Return-Path: Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-dg01.r1000.mx.aol.com (Internet Inbound) with ESMTP id A96AA38000092; Thu, 28 Jun 2012 11:56:05 -0400 (EDT) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1SkH3d-0006nJ-Lm for rs_out_1@blacksheep.org; Thu, 28 Jun 2012 16:55:01 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1SkH3c-0006n8-N3 for rsgb_lf_group@blacksheep.org; Thu, 28 Jun 2012 16:55:00 +0100 Received: from relay2.uni-heidelberg.de ([129.206.210.211]) by relay1.thorcom.net with esmtps (TLSv1:AES256-SHA:256) (Exim 4.77) (envelope-from ) id 1SkH3Z-0003ZG-Q2 for rsgb_lf_group@blacksheep.org; Thu, 28 Jun 2012 16:54:59 +0100 Received: from freitag.iup.uni-heidelberg.de (freitag.iup.uni-heidelberg.de [129.206.29.204]) by relay2.uni-heidelberg.de (8.13.8/8.13.8) with ESMTP id q5SFsuqU001953 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO) for ; Thu, 28 Jun 2012 17:54:57 +0200 Received: from [129.206.22.206] (pc206.iup.uni-heidelberg.de [129.206.22.206]) by freitag.iup.uni-heidelberg.de (8.12.11.20060308/8.11.2) with ESMTP id q5SFsuRi003175 for ; Thu, 28 Jun 2012 17:54:56 +0200 Message-ID: <4FEC7DDF.8050906@iup.uni-heidelberg.de> Date: Thu, 28 Jun 2012 17:53:03 +0200 From: =?UTF-8?B?U3RlZmFuIFNjaMOkZmVy?= User-Agent: Mozilla/5.0 (Windows; U; Windows NT 6.1; de; rv:1.9.1.8) Gecko/20100227 Thunderbird/3.0.3 MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org References: <4FEB8A2F.3030504@iup.uni-heidelberg.de> <7E7DFBB4D102A04DB5ADC88D66628A4A0FAB65D1@ICTS-S-MBX5.luna.kuleuven.be> <82ECFF6D94B94BED9D93B5580549A409@Extensa> <1340872602.49196.YahooMailNeo@web171602.mail.ir2.yahoo.com> <4FEC18F4.9050608@online.fr> <1340875355.96079.YahooMailNeo@web171602.mail.ir2.yahoo.com> <1340876781.29716.YahooMailNeo@web171601.mail.ir2.yahoo.com> In-Reply-To: <1340876781.29716.YahooMailNeo@web171601.mail.ir2.yahoo.com> X-Spam-Score: -2.3 (--) 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 MF, Late at night, i made draw the schematic. Here it is: https://dl.dropbox.com/u/19882028/MF/100W%20475kHz%20PA.png (picture of prototype https://dl.dropbox.com/u/19882028/MF/DK7FC%20472%20kHz%20PA%2015W%2B100W.JPG) [...] Content analysis details: (-2.3 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -2.3 RCVD_IN_DNSWL_MED RBL: Sender listed at http://www.dnswl.org/, medium trust [129.206.210.211 listed in list.dnswl.org] -0.0 T_RP_MATCHES_RCVD Envelope sender domain matches handover relay domain 0.0 HTML_MESSAGE BODY: HTML included in message X-Scan-Signature: 8044ff87f22777286b33afb193e0811f Subject: Re: LF: Re: RE: 472 kHz PA running at 12 VDC Content-Type: multipart/alternative; boundary="------------070101020709040309030703" X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.7 required=5.0 tests=HTML_40_50,HTML_FONTCOLOR_BLUE, HTML_FONT_BIG,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-SCORE: 0:2:485622592:93952408 X-AOL-SCOLL-URL_COUNT: 0 x-aol-sid: 3039ac1d41094fec7e95132f X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : none This is a multi-part message in MIME format. --------------070101020709040309030703 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: quoted-printable X-MIME-Autoconverted: from 8bit to quoted-printable by relay2.uni-heidelberg.de id q5SFsuqU001953 Hi MF, Late at night, i made draw the schematic. Here it is:=20 https://dl.dropbox.com/u/19882028/MF/100W%20475kHz%20PA.png (picture of=20 prototype=20 https://dl.dropbox.com/u/19882028/MF/DK7FC%20472%20kHz%20PA%2015W%2B100W.= JPG) Most of the parts are not critical. The ferrite cores are the blue EPCOS types, N30 material. Details are in=20 the image. But you may use a FT140-77 alternatively and double the=20 primary and secondary number of turns. There are many alternatives, also to the FETs. Instead of the IRZF48N=20 you may try a IRF1405. This one has a lower on-resistance but a higher=20 input capacity. Maybe it works even better, i didn't try to many parts.=20 Switching times are not critical. So you need to find a compromise=20 between low on resistance and input capacity while the Drain-Source=20 voltage should be 55V for a 12V supply. Instead of RF litz wire (i use this one:=20 http://www.reichelt.de/index.html?ACTION=3D3;ARTICLE=3D57206;SEARCH=3DCLI= %20200%2F30=20 ) you can also use 1mm diam. enamel. Cu wire or better 5x0.4mm or what=20 you have. It just affects the efficiency, more or less. The overall dimensions of this prototype are 15cm x 10cm x 3cm, so it is=20 quite compact and since it runs from a 12V battery you can use it for /p=20 tests. Also you can of course use more than 2 power steps by using a=20 multi step switch and more taps. A DDS signal generator with rectangular wave form or a sine signal=20 coming from a HF TX may be used. The waveform doesn't matter as long as=20 the peak input voltage exceeds 5 Vp. 73, Stefan/DK7FC PS: Yes, it is nothing new and someone has done it before! Am 28.06.2012 11:46, schrieb M0FMT: > Hi again Stefan > The Litz is too, only by the Km or 10Kg reel.......... :@(( > Do you create your own I have 0.125 solid C/E guess that could be=20 > stranded up to make a synth? > > 73 es GL Pete M0FMT IO91UX > *From:* M0FMT > *To:* "rsgb_lf_group@blacksheep.org" > *Sent:* Thursday, 28 June 2012, 10:22 > *Subject:* Re: LF: Re: RE: 472 kHz PA running at 12 VDC > > Hi Stefan > http://www.ebay.co.uk/itm/IRFZ24N-Transistor-x-1-pieces-IRFZ24-/1608182= 53496?pt=3DUK_BOI_Electrical_Components_Supplies_ET&hash=3Ditem257183ceb8= =20 > > Just over =C2=A35 a pop! > http://www.ebay.co.uk/itm/NEW-ICL7667CPA-MAXIM-IC-DRIVER-MOSFET-DUAL-PW= R-8-DIP-1-PIECE-B7-/160779362423?pt=3DLH_DefaultDomain_0&hash=3Ditem256f3= 26077=20 > > Just over =C2=A36 a pop! > But what is the =E2=80=9CUnobtainium=E2=80=9D ferrite? =E2=80=A6=E2=80=A6= ;0) > Chees Pete FMT > *From:* Jean-Pierre M=C3=A9r=C3=A9 > *To:* rsgb_lf_group@blacksheep.org > *Sent:* Thursday, 28 June 2012, 9:42 > *Subject:* Re: LF: Re: RE: 472 kHz PA running at 12 VDC > > Hello Stephan , > Me too > 73 , Jean-Pierre F1AFJ > > > > Le 28/06/2012 10:36, M0FMT a =C3=A9crit : >> Hi Stephan >> Me Too >> >> 73 es GL Pete M0FMT IO91UX >> *From:* "PA1SDB, Peter" mailto:pa1sdb@amsat.org >> *To:* rsgb_lf_group@blacksheep.org >> *Sent:* Thursday, 28 June 2012, 9:12 >> *Subject:* LF: Re: RE: 472 kHz PA running at 12 VDC >> >> like >> >> ----- Original Message ----- >> *From:* Rik Strobbe >> *To:* rsgb_lf_group@blacksheep.org >> >> *Sent:* Thursday, June 28, 2012 6:35 AM >> *Subject:* LF: RE: 472 kHz PA running at 12 VDC >> >> //If/ someone is interested i may convert the >> circuit from my mind into a schematic as a png file./ >> Always interested ;-) >> 73, Rik ON7YD - OR7T >> >> >> > > > > > > --------------070101020709040309030703 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable X-MIME-Autoconverted: from 8bit to quoted-printable by relay2.uni-heidelberg.de id q5SFsuqU001953 Hi MF,

Late at night, i made draw the schematic. Here it is: https://dl.dropbox.com/u/19882028/MF/100W%= 20475kHz%20PA.png=C2=A0 (picture of prototype https://dl.dropbox.com/u/= 19882028/MF/DK7FC%20472%20kHz%20PA%2015W%2B100W.JPG)

Most of the parts are not critical.

The ferrite cores are the blue EPCOS types, N30 material. Details are in the image. But you may use a FT140-77 alternatively and double the primary and secondary number of turns.

There are many alternatives, also to the FETs. Instead of the IRZF48N you may try a IRF1405. This one has a lower on-resistance but a higher input capacity. Maybe it works even better, i didn't try to many parts. Switching times are not critical. So you need to find a compromise between low on resistance and input capacity while the Drain-Source voltage should be 55V for a 12V supply.

Instead of RF litz wire (i use this one: http://www.reiche= lt.de/index.html?ACTION=3D3;ARTICLE=3D57206;SEARCH=3DCLI%20200%2F30 ) you can also use 1mm diam. enamel. Cu wire or better 5x0.4mm or what you have. It just affects the efficiency, more or less.

The overall dimensions of this prototype are 15cm x 10cm x 3cm, so it is quite compact and since it runs from a 12V battery you can use it for /p tests. Also you can of course use more than 2 power steps by using a multi step switch and more taps.

A DDS signal generator with rectangular wave form or a sine signal coming from a HF TX may be used. The waveform doesn't matter as long as the peak input voltage exceeds 5 Vp.

73, Stefan/DK7FC

PS: Yes, it is nothing new and someone has done it before!






Am 28.06.2012 11:46, schrieb M0FMT:
Hi again Stefan
=C2=A0
The Litz is too, only by the Km or 10Kg reel.......... :@((<= /span>
=C2=A0
Do you create your own I have 0.125 solid C/E guess that could be stranded up to make a synth?

=C2=A0
73 es GL Pete M0FMT IO91UX
From: M0FMT <= m0fmt@yahoo.co.uk>
To: "rsgb_lf_group@blacksheep.org" <rsgb_lf_group@blacks= heep.org>
Sent: Thursday, 28 June 2012, 10:22
Subject: Re: LF: Re: RE: 472 kHz PA running at 12 VDC

Hi Stefan
= Just over =C2=A35 a pop!
= Just over =C2=A36 a pop!
But what is the =E2=80=9CUnobtainium=E2=80=9D ferrite?=C2= =A0=C2=A0 =E2=80=A6=E2=80=A6 ;0)
<= font size=3D"3">Chees Pete FMT
=C2=A0= =C2=A0 From: Jean-Pierre M=C3=A9r=C3=A9 &l= t;jpm.f1afj@online.fr>
To: rsgb_lf_group@blacksheep.org
Sent: Thursday, 28 June 2012, 9:42
Subject: Re: LF: Re: RE: 472 kHz PA running at 12 VDC

Hello Stephan ,
Me too
73=C2=A0 , Jean-Pierre F1AFJ=C2=A0



Le 28/06/2012 10:36, M0FMT a =C3=A9crit=C2=A0:
Hi Stephan
=C2=A0
Me Too

73 es GL Pete M0FMT IO91UX
From: "PA1SDB, Peter" mailto:pa1sdb@amsat.org
To: rsgb_l= f_group@blacksheep.org
Sent: Thursday, 28 June 2012, 9:12
Subject: LF: Re: RE: 472 kHz PA running at 12 VDC

like
=C2=A0
----- Original Message -----
Sent: Thursday, June 28, 2012 6:35 AM
Subject: LF: RE: 472 kHz PA running at 12 VDC

If=C2=A0someo= ne is=C2=A0interested i=C2=A0may=C2=A0convert the circuit=C2=A0from=C2=A0my=C2= =A0mind=C2=A0into a schematic as a=C2=A0png file.
=C2=A0
Always=C2=A0interested ;-)
=C2=A0
73, Rik=C2=A0=C2=A0ON7YD - OR= 7T








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