Return-Path: Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-dd02.r1000.mx.aol.com (Internet Inbound) with ESMTP id 1C90B38000083; Wed, 11 Jan 2012 09:01:39 -0500 (EST) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1Rkyj3-0001o9-M7 for rs_out_1@blacksheep.org; Wed, 11 Jan 2012 14:00:25 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1Rkyj3-0001o0-1O for rsgb_lf_group@blacksheep.org; Wed, 11 Jan 2012 14:00:25 +0000 Received: from mailout-de.gmx.net ([213.165.64.23]) by relay1.thorcom.net with smtp (Exim 4.63) (envelope-from ) id 1Rkyj0-0000Eb-4r for rsgb_lf_group@blacksheep.org; Wed, 11 Jan 2012 14:00:25 +0000 Received: (qmail invoked by alias); 11 Jan 2012 14:00:15 -0000 Received: from p4FD0A964.dip.t-dialin.net (EHLO Clemens04) [79.208.169.100] by mail.gmx.net (mp009) with SMTP; 11 Jan 2012 15:00:15 +0100 X-Authenticated: #17214767 X-Provags-ID: V01U2FsdGVkX19tex8l2q1tOzH/IVt64KHzoTYzSbiP6zl7Tk7aTs 81VqTce6hRaW6x Message-ID: <01a601ccd069$5817a5b0$1502a8c0@Clemens04> From: "Clemens Paul" To: References: <4F0CC679.2010206@charter.net> <4F0D81E5.4010602@iup.uni-heidelberg.de> Date: Wed, 11 Jan 2012 14:59:59 +0100 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: 0.0 (/) X-Spam-Report: autolearn=disabled,HTML_MESSAGE=0.001 Subject: LF: Re: QRP 1W /PA circuit Content-Type: multipart/alternative; boundary="----=_NextPart_000_01A2_01CCD071.B093F470" X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.8 required=5.0 tests=HTML_30_40,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: 1:2:465272608:93952408 X-AOL-SCOLL-URL_COUNT: 2 x-aol-sid: 3039ac1d408e4f0d96437dc2 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_01A2_01CCD071.B093F470 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 8bit Stefan, it is clearly visible here, abt 10dB over noise in a 70Hz BW and even weakly audible. 73 Clemens DL4RAJ Loc:Südostbayern,12,90006°O/48,4150°N (Gridloc:JN68KJ) http://no.nonsense.ee/qthmap/?qth=JN68KJ79WJ Perseus mit Dipol 2x46m ----- Original Message ----- From: Stefan Schäfer To: rsgb_lf_group@blacksheep.org Sent: Wednesday, January 11, 2012 1:34 PM Subject: LF: QRP 1W /PA circuit LF, Last night i shot my PA again :-( No replacement FETs were available so i had to stay quite during the night. Replacement parts are ordered now and will arrive tomorrow :-) During that time i will run a LF beacon on 136.172 kHz running 1W TX power in DFCW-90, starting in the afternoon. If someone can receive that weak QRPP signal, then a report is very apprechiated :-) Also i will do some optimisations on my recently posted PA output stage (http://dl.dropbox.com/u/19882028/LF/DK7FC_137kHz_TX_antenna_and_PA_schematic.jpg), just in case someone wants to build a similar design and is interested in general: -R= 100 Ohm/2W (In series with C, across Drain-Source) -C= 220pF/WIMA FKP-1 2kV (In series with R, across Drain-Source) -MOSFET: The IRFP460 will be replaced by a SPW20N60C3 :-) 73, Stefan/DK7FC ------------------------------------------------------------------------------ eMail ist virenfrei. Von AVG überprüft - www.avg.de Version: 10.0.1416 / Virendatenbank: 2109/4134 - Ausgabedatum: 10.01.2012 ------=_NextPart_000_01A2_01CCD071.B093F470 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Stefan,
 
it is clearly visible here, abt 10dB = over noise in=20 a 70Hz BW and even weakly audible.
 
73
Clemens
DL4RAJ
 
Loc:S=FCdostbayern,12,90006=B0O/48,4150=B0N=20 (Gridloc:JN68KJ)
http://no.nonsens= e.ee/qthmap/?qth=3DJN68KJ79WJ
Perseus=20 mit Dipol 2x46m
----- Original Message -----
From:=20 Stefan = Sch=E4fer
Sent: Wednesday, January 11, = 2012 1:34=20 PM
Subject: LF: QRP 1W /PA = circuit

LF,

Last night i shot my PA again :-( No = replacement=20 FETs were available so i had to stay quite during the night. = Replacement parts=20 are ordered now and will arrive tomorrow :-)

During that time i = will=20 run a LF beacon on 136.172 kHz running 1W TX power in = DFCW-90,=20 starting in the afternoon. If someone can receive that weak = QRPP=20 signal, then a report is very apprechiated :-)

Also i = will do=20 some optimisations on my recently posted PA output stage (http://dl.dropbox.com/u/19882028/LF/DK7FC_137kHz_TX_ante= nna_and_PA_schematic.jpg),=20 just in case someone wants to build a similar design and is interested = in=20 general:

-R=3D 100 Ohm/2W (In series with C, across =20 Drain-Source)
-C=3D 220pF/WIMA FKP-1 2kV  (In series with R, = across=20 Drain-Source)
-MOSFET: The I= RFP460=20 will be replaced by a SPW20N60C3=20 :-)

73, Stefan/DK7FC

eMail ist = virenfrei.
Von AVG=20 =FCberpr=FCft - www.avg.de
Version: 10.0.1416 /=20 Virendatenbank: 2109/4134 - Ausgabedatum: 10.01.2012=20

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