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Re: LF: RE: O.T.: T2FD ANTENNA

To: "rsgb_lf_group@blacksheep.org" <rsgb_lf_group@blacksheep.org>
Subject: Re: LF: RE: O.T.: T2FD ANTENNA
From: Mal Hamilton <g3kevmal@talktalk.net>
Date: Sat, 19 Mar 2016 16:44:58 +0000
In-reply-to: <EE956C2C-7671-429F-82C2-14315559A397@talktalk.net>
References: <56E526C8.5010401@abelian.org> <1536f9e8813-7821-7aea@webprd-m99.mail.aol.com> <CAC+C6w4XJy+WKnEf47ETU_peN278dPeGRyE=MBy6NwUY-zt8EA@mail.gmail.com> <56E5DCEF.4050905@abelian.org> <56E7090D.4090601@tiscali.co.uk> <56E7122E.1090907@abelian.org> <016f01d17e34$65318b80$2f94a280$@comcast.net> <56EAF20F.7050008@abelian.org> <AAAFED4CB32644FF9B9A75F356C778D4@AGB> <E1ah1cx-00074b-Jo@post.thorcom.com> <42081A973ECB45D9AEDDCEF41BE9EEE3@Clemens0811> <EE956C2C-7671-429F-82C2-14315559A397@talktalk.net>
Reply-to: rsgb_lf_group@blacksheep.org
Sender: owner-rsgb_lf_group@blacksheep.org
This type of aerial goes back to at least the 1950's and had 3 wires in a 
sloping config making it broad band with a term resistor
Called a SFTD and used commercially



G3KEV


On 19 Mar 2016, at 09:32, Mal Hamilton <g3kevmal@talktalk.net> wrote:

> Good RX Aerial 
> SFTD------
> Sloping Folded Terminated Dipole
> 
> 
> G3KEV
> 
> 
> On 19 Mar 2016, at 08:45, "Clemens Paul" <cpaul@gmx.net> wrote:
> 
>> Hi Mauro,
>> 
>> I have no hands on experience with this antenna,
>> but simulations by experts have shown that one should go for a ~900 Ohm
>> termination resistor and at least 50m length if you want to keep losses
>> acceptable (5dB) on 3.5MHz.
>> I'll send you the article per PM.
>> 
>> 73
>> Clemens
>> DL4RAJ 
>> 
>> 
>> 
>>> -----Original Message-----
>>> From: owner-rsgb_lf_group@blacksheep.org 
>>> [mailto:owner-rsgb_lf_group@blacksheep.org] On Behalf Of IK1WVQ Mauro
>>> Sent: Friday, March 18, 2016 6:13 PM
>>> To: rsgb_lf_group@blacksheep.org
>>> Subject: LF: O.T.: T2FD ANTENNA
>>> 
>>> Hi to all,
>>> 
>>> someone has experience about the T2FD (Tilted Terminated Folded 
>>> Dipole) antenna ?
>>> 
>>> My need is a broadband antenna from 3.5 to 14Mhz WITHOUT any matching 
>>> unit (TX 2W max)...
>>> I gladly accept to lose 30% power into the resistive termination, if 
>>> this is the bandwidth price !!
>>> 
>>> 73 de Mauro IK1WVQ
> 


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