Return-Path: X-Spam-DCC: paranoid 1290; Body=2 Fuz1=2 Fuz2=2 X-Spam-Checker-Version: SpamAssassin 3.1.3 (2006-06-01) on lipkowski.org X-Spam-Level: * X-Spam-Status: No, score=1.6 required=5.0 tests=BAYES_00,FORGED_MUA_OUTLOOK, HTML_50_60,HTML_MESSAGE autolearn=no version=3.1.3 Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by paranoid.lipkowski.org (8.13.7/8.13.7) with ESMTP id s8JHRJuS008964 for ; Fri, 19 Sep 2014 19:27:21 +0200 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1XV1sn-0003OK-Dt for rs_out_1@blacksheep.org; Fri, 19 Sep 2014 18:22:09 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1XV1sm-0003OB-Og for rsgb_lf_group@blacksheep.org; Fri, 19 Sep 2014 18:22:08 +0100 Received: from smtp6-g21.free.fr ([212.27.42.6]) by relay1.thorcom.net with esmtps (TLSv1.2:DHE-RSA-AES256-GCM-SHA384:256) (Exim 4.82) (envelope-from ) id 1XV1sk-00030c-HL for rsgb_lf_group@blacksheep.org; Fri, 19 Sep 2014 18:22:07 +0100 Received: from PCFIXE (unknown [80.215.138.50]) (Authenticated sender: f6hcc56) by smtp6-g21.free.fr (Postfix) with ESMTPSA id B551C8232D for ; Fri, 19 Sep 2014 19:22:00 +0200 (CEST) Message-ID: <17834603B093461FB4EDDCE192392DAB@PCFIXE> From: "F6HCC" To: References: <000301cfd3d1$8c53ee10$a4fbca30$@otenet.gr> <541C2031.5020902@gmail.com> <541C3237.6080206@gmail.com> Date: Fri, 19 Sep 2014 19:06:20 +0200 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.5512 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.5512 X-Scan-Signature: 18c0ce4cbca80559a8b22b14cd653174 Subject: LF: Re: Breaking ground loops in PC-sound cards Content-Type: multipart/alternative; boundary="----=_NextPart_000_0004_01CFD43C.CBFA52A0" 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-Scanned-By: MIMEDefang 2.56 on 10.1.3.10 Status: O X-Status: X-Keywords: X-UID: 455 This is a multi-part message in MIME format. ------=_NextPart_000_0004_01CFD43C.CBFA52A0 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Hi Stefan, all, In the past I used the ADuM1100 to isolate some instruments on a sailing = boat. And I was surprised that the GPS receiver losed the satellites... Examining with a spectrum analyzer I saw spurious from abt 600 MHz to = more than 2 GHz spaced abt 3 MHz... It was the ADuM causing the QRM at 5 meters up to the GPS antenna ! Now perhaps the defect is fixed with the new references... As a precaution verify the WiFi link (and GPS if present) when the ADuM = works... :) 73, Jean / F6HCC ----- Original Message -----=20 From: DK7FC=20 To: rsgb_lf_group@blacksheep.org=20 Sent: Friday, September 19, 2014 3:40 PM Subject: LF: Breaking ground loops in PC-sound cards Hi all,=20 We all know the problems with QRM on the VLF/LF/MF devices in = combination with computers. Sometimes even with good grounding, adding = loads of common mode chokes, some QRM remains.=20 At work i just jumped over that device: ADuM4160 I can very well imagine there are many of you (as well as me) who = would benefit at least a bit when using that device. Worth to play with? 73, Stefan/DK7FC PS: Maybe be used in combination with an ADuM5000 as shown in this = image: = http://www.dajac.com/blog/wp-content/uploads/2009/07/adi_usb_isolator_416= 0_circuit.png if that doesn't add QRM again... ------=_NextPart_000_0004_01CFD43C.CBFA52A0 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable =EF=BB=BF
Hi Stefan, all,
 
In the past I used the ADuM1100 to = isolate some=20 instruments on a sailing boat.
And I was surprised that the GPS = receiver losed the=20 satellites...
Examining with a spectrum analyzer = I saw=20 spurious from abt 600 MHz to more than 2 GHz spaced abt 3 = MHz...
It was the ADuM causing the QRM at 5 = meters up=20 to the GPS antenna !
Now perhaps the defect is fixed with = the new=20 references...
As a precaution verify the WiFi link = (and GPS if=20 present) when the ADuM works... :)
 
73, Jean / F6HCC
 
----- Original Message -----
From:=20 DK7FC=20
Sent: Friday, September 19, = 2014 3:40=20 PM
Subject: LF: Breaking ground = loops in=20 PC-sound cards

Hi all,

We all know the problems with QRM on = the=20 VLF/LF/MF devices in combination with computers. Sometimes even with = good=20 grounding, adding loads of common mode chokes, some QRM remains. =
At work i=20 just jumped over that device: ADuM4160

I=20 can very well imagine there are many of you (as well as me) who would = benefit=20 at least a bit when using that device.

Worth to play = with?

73,=20 Stefan/DK7FC

PS: Maybe be used in combination with an ADuM5000=20 as shown in this image: http://www.dajac.com/blog/wp-content/uploads/2009/= 07/adi_usb_isolator_4160_circuit.png=20 if that doesn't add QRM again...
------=_NextPart_000_0004_01CFD43C.CBFA52A0--