[50mhz] New DXCC activated on 6m!

Sat Jan 29 21:03:32 EST 2011

I am talking about 2 antennas horizontally stacked Lance. There is no reason 
feeding that way should disrupt anything unless the antennas are poorly 
designed or with something as obsolete as a gamma match.  I use an all metal 
balanced T Match on 6M thru 432 with a coax balun and then plenty of ferrite 
on the feedline, there is no unbalance or feedline radiation.

Use an aluminum support boom but drop the antennas down 3-4' and then use 
the support boom to support the Phillystran boom support cable if needed. I 
have the lower 2 antennas of a 4 bay 2M array dropped 6' below the top of 
the tower. There is no metal in the way to disrupt the pattern and the coax 
can be simply taped to the support boom but you do need good coax with 100% 
shield  coverage if youre after perfection. I use VNA matched quad shield 
CATV RG-11 for phasing lines along with the 4 way splitter; there is no 
argument about improper phasing/power splitting that way. It should be 3 
times easier on 6M.

Carl
KM1H

----- Original Message ----- 
From: "Lance Collister, W7GJ" <w7gj at q.com>
To: "Carl" <km1h at jeremy.mv.com>
Cc: "Bill VanAlstyne W5WVO" <w5wvo at cybermesa.net>; "50mhz" 
<50mhz at mailman.qth.net>; "Magic Band EME Operators" 
<MagicEME at googlegroups.com>
Sent: Saturday, January 29, 2011 6:20 PM
Subject: Re: [50mhz] New DXCC activated on 6m!

> Hello Carl,
>
> I guess I misunderstood you.  I thought you were proposing a PAIR of 
> antennas stacked side by side.  In that case, the grounded coax shield 
> will interfere with the pattern if it is in the plane of the elements.
>
> On 1/29/2011 6:57 PM, Carl wrote:
>> Why non conducting booms and drooping feeds? Its not required in any 
>> horizontal
>> polarized H frame array Ive ever used or seen.
>
> No - if you are talking about 4 antennas on an H frame, there is no 
> problem at all and all the support structure and coax can be orthogonal to 
> the elements.  That certainly is a simpler arrangement mechanically, and 
> an array of four small yagis is not really that large.
>
> VY 73, Lance
>
>
>  Ferrite beads at the feed will
>> eliminate common mode shield radiation.
>>
>> Carl
>> KM1H
>>
>>
>> ----- Original Message ----- From: "Lance Collister" <w7gj at q.com>
>> To: "Carl" <km1h at jeremy.mv.com>
>> Cc: "Bill VanAlstyne W5WVO" <w5wvo at cybermesa.net>; <doc at kd4e.com>; "James 
>> M. Galm,
>> W8WTS" <jim at w8wts.com>; "50mhz" <50mhz at mailman.qth.net>; "Magic Band EME 
>> Operators"
>> <MagicEME at googlegroups.com>
>> Sent: Saturday, January 29, 2011 12:38 PM
>> Subject: Re: [50mhz] New DXCC activated on 6m!
>>
>>
>>> Hello Carl, Bill, et al,
>>>
>>> There is no question that side by side stacking can be done and it 
>>> certainly makes
>>> elevation easier. And if the yagis are horizontally polarized, there 
>>> should be
>>> optimum ground gain. Typically, a 7 element yagi 20' above the ground 
>>> would have
>>> ground gain lobes around 7 and 15 degrees elevation when aimed at the 
>>> horizon...
>>> and when elevated, local noise goes down rapidly.
>>>
>>> Of course, stacking horizontally polarized antennas side by side 
>>> introduces
>>> mechanical challenges since the cross boom needs to be non-conducting on 
>>> the end
>>> sections, and the coaxial phasing lines need to drop down from the yagis 
>>> at right
>>> angles rather than be dressed along the cross boom. However, G3WOS has 
>>> shown with
>>> his new side-by-side horizontal array what success can be had with 
>>> elevation.
>>> Detailed information of the construction and operation of his new array 
>>> is here:
>>>
>>> http://www.gare.co.uk/6m_antenna/
>>>
>>> There are a number of exciting new DXCC coming on 6m in the coming 
>>> months that will
>>> only be workable on 6m EME, which is why more and more people are 
>>> gearing up now ;-)
>>>
>>> GL and VY 73, Lance
>>>
>>> On 1/29/2011 5:14 PM, Carl wrote:
>>>> Why not a side by side long boom array at 10-20' above ground? 
>>>> Elevation pattern
>>>> is raised but I wonder at what point you lose the ground gain?
>>>>
>>>> Ive heard EME at the horizon with my 35' 8el which is at 60' with a 
>>>> hilltop 2-3
>>>> degree negative horizon in most directions. Havent had any interest in 
>>>> working any
>>>> yet it but might have to consider if its the only way to get a new 
>>>> country.
>>>>
>>>> Carl
>>>> KM1H
>>>>
>>>>
>>>> ----- Original Message ----- From: "Bill VanAlstyne W5WVO" 
>>>> <w5wvo at cybermesa.net>
>>>> To: <doc at kd4e.com>; <w7gj at q.com>
>>>> Cc: "James M. Galm, W8WTS" <jim at w8wts.com>; "50mhz" 
>>>> <50mhz at mailman.qth.net>
>>>> Sent: Friday, January 28, 2011 10:56 PM
>>>> Subject: Re: [50mhz] New DXCC activated on 6m!
>>>>
>>>>
>>>>> The primary barrier to 6m EME is man-made noise. While it is possible 
>>>>> for a
>>>>> decent horizon-only station with QRO to make the occasional contact 
>>>>> with EME
>>>>> super-stations on 6m, elevating the antenna 20 degrees or more above 
>>>>> the
>>>>> horizon can drop your noise floor by 10 dB or more -- and that changes
>>>>> everything.
>>>>>
>>>>> I run a kW+ to 5-over-5 on 6m, and I have been successful in making 
>>>>> only
>>>>> three EME contacts on this band, all with bona fide multi-kilowatt
>>>>> super-stations in EU. All other 6m EME attempts have failed due to my
>>>>> inability to even see a signal from most stations, let alone decode 
>>>>> it --
>>>>> all while receiving (by Internet) reports of loudspeaker copy on my
>>>>> transmitted signal. Bottom line, it's all about noise.
>>>>>
>>>>> I haven't done it yet, as my ham radio priorities lie elsewhere, but 
>>>>> if I
>>>>> was going to get serious about 6m EME, the first thing I would do is 
>>>>> put up
>>>>> an elevation rotator system!
>>>>>
>>>>> Bill W5WVO
>>>>> DM65qh
>>>>>
>>>>>
>>>>> -----Original Message----- From: doc at kd4e.com
>>>>> Sent: Friday, January 28, 2011 01:38
>>>>> To: w7gj at q.com
>>>>> Cc: James M. Galm, W8WTS ; 50mhz
>>>>> Subject: Re: [50mhz] New DXCC activated on 6m!
>>>>>
>>>>> I saw the amp listed for him but not the rig.
>>>>>
>>>>> OK re. your station - that is good data as to what is necessary for a
>>>>> serious EME station - good prop. or weak.
>>>>>
>>>>> I am trying to learn what Hams are using who are making contacts on
>>>>> 6M when 99% of Hams hear nothing but static - the requirements do
>>>>> appear the same for borderline EME conditions: an antenna array up
>>>>> high, max. legal output, low-loss everything, top-notch rig.
>>>>>
>>>>> As you say, under good conditions much less is necessary, at least
>>>>> on one end of the QSO.
>>>>>
>>>>> And, as is true of weak-signal and other DX work, knowledge of the
>>>>> band, the propagation, and other specific variables matters.
>>>>>
>>>>>
>>>>> --
>>>>>
>>>>> Thanks! & 73, KD4E
>>>>> David Colburn http://kd4e.com
>>>>> Have an http://ultrafidian.com day
>>>>> I don't google I SEARCH! http://ixquick.com
>>>>> Shop Freedom-Friendly http://kd4e.com/of.html
>>>>> ______________________________________________________________
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>>>>>
>>>>> ______________________________________________________________
>>>>> 50mhz mailing list
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>>>>
>>>>
>>>>
>>>
>>>
>>> --
>>> Lance Collister, W7GJ (ex: WA3GPL, WA1JXN, WA1JXN/C6A, ZF2OC/ZF8, 
>>> E51SIX, 3D2LR)
>>> P.O. Box 73
>>> Frenchtown, MT 59834 USA
>>> QTH: DN27UB
>>> TEL: (406) 626-5728 URL: http://www.bigskyspaces.com/w7gj
>>> LIVE MESSENGER CHAT: w7gj at hotmail.com SKYPE: lancew7gj
>>> 2m DXCC #11, 6m DXCC #815
>>>
>>> Interested in 6m EME? Ask me about subscribing to the Magic Band EME 
>>> email Google
>>> Group!
>>> (or click on the link at the bottom of my web page above)
>>>
>>
>>
>>
>
>
> -- 
> Lance Collister, W7GJ
> (ex WA3GPL, WA1JXN, WA1JXN/C6A, ZF2OC/ZF8, E51SIX, 3D2LR)
> P.O. Box 73
> Frenchtown, MT   59834-0073
> USA
> TEL: (406) 626-5728
> QTH: DN27ub
> URL: http://www.bigskyspaces.com/w7gj
> Windows Messenger: W7GJ at hotmail.com
> Skype: lanceW7GJ
> 2m DXCC #11/6m DXCC #815
>
> Interested in 6m EME?  Ask me about subscribing to the Magic Band EME
> email group, or just fill in the request box at the bottom of my web
> page (above)! 