Return-Path: Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-mb01.r1000.mx.aol.com (Internet Inbound) with ESMTP id 145543800009A; Wed, 12 Sep 2012 18:41:47 -0400 (EDT) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1TBvbY-0000yP-E1 for rs_out_1@blacksheep.org; Wed, 12 Sep 2012 23:40:20 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1TBvbX-0000yG-F9 for rsgb_lf_group@blacksheep.org; Wed, 12 Sep 2012 23:40:19 +0100 Received: from nm9.bullet.mail.ukl.yahoo.com ([217.146.182.250]) by relay1.thorcom.net with smtp (Exim 4.77) (envelope-from ) id 1TBvbU-00050u-1n for rsgb_lf_group@blacksheep.org; Wed, 12 Sep 2012 23:40:18 +0100 Received: from [217.12.10.89] by nm9.bullet.mail.ukl.yahoo.com with NNFMP; 12 Sep 2012 22:40:15 -0000 Received: from [217.146.183.205] by tm19.bullet.mail.ukl.yahoo.com with NNFMP; 12 Sep 2012 22:40:15 -0000 Received: from [127.0.0.1] by omp1003.bt.mail.ukl.yahoo.com with NNFMP; 12 Sep 2012 22:40:15 -0000 X-Yahoo-Newman-Id: 260328.60894.bm@omp1003.bt.mail.ukl.yahoo.com Received: (qmail 6218 invoked from network); 12 Sep 2012 22:40:15 -0000 DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=s1024; d=btinternet.com; h=DKIM-Signature:X-Yahoo-Newman-Property:X-YMail-OSG:X-Yahoo-SMTP:Received:From:To:Subject:Date:Message-ID:MIME-Version:Content-Type:X-Priority:X-MSMail-Priority:X-Mailer:In-Reply-To:Importance:X-MimeOLE:Thread-Index; b=oBb43yBfeL05IWy1DzkoYSIRwqG4gt1Y6XNAwKDnm6bDrA9D0COyhy5frc+newRk/JHmRATS6vsT9hIhN45RtwGfOB5beqoAWgJFGpF0q23lssJWhXoV1PcxvodhvVqudFvsrclvjhfEYIYVqe7X97RpUdAalK6pUQRTmXbsDwk= ; DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=btinternet.com; s=s1024; t=1347489615; bh=SIVPXrltymv+pfqdqOtYSjmxlGKKIV395DrAuIXaXQ0=; h=X-Yahoo-Newman-Property:X-YMail-OSG:X-Yahoo-SMTP:Received:From:To:Subject:Date:Message-ID:MIME-Version:Content-Type:X-Priority:X-MSMail-Priority:X-Mailer:In-Reply-To:Importance:X-MimeOLE:Thread-Index; b=RWTIlBPFGk7yqEOn3F91zIgsZKDPxUOXay9o0XAQJ2blz0AShQtqKjmvdZMfpVniGxocVip5N3JX4QNBNB1mJCNo6PCp7HUqYYLWsux/sLqLT2jTbcW0vFHpP7DNpNPOv67A9wE9IsX/uV+IudvYzoRwAtwYXiJu7Ucm2v2Oe9E= X-Yahoo-Newman-Property: ymail-3 X-YMail-OSG: YmMbPj8VM1lS0_KFeeNTWKK7uzQph3q9y1N7PPmlnuE5Sgy Suavlf6rfC5wX8Xuw3_B_b_YsrtlLzh2_wvnjORTNVSj0sLdXhhlZzbdUYMM h7fAkK3Hiiq1ZlEacHo9gnVkKhKh4qFH3pziiPntzlq0AWVuDS6jzinziaTJ 81fmLgjRn.Ol8F71uK2AUFmClSfsIba.R4zJ93WR3wtnc1x3OTqmmd9ZLlqP 7txMWi0_chkUA0mizU37chj1aEd_JAAh8jU0lGXFQfz_gMhsZxznzeGiiEWd ycwkR5fGxlVzz20BaHO.CmnpPbWmvN7gLnBnNlDpPi.XBWyYDi6TeMSHU0kP DSDElkKV5qcStYGzBxOSaHHq_i7zVmWNdXzhjx1hRZUF609o.htnJTDkOlgl 4rtmKH5aSFSSlvSQAQ0MzbM1bNAcVi6uS85b23K0Eeq6ZnH5GQhoa4lnevR8 QmzNdA8dJJ3ADwFykXfW.gNApfriUNBcY8KuwomV0hFuom2Ln1fyrRvpZQBZ jm06jp6T3_5BmAg-- X-Yahoo-SMTP: jIHg8s6swBCCPeDY68q8wqV0WfySXXI4RDlApk1jFwSrbKAdvOK6 Received: from inspiron (hudsonville@86.145.184.130 with login) by smtp820.mail.ird.yahoo.com with SMTP; 12 Sep 2012 22:40:14 +0000 GMT From: "Lee Hudson" To: Date: Wed, 12 Sep 2012 23:40:14 +0100 Message-ID: <7BC98E57810B4E9DBE3F6FF425538CFE@inspiron> MIME-Version: 1.0 X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.6863 In-Reply-To: Importance: Normal X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.6157 Thread-Index: Ac2RBhOzWkHLgIQWROahbigaHVj2UwAK+4kg 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: Hi Graham, All, I made an EER PA and Transverter to 3.5MHz for use on 500kHz based on Jim's first design. And I'm sure there are a few others about. [...] 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 [217.146.182.250 listed in list.dnswl.org] 0.0 HTML_MESSAGE BODY: HTML included in message 0.0 T_DKIM_INVALID DKIM-Signature header exists but is not valid 0.0 UNPARSEABLE_RELAY Informational: message has unparseable relay lines X-Scan-Signature: 03d370112362b39e5e8a9c205930d2fd Subject: RE: LF: Fw: LOST TRACK Content-Type: multipart/alternative; boundary="----=_NextPart_000_0034_01CD913F.F55C81A0" X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: * X-Spam-Status: No, hits=1.8 required=5.0 tests=FORGED_MUA_OUTLOOK,HTML_60_70, HTML_FONTCOLOR_UNKNOWN,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-SCOLL-AUTHENTICATION: mtain-mb01.r1000.mx.aol.com ; domain : btinternet.com DKIM : pass x-aol-sid: 3039ac1d601550510fab09b3 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_0034_01CD913F.F55C81A0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Hi Graham, All, =20 I made an EER PA and Transverter to 3.5MHz for use on 500kHz based on = Jim's first design. And I'm sure there are a few others about. =20 First prototype of Class D PA https://dl.dropbox.com/u/15400416/IMGP0336.JPG =20 3.5MHz to 500kHz Transverter with Phase and Envelope outputs to PA https://dl.dropbox.com/u/15400416/IMGP0371.JPG =20 Switchable 50 or 200W EER PA with automatic protection https://dl.dropbox.com/u/15400416/IMGP0415.JPG =20 LPF and TX/RX Relay https://dl.dropbox.com/u/15400416/IMGP0414.JPG =20 Final Trio https://dl.dropbox.com/u/15400416/IMGP0385.JPG =20 Works a treat on all the usual modes and is even quite respectable on = SSB. 90% efficient on full output.=20 =20 Stefan's attempt at a switched mode envelope supply sounds interesting, = and a nice way to get mid power efficiency up. =20 73, Lee M0LMH. =20 =20 =20 -----Original Message----- From: owner-rsgb_lf_group@blacksheep.org [mailto:owner-rsgb_lf_group@blacksheep.org] On Behalf Of Graham Sent: 12 September 2012 17:45 To: rsgb_lf_group@blacksheep.org Subject: Re: LF: Fw: LOST TRACK =20 Jim M0BMU =20 =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 =20 G.. =20 =20 PS :: I vote for Jims design ! =20 =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 =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 =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 =20 =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 =20 Mal, =20 Things have moved on a bit=20 =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 =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 =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 . =20 Detecting a carrier is one thing .. to recover data is a much more difficult thing and requires a higher level of energy=20 =20 G.. =20 =20 Virendatenbank: 2437/5264 - Ausgabedatum: 12.09.2012=20 ------=_NextPart_000_0034_01CD913F.F55C81A0 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Hi Graham, All,

 

I made an EER PA and Transverter to = 3.5MHz for use on 500kHz based on Jim’s first design.

And I’m sure there are a few = others about.

 

First prototype of Class D = PA

https://dl.dropbo= x.com/u/15400416/IMGP0336.JPG

 

3.5MHz to 500kHz Transverter with = Phase and Envelope outputs to PA

https://dl.dropbo= x.com/u/15400416/IMGP0371.JPG

 

Switchable 50 or 200W EER PA with = automatic protection

https://dl.dropbo= x.com/u/15400416/IMGP0415.JPG

 

LPF and TX/RX = Relay

https://dl.dropbo= x.com/u/15400416/IMGP0414.JPG

 

Final Trio

https://dl.dropbo= x.com/u/15400416/IMGP0385.JPG

 

Works a treat on all the usual = modes and is even quite respectable on SSB.

90% efficient on full output. =

 

Stefan’s attempt at a = switched mode envelope supply sounds interesting, and a nice way to get mid power efficiency = up.

 

73, Lee M0LMH.

 

 

 

-----Original Message-----
From: owner-rsgb_lf_group@blacksheep.org = [mailto:owner-rsgb_lf_group@blacksheep.org] On Behalf Of Graham
Sent: 12 September 2012 = 17:45
To: = rsgb_lf_group@blacksheep.org
Subject: Re: LF: Fw: LOST = TRACK

 

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 .... ?

 

G..  =

 

PS ::  I = vote  for  Jims  design   ! 

 

From: Clemens Paul

Sent: Wednesday, September 12, 2012 5:31 = PM

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 .

 

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

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

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