[TowerTalk] feeding a Moseley S-403 40 meter three el. beam
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.
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
> 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..
> Ray, W4BYG
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