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Re: [VHFcontesting] Tech Help needed

To: chetsubaccount@snet.net
Subject: Re: [VHFcontesting] Tech Help needed
From: Jim Worsham <wa4kxy@bellsouth.net>
Date: Sat, 2 Jan 2021 22:45:47 -0500
List-post: <mailto:vhfcontesting@contesting.com>
That is my thinking also. You can have a single really large antenna with a 
narrow beam width or stack two (or more) smaller antennas.

73
Jim, W4KXY

Sent from my iPad

> On Jan 2, 2021, at 8:46 PM, chetsubaccount@snet.net wrote:
> 
> This brings up again the age old question: do I want to DX or contest?
> 
> A high gain, narrow band antenna does not send a CQ in a wide azimuth. But 
> today's rules allow you to call someone on your cellphone and ask them to get 
> on and give you their grid while you beam there way. 
> 
> Vs.
> 
> Less elements on the yagi (but you can stack them  for more gain or have 
> multiple yagis) and call CQs that may be heard over a wider coverage azimuth. 
> 
> Kind of like fishing- try by yourself to read the areas to fish vs. other 
> boats telling you where to go. Either way you will catch fish and have fun.
> 
> Your station, your choice!
> 
> Hoping to catch many fish this January.
> 
> 73,
> Chet, N8RA
> 
> 
> 
> -----Original Message-----
> From: VHFcontesting 
> <vhfcontesting-bounces+chetsubaccount=snet.net@contesting.com> On Behalf Of 
> Dan Evans via VHFcontesting
> Sent: Saturday, January 2, 2021 7:59 PM
> To: 'Jim Worsham' <wa4kxy@bellsouth.net>; Paul Rollinson 
> <Paulrollinson@sbcglobal.net>
> Cc: 'VHF Contesting Reflector' <vhfcontesting@contesting.com>
> Subject: Re: [VHFcontesting] Tech Help needed
> 
> Hi Paul,No help here with the issue, but I wanted to thank you and the list 
> for the topic.
> I currently have a CC 6 element on a small tower.  I have a bigger tower I 
> hope to put up soon, and I've been wanting to upgrade to the 6M7 if I ever 
> get the tower project off the ground.  So I will likely face the same issues.
> I've been following with interest.
> 73Dan
> -- K9ZF  President, Clark County Amateur Radio Club,Amateur Radio Emergency 
> Service, Clark County Indiana. EM78el The once and future K9ZF /R no budget 
> Rover  ***QRP-l #1269 Check out the Rover Resource Page at:  List 
> Administrator for: InHam+grid-loc+ham-books  Ask me how to join the Indiana 
> Ham Mailing list! 
> 
>    On Saturday, January 2, 2021, 11:55:03 AM EST, Paul Rollinson 
> <paulrollinson@sbcglobal.net> wrote:  
> 
> Good morning all,
> 
> It appears that I'm not alone with this issue. It's a great antenna until you 
> try to push up the band for the digital modes, with potential for more to 
> come.
> 
> So far I've learned this from this list and other friends in the VHF spectrum:
> 
> The theory behind moving the shorting bars out to more the freq up the band 
> may be based on simple J pole type design, when you short higher up the 
> driven element, it increases in resonate freq.
> The 70 ohm (RG-6) phasing line might be able to raise the center freq if 
> shortened. If anyone has done this, please reply with length to attempt.
> The driven element might be able to be sleeved increasing the diameter and 
> potential bandwidth, which is the biggest problem with this design.
> Electrically lengthening the T match bars using  retaining rings at the end 
> may create an aching point at hi power and wet environment. This may be 
> catastrophic for an amp and will not be explored.
> Repositioning D1 may help but this has unknown effect of performance.
> Finding a better, free space test range will be first on the list. I have 
> 90Ft trees here so spanning 2 trees and hanging the antenna in the middle 
> show be effective.
> I still plan on calling M2 on Monday to see if I'm missing something
> 
> I will say this, great responses from the VHF community. Thanks to all.
> 
> 73,
> 
> Paul Rollinson, KE1LI
> Rollinson Associates
> 860-928-5147
> 860-208-8814 Cell/Text
> Paulrollinson@sbcglobal.net
> 
> Representing Component Part 
> Manufacturers for over 35 years
> 
> info/vhfcontesting
> 
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