what bands / frequencies you wish to use it on.

Author:  bribar [ Wed Apr 27, 2011 12:59 pm ]
Post subject:  Re: END FEDWIRE--SILVER ROD

wire on 80/40 meters--also silver rod rest of USB--FREQS-WHEN OPEN--years ago 1984-I worked 298 stations on a G5RV full size--and a silver rod--that was when the bands was open--but not been on radio for over 15 years now--so both ant could still work all bands--but just a long wire up to now--soon have a silver rod--(but not sure if wire will load up)--no more than 100 watts, would I ever use--and never on CW--73s and thank you brian

Author:  G0UAZ [ Wed Apr 27, 2011 1:03 pm ]
Post subject:  Re: END FEDWIRE--SILVER ROD

2e1hje wrote:
What bands are you looking at? You mention USB and LSB but don't mention what bands / frequencies you wish to use it on.


He is referring to the bands you use USB and LSB on, as in normal amateur convention. Above 10Mhz USB and below LSB. Of course the 10Mhz band is narrow mode anyway, but as the actual frequencies are above 10Mhz they would be USB too. I had to read it twice as it didnt click immediately with me either.

Author:  G3TXQ [ Wed Apr 27, 2011 1:32 pm ]
Post subject:  Re: END FEDWIRE--SILVER ROD

Hi Brian,

It's possible to match almost anything using a wide-range external tuner, and almost anything will get you some contacts. But there are a couple of problems (at least) with your end-fed wire arrangement:

1) An end-fed wire is only one half of the antenna; the other half will be the route that the RF takes to get from your tuner to ground. That could be via your domestic mains supply!

2) About a third of your wire is inside the house.

Both of those things could potentially cause you RFI problems and a high noise level on Rx

I don't know the "Silver Rod", but I guess it's an 11m antenna. If so, I don't know how you intend to use it on other bands. If you are thinking of simply feeding it with coax via the tuner you're likely to experience high losses in the coax and radiation from the braid.

If you could describe your property and the constraints you have, it's possible we could come up with better suggestions.

73,
Seve G3TXQ

Author:  bribar [ Wed Apr 27, 2011 3:29 pm ]
Post subject:  Re: END FEDWIRE--SILVER ROD

Hello --my property is a brick built with tiled roof--(not slates)--silver rod is an 11 meter band--but tunes up very good wirh a decent atu from 10 upwards ---adjusted at 28 mhz (16ft- 2inches)--it used to be--SWR-down to 1/2--with no atu in line--useing 50 ohm coax cable--but its the long wire I was maimly concerned about--even now just listeming it does seem noisy--sometimes--(so what do you suggest-for 40/80 meters) antenns wise, (are the bands due to open shortly ??????)----on 40/80 0n wire it is noisy sometimes--but on wire on other bands when open it if pretty loud and clear, if anyone is transmitting.thank you again -- brian--(rear garden is 50ft long-23ft wide)--

Author:  bribar [ Wed Apr 27, 2011 4:05 pm ]
Post subject:  Re: END FEDWIRE--SILVER ROD

KEV--and all who have replied--many thanks for suggestions--all will be noted in the brain box--and will now rethink what needs doing--73s brian

Author:  bribar [ Thu Apr 28, 2011 8:54 am ]
Post subject:  Re: END FEDWIRE--SILVER ROD

NOW DECIDED--JUST TO LISTEN AND NOT TRANSMIT--(AGAIN THANKS TO ALL WHO REPLIED)----73s BRIAN

Author:  G0NIG [ Thu Apr 28, 2011 11:57 am ]
Post subject:  Re: END FEDWIRE--SILVER ROD

Hi Brian

I can echo Steve's advice about tuning a wire at the feed point, especially the more distant from the shack as possible.

I use a SG-230 Smartuner (the industry standard) for my long wire. Currently it is situated in the garage and the wire antenna
is strung to the far end of the garden with lots and lots of radials. My intention is to place the tuner / feedpoint at the far end of the
garden and have the wire antenna coming back toward the house. My property is such that the far end of the garden is at the same
height as that of the bathroom window and comprises terraced flower beds and concrete, no where to bury radials. However at the
new location of the feedpoint I'll be able to run the radials underneath my wooden decking as currently they are all layed out across the
lower patio and through the flowerbeds, it's a miracle that none of my family, or the local wildlife, have been garroted yet.

The SG-230 is quite a chunk of cash, about £400, for a 200W ACU but tests against other similar devices (MFJ, Maldol, Icom) have
shown it to be the most efficient. It's also very versatile and can be used in conjuction with a near unlimited amount of configurations
from verticals through dipoles/doublets and loops. I personally would not be without mine, especially for the lower bands (160m - 30m).

A much cheaper alternative, that will work with much reduced efficiency, would be to use a simple UnUn at the feedpoint. This will
reduce the impedance on the non-resonant bands so that your radio's AMU or external matching device will be able to replicate
a 50Ohm load to the radio much more easliy, and also help to reduce the noise you are suffering.

Don't get too disheartened as 99% of the time a usable solution can be obtained.

Regards

Author:  bribar [ Thu Apr 28, 2011 12:34 pm ]
Post subject:  Re: END FEDWIRE--SILVER ROD

Nidge--I fully understand--but I cant get radials out as my garden has been flagged, apart from boarders around the flags--(XYL likes her flowers), (and after being married 53 years)-- its her hobby gardening----- apart from one side 3 ft wide--(and full of roses/flowers etc)--(and easy to maintain)--also the times I may use the radio, it would not be worth the extra expense--so at present I will just be a SWL--maybe the interest will come back--if and when the bands open--but thanks for your information--73s brian.

Author:  m1rpw [ Sat Apr 30, 2011 5:12 pm ]
Post subject:  Re: END FEDWIRE--SILVER ROD

Hi Brian,

My advice would be to keep exploring the options, as others have said, a solution can always be found. In my instance I have a dipole that radiates quite well from 10 MHZ to 28MHZ. The very short coax feeder (no balun yet!) runs up to the loft window, both legs then go through the window (touching the metal frames). One (the shortest) leg goes to the chimney (about 12 feet) and the other leg (about 20 feet) lies ON the slates of the roof. I put it up as a very temporary ant just to get me on the air about 4 months ago. It's staying up because it's very unobtrusive and works very well indeed for what it is.

On CW I have worked into the States and Asiatic Russia. I frequently get 59 into Europe when conditions are good. I don't know if you work CW but it really helps in compromised situations. I have also have S9 reports on SSB into Europe. All of this is on 5 watts QRP and sometimes less.

Any chance your wife would let you bury the radials in the borders if you promise to do the weeding/pay for new plants?

When conditions are good you'll work stations on a bit of wire dropped from the upstairs window. I once used a TV coaxial feeder as an ant and it worked really well. This would need a good earth to be effective. The MFJ Artificial Earths are quite effective in this respect.

Author:  m1rpw [ Sat Apr 30, 2011 5:16 pm ]
Post subject:  Re: END FEDWIRE--SILVER ROD

Anotrher thought. Try the G-QRP guide to antennas. Loads of solutions in there. At the least you might come up with a better RX antenna you can occasionally TX with when the bands are lively.

Author:  m0jha [ Sat Apr 30, 2011 5:55 pm ]
Post subject:  Re: END FEDWIRE--SILVER ROD

m1rpw wrote:
Anotrher thought. Try the G-QRP guide to antennas. Loads of solutions in there. At the least you might come up with a better RX antenna you can occasionally TX with when the bands are lively.


that's if you can read it :shock: i got a copy.. Now maybe some of the members are blind as bats but that's no reason for a book with the quality that has/had.. virtually unreadable most of it ..

Author:  tonyxxx [ Sat Apr 30, 2011 6:05 pm ]
Post subject:  Re: END FEDWIRE--SILVER ROD

Loads of info on the www, but look here
73 g0whf
http://www.ea1uro.com/pdf/Practical%20A ... ol%204.pdf

Author:  m1rpw [ Sat Apr 30, 2011 8:26 pm ]
Post subject:  Re: END FEDWIRE--SILVER ROD

m0jha wrote:
m1rpw wrote:
Anotrher thought. Try the G-QRP guide to antennas. Loads of solutions in there. At the least you might come up with a better RX antenna you can occasionally TX with when the bands are lively.


that's if you can read it :shock: i got a copy.. Now maybe some of the members are blind as bats but that's no reason for a book with the quality that has/had.. virtually unreadable most of it ..


That's not a seconder for the recommendation then?? :wink:

Page 1 of 1 All times are UTC
Powered by phpBB © 2000, 2002, 2005, 2007 phpBB Group
http://www.phpbb.com/