[TowerTalk] feeding a Moseley S-403 40 meter three el. beam

Ray, W4BYG w4byg at att.net
Fri Dec 12 12:18:00 EST 2014

It is used on a shortened beam which utilizes a center loading coil for 
resonance, such as the Moseley 40 meter S-402 and S-403.

The loading coil on the DE has a second 50 ohm "link" coil mounted over 
the center of the larger element resonating coil.  The link coupling 
effectively couples the coil/ antenna and eliminates the need for a balun.

I have enjoyed using the S-402 for over 35 years with no complaints.
Ray, W4BYG

   On 12/12/2014 10:22 AM, john at kk9a.com wrote:
> What is a link coupled driven element?
> John KK9A
> To:	John King <k5pgw at yahoo.com>, towertalk at contesting.com
> Subject:	Re: [TowerTalk] feeding a Moseley S-403 40 meter three el. beam
> From:	"Ray, W4BYG" <w4byg at att.net>
> Date:	Tue, 09 Dec 2014 13:47:38 -0500
> John,
> I have had the S-402 for years, which I believe has the same kind of a DE
> and parasitic coil configurations. If my memory serves me right, the
> reason they do not specify a balun, is the driven element coil is link
> coupled and matched to 50 ohms, eliminating the need for a balun..
> Regards,
> Ray, W4BYG
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