Why was a frequency so far from 50.125 chosen for FT8? Mike
-----Original Message-----
From: Jim Worsham <wa4kxy@bellsouth.net>
To: chetsubaccount@snet.net
Cc: VHFcontesting@contesting.com
Sent: Sat, Jan 2, 2021 10:45 pm
Subject: Re: [VHFcontesting] Tech Help needed
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
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>
> 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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