Return-Path: Received: from rly-dd04.mx.aol.com (rly-dd04.mail.aol.com [172.19.141.151]) by air-dd04.mail.aol.com (v123.4) with ESMTP id MAILINDD041-b7649e46cb73da; Tue, 14 Apr 2009 07:00:28 -0400 Received: from post.thorcom.com (post.thorcom.com [193.82.116.20]) by rly-dd04.mx.aol.com (v123.4) with ESMTP id MAILRELAYINDD048-b7649e46cb73da; Tue, 14 Apr 2009 07:00:11 -0400 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1LtgMS-0000Bj-Qh for rs_out_1@blacksheep.org; Tue, 14 Apr 2009 11:59:28 +0100 Received: from [83.244.159.144] (helo=relay3.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1LtgMS-0000Ba-BT for rsgb_lf_group@blacksheep.org; Tue, 14 Apr 2009 11:59:28 +0100 Received: from emls0003.whservidor.com ([200.98.199.37] helo=smtp.cluster002.whservidor.com) by relay3.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1LtgMN-0006Fw-EU for rsgb_lf_group@blacksheep.org; Tue, 14 Apr 2009 11:59:28 +0100 Received: from DuoLaptop (unknown [189.96.45.253]) (Authenticated sender: py2pll@py.qsl.br) by smtp.cluster002.whservidor.com (Postfix) with ESMTPA id 5096118A80F3 for ; Tue, 14 Apr 2009 07:59:02 -0300 (BRT) Received: from 127.0.0.1 (AVG SMTP 8.5.287 [270.11.55/2057]); Tue, 14 Apr 2009 07:58:59 -0300 Message-ID: <79DB14B7D066442EAD1DE7ED48A1EC98@DuoLaptop> From: "Marcus, PY2PLL-PY3CRX" To: References: <532DCAA9F4BA49AEA95330861EC69C5A@gmc.net> In-Reply-To: <532DCAA9F4BA49AEA95330861EC69C5A@gmc.net> Date: Tue, 14 Apr 2009 07:58:47 -0300 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Windows Mail 6.0.6001.18000 X-MimeOLE: Produced By Microsoft MimeOLE V6.0.6001.18049 X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=disabled,HTML_MESSAGE=0.001 Subject: LF: Re: Up-converter 0...550 kHz Content-Type: multipart/mixed; boundary="=======AVGMAIL-49E46C730000=======" X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: * X-Spam-Status: No, hits=1.4 required=5.0 tests=HTML_20_30,HTML_MESSAGE, MIME_MISSING_BOUNDARY,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-IP: 193.82.116.20 --=======AVGMAIL-49E46C730000======= Content-Type: multipart/alternative; boundary="----=_NextPart_000_0086_01C9BCD6.D72B4450" ------=_NextPart_000_0086_01C9BCD6.D72B4450 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Vy interesting ... Hi all, I have made a tunable up-converter for VLF, LF and MF. Nothing ground-brea= king, perhaps, but maybe a little inspiration for some. I have compared the result with a professional receiver RFT EKD300 and my=20= up-converter is better. The lower fq the bigger difference. Here it is: http://ok1fig.nagano.cz/UC5695/Uc5695.htm 73, Petr, OK1FIG On mine "version" the IF is tunable from 10 to 10.5MHz (10MHz TCXO), I use a= pre-mixer instead (MCL ERA6). The mixer core is another MCL unit (SRA1) con= nected in a reverse way (e.g RF input is the DBM IF port which range from DC= to 500MHz). The 500KHz low pass here is eliptic and I compared it with the=20= VLF upconverter from a RFT EKV11. But no images here, my assembly is ... never mind ... :-) 73 Marcus Ramos PY3CRX/PY2PLL S=E3o Bernardo do Campo - SP http://py.qsl.br ------=_NextPart_000_0086_01C9BCD6.D72B4450 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Vy interesting ...
 
Hi all,
 
I have made a tunable up-converter for VL= F, LF=20 and MF. Nothing ground-breaking, perhaps, but maybe a little inspiration f= or=20 some.
I have compared the result with a profess= ional=20 receiver RFT EKD300 and my up-converter is better. The lower fq the=20 bigger difference.
Here it is:
 
73, Petr, OK1FIG

On mine "version" the IF is tunable=20 from 10 to 10.5MHz (10MHz TCXO), I use a pre-mixer instead (MCL ER= A6).=20 The mixer core is another MCL unit (SRA1) connected in a reverse way (e.g=20 RF input is the DBM IF port which range from DC to 500MHz). The 500KHz=20= low=20 pass here is eliptic and I compared it with the VLF upconverter from a RFT=20 EKV11.

But no images here, my assembly is ..= . never=20 mind ... :-)

73

Marcus Ramos
PY3CRX/PY2PLL
S= =E3o=20 Bernardo do Campo - SP
http://py.qsl.br
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