Return-Path: Received: from rly-ma09.mx.aol.com (rly-ma09.mail.aol.com [172.20.116.53]) by air-ma06.mail.aol.com (v121_r5.5) with ESMTP id MAILINMA064-8cd496cc64c1a7; Tue, 13 Jan 2009 11:50:39 -0500 Received: from post.thorcom.com (post.thorcom.com [193.82.116.20]) by rly-ma09.mx.aol.com (v121_r4.4) with ESMTP id MAILRELAYINMA097-8cd496cc64c1a7; Tue, 13 Jan 2009 11:50:23 -0500 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1LMmRd-0004cB-PI for rs_out_1@blacksheep.org; Tue, 13 Jan 2009 16:48:49 +0000 Received: from [193.82.59.130] (helo=relay2.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1LMmRb-0004c2-LE for rsgb_lf_group@blacksheep.org; Tue, 13 Jan 2009 16:48:48 +0000 Received: from smtp-out-2.talktalk.net ([62.24.128.232] helo=smtp.talktalk.net) by relay2.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1LMmRV-0000K7-Uy for rsgb_lf_group@blacksheep.org; Tue, 13 Jan 2009 16:48:44 +0000 X-Path: TTSMTP X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: ApIFAFNUbElOkJwR/2dsb2JhbACCPzCBZ4ZhBsVOhW8 Received: from unknown (HELO mal769a60aa920) ([78.144.156.17]) by smtp.talktalk.net with SMTP; 13 Jan 2009 16:48:27 +0000 Message-ID: <003301c9759e$c21f3f00$0301a8c0@mal769a60aa920> From: "mal hamilton" To: "rsgb" Date: Tue, 13 Jan 2009 16:48:27 -0000 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.2180 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2180 X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=disabled,AWL=0.045,HTML_MESSAGE=0.001 Subject: LF: Antenna Diversity Content-Type: multipart/alternative; boundary="----=_NextPart_000_0030_01C9759E.C1BD9700" X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.5 required=5.0 tests=HTML_20_30,HTML_MESSAGE autolearn=no version=2.63 X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-AOL-IP: 193.82.116.20 ------=_NextPart_000_0030_01C9759E.C1BD9700 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable LF/MF I am experimenting at present with antenna (space diversity) using two loops= . Loop A is 40 metres perimeter vertical orientation, Loop B is 190 metres p= erimeter also vertical. Both loops optimum E/W. I am using two receivers in this experiment Ant A to Siemens D2155 level met= er, BW 20 Hz and vy stable, Ant B to Datong up converter and IC746 250 Hz BW= . Both audio outputs to soundcard/ARGO display allowing 50 hz separation for= observation. Observing DI2AM at present and having calibrared this signal on both RX outp= uts at a point in time, both signals are fairly constant but more variations= have been observed on Ant A - 40m loop, the signal surges in strength and t= hen fades down, whereas Ant B has a more constant output with less fade. More time is needed for a proper assessment and DI2AM is also a strong signa= l. I would need a few long haul signals for a proper test like Russian or US= A . Interested in MF signals at present. This method would also work with a couple of small loops or a loop and probe= type antenna, then at a glance one would know how each was performing, of c= ourse with the loop in the optimum direction for target signal. This is just a simple setup, it works well and no audio cross mod noticed, n= ice clean signals on display in spite of the fact that the separation is onl= y 50hz. A nice balanced mixer would be a more sophisticated approach, that might com= e later. 73 mal/g3kev ------=_NextPart_000_0030_01C9759E.C1BD9700 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
LF/MF
I am experimenting at present with antenna=20= (space=20 diversity) using two loops. Loop A is 40 metres perimeter vertical=20 orientation, Loop B is 190 metres perimeter also vertical.  Both l= oops=20 optimum E/W.
I am using two receivers in this experiment= Ant A=20 to Siemens D2155 level meter, BW 20 Hz and vy stable, Ant B to Datong u= p=20 converter and IC746 250 Hz BW. Both audio outputs to soundcard/ARGO display=20 allowing 50 hz separation for observation.
Observing DI2AM at present and having calib= rared=20 this signal on both RX outputs at a point in time, both signals are fai= rly=20 constant but more variations have been observed on Ant A - 40m loop, the sig= nal=20 surges in strength and then fades down, whereas Ant B has a more constant ou= tput=20 with less fade.
More time is needed for a proper assessment= and=20 DI2AM is also a strong signal. I would need a few long haul signals for a pr= oper=20 test like Russian or USA .
Interested in MF signals at=20 present.
This method would also work with a couple o= f small=20 loops or a loop and probe type antenna, then at a glance one would know how=20= each=20 was performing, of course with the loop in the optimum direction for target=20 signal.
 
This is just a simple setup, it works well=20= and no=20 audio cross mod noticed, nice clean signals on display in spite of the fact=20= that=20 the separation is only 50hz.
A nice balanced mixer would be a more sophi= sticated=20 approach, that might come later.
 
73 mal/g3kev
 
 
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