Return-Path: Received: from rly-mf02.mx.aol.com (rly-mf02.mail.aol.com [172.20.29.172]) by air-mf06.mail.aol.com (v123.4) with ESMTP id MAILINMF063-94849ca3cd514a; Wed, 25 Mar 2009 10:17:29 -0400 Received: from post.thorcom.com (post.thorcom.com [193.82.116.20]) by rly-mf02.mx.aol.com (v123.4) with ESMTP id MAILRELAYINMF026-94849ca3cd514a; Wed, 25 Mar 2009 10:16:55 -0400 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1LmTtz-0008Nm-DR for rs_out_1@blacksheep.org; Wed, 25 Mar 2009 14:16:19 +0000 Received: from [193.82.116.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1LmTtz-0008Nd-0M for rsgb_lf_group@blacksheep.org; Wed, 25 Mar 2009 14:16:19 +0000 Received: from n21.bullet.mail.ukl.yahoo.com ([87.248.110.138]) by relay1.thorcom.net with smtp (Exim 4.63) (envelope-from ) id 1LmTty-0002qM-Pt for rsgb_lf_group@blacksheep.org; Wed, 25 Mar 2009 14:16:18 +0000 Received: from [217.12.4.214] by n21.bullet.mail.ukl.yahoo.com with NNFMP; 25 Mar 2009 14:16:11 -0000 Received: from [87.248.111.190] by t1.bullet.ukl.yahoo.com with NNFMP; 25 Mar 2009 14:16:11 -0000 Received: from [127.0.0.1] by omp209.mail.ukl.yahoo.com with NNFMP; 25 Mar 2009 14:16:11 -0000 X-Yahoo-Newman-Property: ymail-3 X-Yahoo-Newman-Id: 890999.22434.bm@omp209.mail.ukl.yahoo.com Received: (qmail 98939 invoked by uid 60001); 25 Mar 2009 14:16:11 -0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=yahoo.co.uk; s=s1024; t=1237990571; bh=894R/yNmY8ZmYV3m/J9aWydA0fi+ED9O5MaCxxkQC8w=; h=Message-ID:X-YMail-OSG:Received:X-Mailer:Date:From:Reply-To:Subject:To:In-Reply-To:MIME-Version:Content-Type; b=jwiLGoZMJz/WOmqojniYPhg/gHDpGi2q3OU43vpF3h7ZKYjk2L96B3xUHONwbaaT8AKe3L/cP/pGC+j5DPvVLKapWot73ii8glMSqEyMASEOyzFqKw4er+D8lL13QOWes0WSMwU1YBUEiP2Q8uQXhRBamy4GOjy0vOKz2/LzjS0= DomainKey-Signature:a=rsa-sha1; q=dns; c=nofws; s=s1024; d=yahoo.co.uk; h=Message-ID:X-YMail-OSG:Received:X-Mailer:Date:From:Reply-To:Subject:To:In-Reply-To:MIME-Version:Content-Type; b=45XiBlVsKhpHDIoJYegRZDN6cwEsAU4R0dO8pvoF4MgqS2/AocBg83ANTqsnsEY/19NzReuH8Zo2aQabprnfy6XOsYZkU3YVJp9tLAbH6H5rojGpZdiSFHoynOjfonhmDF774S8qyG493eUI5jfIx/tmOB5X9C7L+1iobLxzkkM=; Message-ID: <677752.98902.qm@web24711.mail.ird.yahoo.com> X-YMail-OSG: k.upffsVM1m5rFXbwoOyg2UxdUCRoMrDyx2iPpO6W_JmRZRWEg5JC4nqLcbubGp84DGRhrk2p173GdSehvnPbcqoMzkO1UWMECuGMB8XnAqxCv0T6M7maPkvQQLWYqTEW0NVAuQK_sookWVjL0vMZuVcUbOyCLj238HtuP6NBS8ZyeijcgmBn4ZvMfic8ftPRveyzyHi4s3KjYWFlrSrt21hqMY- Received: from [213.78.182.231] by web24711.mail.ird.yahoo.com via HTTP; Wed, 25 Mar 2009 07:16:11 PDT X-Mailer: YahooMailWebService/0.7.289.1 Date: Wed, 25 Mar 2009 07:16:11 -0700 (PDT) From: brian hodgson To: rsgb_lf_group@blacksheep.org In-Reply-To: MIME-Version: 1.0 X-Karma: unknown: DomainKey-Status: good (testing) Subject: Re: LF: TDA2003, TDA2030 for PA? Content-Type: multipart/alternative; boundary="0-1929832997-1237990571=:98902" 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-IP: 193.82.116.20 X-AOL-SCOLL-AUTHENTICATION: mail_rly_antispam_dkim-m221.2 ; domain : yahoo.co.uk DKIM : fail --0-1929832997-1237990571=:98902 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: quoted-printable Hi Petr -=20 =A0 I use the TDA2030 as a=A0pre-amplifier to produce a few watts in my 136 kHz=20= linear PA. The spec implies that it should still have some useful gain at 50= 0 kHz - I'll be most interested to hear how you get on. =A0 =A0 Regards - Brian (G3YKB) --- On Wed, 25/3/09, Petr Mal=FD wrote: From: Petr Mal=FD Subject: LF: TDA2003, TDA2030 for PA? To: rsgb_lf_group@blacksheep.org Date: Wednesday, 25 March, 2009, 1:38 PM Hi all, =A0 My intention is to build a small transmitter up to some 10W=A0for 136 and 50= 5 kHz, this time not the D class, but B or AB class. I think of employing AF amplifiers such as TDA2003, TDA2030, or similar. Of=20= course, mainly 505 kHz is rather out of range so that nothing is guaranteed.= This is why I ask before experimenting. Did anybody try to use these for 136/505 kHz? =A0 Tks, 73, Petr, OK!FIG http://ok1fig.nagano.cz =A0 =A0 =20 --0-1929832997-1237990571=:98902 Content-Type: text/html; charset=iso-8859-1 Content-Transfer-Encoding: quoted-printable =
Hi Petr -
 
I use the TDA2030 as a pre-amplifier to produce a few watts in my=20= 136 kHz linear PA. The spec implies that it should still have some useful ga= in at 500 kHz - I'll be most interested to hear how you get on.  
 
Regards - Brian (G3YKB)

--- On Wed, 25/3/09, Petr Mal=FD &= lt;p.maly@gmc.net> wrote:
From: Petr Mal=FD <p.maly@gmc.net>
Subject: LF= : TDA2003, TDA2030 for PA?
To: rsgb_lf_group@blacksheep.org
Date: Wedn= esday, 25 March, 2009, 1:38 PM

Hi all,
 
My intention is to build a small transmitte= r up to some 10W for 136 and 505 kHz, this time not the D class, but B=20= or AB class.
I think of employing AF amplifiers such as=20= TDA2003, TDA2030, or similar. Of course, mainly 505 kHz is rather out of ran= ge so that nothing is guaranteed. This is why I ask before experimenting.
Did anybody try to use these for 136/505 kH= z?
 
Tks, 73, Petr, OK!FIG
 
 

=20 --0-1929832997-1237990571=:98902--