Return-Path: Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-md06.r1000.mx.aol.com (Internet Inbound) with ESMTP id 94E123800004C; Wed, 12 Sep 2012 12:32:51 -0400 (EDT) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1TBpqm-0007JD-RF for rs_out_1@blacksheep.org; Wed, 12 Sep 2012 17:31:40 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1TBpqm-0007J4-5i for rsgb_lf_group@blacksheep.org; Wed, 12 Sep 2012 17:31:40 +0100 Received: from mailout-de.gmx.net ([213.165.64.23]) by relay1.thorcom.net with smtp (Exim 4.77) (envelope-from ) id 1TBpqk-0003Li-EX for rsgb_lf_group@blacksheep.org; Wed, 12 Sep 2012 17:31:39 +0100 Received: (qmail invoked by alias); 12 Sep 2012 16:31:37 -0000 Received: from p4FEDA610.dip.t-dialin.net (EHLO Clemens04) [79.237.166.16] by mail.gmx.net (mp031) with SMTP; 12 Sep 2012 18:31:37 +0200 X-Authenticated: #17214767 X-Provags-ID: V01U2FsdGVkX1+nmbZ+nACngRgzMnO4YQVeXf3CC4SU45Zs7t2aAm 7fAJ26Lxu75eVA Message-ID: <017f01cd9104$14431610$1502a8c0@Clemens04> From: "Clemens Paul" To: Cc: References: <007901cd90f7$34e24ba0$0501a8c0@xphd97xgq27nyf> Date: Wed, 12 Sep 2012 18:31:33 +0200 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.3664 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.3664 X-Y-GMX-Trusted: 0 X-Spam-Score: -0.4 (/) X-Spam-Report: Spam detection software, running on the system "relay1.thorcom.net", has identified this incoming email as possible spam. The original message has been attached to this so you can view it (if it isn't spam) or label similar future email. If you have any questions, see the administrator of that system for details. Content preview: >You can use a class E/D amp in linear , with envelope restoration , that maintains >the efficiency , s/n >imd is about 35 dB . To my knowledge the first description in amateur literature of an EER (envelope elimination and restauration) PA (400W) was by DJ7AW in CQ-DL 4/2001. It's still in service. I have the article as pdf (in German) and can send it to anyone interested in building such a PA which is not an easy task.Therefore,as far as I know, only two such PAs have been built. One by DJ7AW and one in South America (Joe?). [...] Content analysis details: (-0.4 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at http://www.dnswl.org/, no trust [213.165.64.23 listed in list.dnswl.org] 0.0 FREEMAIL_FROM Sender email is commonly abused enduser mail provider (cpaul[at]gmx.net) -0.0 SPF_PASS SPF: sender matches SPF record -0.4 RP_MATCHES_RCVD Envelope sender domain matches handover relay domain 0.0 HTML_MESSAGE BODY: HTML included in message X-Scan-Signature: fb42d311bf65eb51bbb8124890b4f977 Subject: Re: LF: Fw: LOST TRACK Content-Type: multipart/alternative; boundary="----=_NextPart_000_0179_01CD9114.D5A75860" 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_40_50,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-global-disposition: G x-aol-sid: 3039ac1d605a5050b9330a43 X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : none This is a multi-part message in MIME format. ------=_NextPart_000_0179_01CD9114.D5A75860 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit >You can use a class E/D amp in linear , with envelope restoration , that maintains >the efficiency , s/n >imd is about 35 dB . To my knowledge the first description in amateur literature of an EER (envelope elimination and restauration) PA (400W) was by DJ7AW in CQ-DL 4/2001. It's still in service. I have the article as pdf (in German) and can send it to anyone interested in building such a PA which is not an easy task.Therefore,as far as I know, only two such PAs have been built. One by DJ7AW and one in South America (Joe?). 73 Clemens DL4RAJ ----- Original Message ----- From: Graham To: rsgb_lf_group@blacksheep.org Sent: Wednesday, September 12, 2012 5:17 PM Subject: Re: LF: Fw: LOST TRACK Mal, Things have moved on a bit You can use a class E/D amp in linear , with envelope restoration , that maintains the efficiency , s/n imd is about 35 dB . The Op structure allows for up to 50% loss of signal randomly along the time line , ie first 50% , last 50% or randomly distributed Problem with short burst is the 'average energy' level , like a radar , huge KW peak powers but only watts average power .....and yes , wide bandwidth . Detecting a carrier is one thing .. to recover data is a much more difficult thing and requires a higher level of energy G.. Virendatenbank: 2437/5264 - Ausgabedatum: 12.09.2012 ------=_NextPart_000_0179_01CD9114.D5A75860 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
>You  can  use a  class  = E/D   =20 amp  in linear , with  envelope  restoration  , = that =20 maintains  the  efficiency  , s/n   = >imd =20  is  about   35 dB .
 
To my knowledge the first description in amateur literature of = an
EER (envelope elimination and restauration) PA (400W) was by DJ7AW = in CQ-DL=20 4/2001.
It's still in service.
I have the article as pdf  (in German) and can send it to = anyone=20 interested in building such
a PA which is not an easy task.Therefore,as far as I = know, only=20 two such PAs have been built.
One by DJ7AW and one in South America (Joe?). 
 
 
73
Clemens
DL4RAJ
----- Original Message -----
From:=20 Graham
Sent: Wednesday, September 12, = 2012 5:17=20 PM
Subject: Re: LF: Fw: LOST = TRACK

Mal,
 
Things  have  moved on a bit
 
You  can  use a  class  E/D    = amp  in linear , with  envelope  restoration  , = that =20 maintains  the  efficiency  , s/n   = imd =20  is  about   35 dB .
 
The  Op structure allows for  up to  50% = loss =20 of  signal   randomly  along the  time  = line ,=20 ie  first 50% , last  50% or  randomly  = distributed
 
Problem with  short burst is the  'average energy' = level =20 , like a  radar  , huge KW peak  powers  but  = only  watts  average power .....and  yes  , = wide =20 bandwidth .
 
Detecting  a carrier  is one thing  .. to =20 recover  data is a much  more difficult  thing and=20 requires  a higher  level of energy
 
G..
 

 
 Virendatenbank: 2437/5264 - = Ausgabedatum:=20 12.09.2012
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