Return-Path: Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-di01.r1000.mx.aol.com (Internet Inbound) with ESMTP id 6DB4838000084; Wed, 12 Sep 2012 12:45:47 -0400 (EDT) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1TBq3d-0007XQ-V6 for rs_out_1@blacksheep.org; Wed, 12 Sep 2012 17:44:57 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1TBq3d-0007XH-9x for rsgb_lf_group@blacksheep.org; Wed, 12 Sep 2012 17:44:57 +0100 Received: from smtpout4.wanadoo.co.uk ([80.12.242.68] helo=smtpout.wanadoo.co.uk) by relay1.thorcom.net with esmtp (Exim 4.77) (envelope-from ) id 1TBq3b-0003fs-0t for rsgb_lf_group@blacksheep.org; Wed, 12 Sep 2012 17:44:56 +0100 Received: from AGB ([2.26.22.87]) by mwinf5d49 with ME id yGkq1j00B1skBk203Gkq6j; Wed, 12 Sep 2012 18:44:54 +0200 Message-ID: From: "Graham" To: References: <007901cd90f7$34e24ba0$0501a8c0@xphd97xgq27nyf> <017f01cd9104$14431610$1502a8c0@Clemens04> In-Reply-To: <017f01cd9104$14431610$1502a8c0@Clemens04> Date: Wed, 12 Sep 2012 17:44:50 +0100 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal Importance: Normal X-Mailer: Microsoft Windows Live Mail 14.0.8117.416 X-MimeOLE: Produced By Microsoft MimeOLE V14.0.8117.416 X-Spam-Score: 0.0 (/) 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: Jim M0BMU Published a design and made a working system ........ he also eliminated the need for a complicated drive by using complimentary out put devices ... I don't know who else made such a thing .... ? [...] Content analysis details: (0.0 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at http://www.dnswl.org/, no trust [80.12.242.68 listed in list.dnswl.org] 0.0 HTML_MESSAGE BODY: HTML included in message X-Scan-Signature: 7a302ec14fb4a62f16f049454b6dc54d Subject: Re: LF: Fw: LOST TRACK Content-Type: multipart/alternative; boundary="----=_NextPart_000_0012_01CD910E.4F130A70" X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.6 required=5.0 tests=HTML_40_50,HTML_MESSAGE, MISSING_OUTLOOK_NAME 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: 3039ac1da6055050bc3a6c53 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_0012_01CD910E.4F130A70 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Jim M0BMU =20 Published a design and made a working system ........ he also = eliminated the need for a complicated drive by using = complimentary out put devices ... I don't know who else made such = a thing .... ?=20 G.. =20 PS :: I vote for Jims design ! =20 From: Clemens Paul=20 Sent: Wednesday, September 12, 2012 5:31 PM To: rsgb_lf_group@blacksheep.org=20 Cc: rsgb_lf_group@yahoogroups.co.uk=20 Subject: Re: LF: Fw: LOST TRACK >You can use a class E/D amp in linear , with envelope = restoration , that maintains the efficiency , s/n >imd is = about 35 dB .=20 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?).=20 73 Clemens DL4RAJ ----- Original Message -----=20 From: Graham=20 To: rsgb_lf_group@blacksheep.org=20 Sent: Wednesday, September 12, 2012 5:17 PM Subject: Re: LF: Fw: LOST TRACK Mal, Things have moved on a bit=20 You can use a class E/D amp in linear , with envelope = restoration , that maintains the efficiency , s/n imd is about = 35 dB .=20 The Op structure allows for up to 50% loss of signal randomly = along the time line , ie first 50% , last 50% or randomly = distributed=20 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=20 G.. =20 Virendatenbank: 2437/5264 - Ausgabedatum: 12.09.2012 ------=_NextPart_000_0012_01CD910E.4F130A70 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Jim M0BMU  
 
Published  a  design  and  made a working  = system  ........  he  also  eliminated the  = need =20 for  a complicated   drive  by using =20 complimentary   out put  devices  ... I don't = know  who=20 else  made such a thing .... ?
 
G.. 
 
PS ::  I vote  for  Jims =20 design   ! 

Sent: Wednesday, September 12, 2012 5:31 PM
To: rsgb_lf_group@blacksheep.org= =20
Subject: Re: LF: Fw: LOST TRACK

>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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