Re: Topband: Topband Digest, Vol 176, Issue 14

[gary mankoff]

Hi everyone 
Now that I have narrowed down my antenna for top band , the inverted l ,what 
does the 
" crew" think about feeding the l with 600 ohm owl at the center at the top

Sent from my iPad

> On Aug 29, 2017, at 9:00 AM, topband-requ...@contesting.com wrote:
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> Today's Topics:
> 
>   1. Re: 160 4 SQUARE (Mike - W5JR)
>   2. Re: Inverted L successes (Wes Stewart)
>   3. Re: DX Engineering final field test of the 3Y0Z Bouvet 160
>  meter vertical (David Aslin G3WGN)
> 
> 
> --
> 
> Message: 1
> Date: Mon, 28 Aug 2017 23:29:30 -0400
> From: Mike - W5JR 
> To: TOPBAND 
> Subject: Re: Topband: 160 4 SQUARE
> Message-ID: 
> Content-Type: text/plain;charset=us-ascii
> 
> And I had a great time in the winter TBDXC a couple of years ago QRP using 
> the antennas at Mike's 160 farm. The TX array works very good. 
> 
> tnx
> Mike / W5JR
> Alpharetta GA
> 
>> On Aug 28, 2017, at 5:17 PM, Mike Greenway  wrote:
>> 
>> Greg, N4CC,, I have been using something similar to what you are describing 
>> for about 10 years.  I have 140 ft of Rohn 25 with all Phillystrand guys.  
>> The 4 verticals are supported by nylon cords running from the top of the 
>> tower.  The height of the tower allows me to have 90 ft verticals plus 
>> around 45 ft top hats at the proper spacing between verticals.  I am using a 
>> Comtek phasing box. At present around 40  135 ft radials on each vertical.  
>> I never detuned the tower as the F/B and F/S have always been excellent so I 
>> did not see the need.  I did look into it but decided to leave as it was. It 
>> has been a very competitive transmit system. If you need any further details 
>> contact me.  73 Mike K4PI
>> _
>> Topband Reflector Archives - http://www.contesting.com/_topband
> 
> 
> --
> 
> Message: 2
> Date: Mon, 28 Aug 2017 21:53:24 -0700
> From: Wes Stewart 
> To: topband@contesting.com
> Subject: Re: Topband: Inverted L successes
> Message-ID: <39e87c73-cdd8-bcf9-a43d-ab4d592a4...@triconet.org>
> Content-Type: text/plain; charset=utf-8; format=flowed
> 
> As the real estate people say, "Location, location, location."
> 
> Wes  N7WS
> 
>> On 8/28/2017 3:22 PM, jayb1...@optonline.net wrote:
>> Last fall I installed an ?S-9? 43 ft vertical, added a tapped loading coil
>> at the base, with 10 on-the-ground radials about 100 ft long randomly run
>> all over my 60x90 house plot.  Rig is 300 watts - Started on 160 DXCC with
>> 32 entities, finished DXCC in one winter season.
>> My secret: JT65   (tnx K1JT)
>>  Try anything ? you will be amazed how successful you can be on top-band
>> with a little patience and VERY modest antennas.   73, Jay NY2NY
>> _
>> Topband Reflector Archives - http://www.contesting.com/_topband
> 
> 
> 
> 
> --
> 
> Message: 3
> Date: Tue, 29 Aug 2017 08:24:37 +
> From: David Aslin G3WGN 
> To: "topband@contesting.com" 
> Subject: Re: Topband: DX Engineering final field test of the 3Y0Z
>Bouvet 160 meter vertical
> Message-ID: 
> Content-Type: text/plain; charset="us-ascii"
> 
> Tim, 
> This has probably already been said several times: this should be a DXE 
> product!
> It would be a squeeze, but would just fit into my antenna field...
> 73, David G3WGN  M6O
> 
> 
> -Original Message-
> From: Topband [mailto:topband-boun...@contesting.com] On Behalf Of 
> topband-requ...@contesting.com
> Sent: 29 August 2017 01:22
> To: topband@contesting.com
> Subject: Topband Digest, Vol 176, Issue 13
> 
> The DX Engineering and Bouvet Island teams have worked together to design an 
> efficient 90 foot top loaded 160 meter vertical antenna that can be installed 
> quickly and safely on Bouvet Island by the 3Y0Z team this January.
> 
> With a good radial system the difference in gain between a 120 ft (full 
> quarter wavelength) vertical and this custom 90 foot top loaded vertical is 
> less than 0.5 dB.
> 
> This vertical uses a custom designed heavy duty hinged pivot base with base 
> insulators to accommodate a 40 foot falling derrick 3 inch heavy duty pipe 
> for installation.
> 
> The vertical is base fed using two inductors to match to 50 ohms. 

Re: Topband: DX Engineering final field test of the 3Y0Z Bouvet 160 meter vertical

[David Aslin G3WGN]

Tim, 
This has probably already been said several times: this should be a DXE product!
It would be a squeeze, but would just fit into my antenna field...
73, David G3WGN  M6O


-Original Message-
From: Topband [mailto:topband-boun...@contesting.com] On Behalf Of 
topband-requ...@contesting.com
Sent: 29 August 2017 01:22
To: topband@contesting.com
Subject: Topband Digest, Vol 176, Issue 13

The DX Engineering and Bouvet Island teams have worked together to design an 
efficient 90 foot top loaded 160 meter vertical antenna that can be installed 
quickly and safely on Bouvet Island by the 3Y0Z team this January.

With a good radial system the difference in gain between a 120 ft (full quarter 
wavelength) vertical and this custom 90 foot top loaded vertical is less than 
0.5 dB.

This vertical uses a custom designed heavy duty hinged pivot base with base 
insulators to accommodate a 40 foot falling derrick 3 inch heavy duty pipe for 
installation.

The vertical is base fed using two inductors to match to 50 ohms. The first
70 feet of the vertical is Universal Aluminum tower (12 inch face) and the top 
20 feet is 1.875 inch diameter aluminum tubing.

There are guys at 30, 50 and 70 feet. There are also three 30 foot top loading 
wires attached to the top of the tubing that are tied to anchors 60 feet out 
from the base.

DXE is actually donating two of these vertical packages to the 3Y0Z team in 
case one gets damaged (there are 300 storms per year on Bouvet).

More details on the construction and the final test raising plus VSWR 
measurements are shown in the video filmed and produced (in 4K Ultra) by Greg, 
W8WWV.

https://www.youtube.com/watch?v=bSw-0TjaUiU

73,
Tim K3LR

_
Topband Reflector Archives - http://www.contesting.com/_topband