[AMRadio] Antenna Question

[W5AMI]

Thanks Don, Bernie and all for confirming this.  That is exactly the way I
have done with the 1/2 wave dipole for years with no issues.  I don't think
many hams even know what a link coupled tuner is now days!

73
Brian / w5ami


On Sun, Sep 15, 2013 at 5:10 PM, Donald Chester <k4kyv at charter.net> wrote:

> Can
>> I not simply run a proper length of ladder line directly to my tuner from
>> the antenna?  I don't want to use ferrite baluns in any of my antenna
>> systems.
>>
>> Thanks & 73
>> Brian / w5ami
>>
>
> Of course you can. And I can't see why that would be off topic.
>
> Just measure out the total length of ONE LEG of the dipole plus the length
> of the open wire feed line. If that total length adds up to close to an odd
> number of quarter waves, the end of the transmission line will present a
> low impedance to the link coupled tuner. Use series tuning. If the total
> length of one leg plus the feedline is near to an even number of quarter
> waves, the tuner will see a high impedance load. Use parallel tuning. Try
> to avoid a total length that is midway between a voltage point and a
> current point, IOW an odd number of eighth-waves. That will cause the tuner
> to see a highly reactive load that will be difficult to tune with a simple
> link coupled balanced tuner.
>
> If each  leg of the dipole is the same  length, the antenna is close to
> horizontal and parallel to the ground, and the feeders come off
> perpendicular to the horizontal wire and remain so for at least a quarter
> wavelength, the feed point should be inherently balanced, so no balun is
> needed with a balanced link-coupled tuner.
>
> 73,
>
> Don k4kyv
>
>
> ______________________________**______________________________**__
> Our Main Website: http://www.amfone.net
> AMRadio mailing list
> Searchable Archives: http://www.mail-archive.com/**
> amradio at mailman.qth.net/<http://www.mail-archive.com/amradio@mailman.qth.net/>
> List Rules (must read!): http://w5ami.net/amradiofaq.**html<http://w5ami.net/amradiofaq.html>
> List Home: http://mailman.qth.net/**mailman/listinfo/amradio<http://mailman.qth.net/mailman/listinfo/amradio>
> Post: AMRadio at mailman.qth.net
> To unsubscribe, send an email to amradio-request at mailman.qth.**net<amradio-request at mailman.qth.net>with
> the word unsubscribe in the message body.
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>



-- 
"Who feeds a hungry animal feeds his own soul" - Charles Chaplin