Return-Path: Received: from mtain-dl03.r1000.mx.aol.com (mtain-dl03.r1000.mx.aol.com [172.29.74.209]) by air-ma03.mail.aol.com (v129.10) with ESMTP id MAILINMA031-b4f74dd56802330; Thu, 19 May 2011 14:57:06 -0400 Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-dl03.r1000.mx.aol.com (Internet Inbound) with ESMTP id 14579380000AB; Thu, 19 May 2011 14:57:01 -0400 (EDT) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1QN8ON-0005pk-8t for rs_out_1@blacksheep.org; Thu, 19 May 2011 19:56:15 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1QN8OM-0005pb-NB for rsgb_lf_group@blacksheep.org; Thu, 19 May 2011 19:56:14 +0100 Received: from mail-iy0-f171.google.com ([209.85.210.171]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1QN8OK-0007h3-5b for rsgb_lf_group@blacksheep.org; Thu, 19 May 2011 19:56:14 +0100 Received: by iyi20 with SMTP id 20so3667104iyi.16 for ; Thu, 19 May 2011 11:56:05 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:in-reply-to:references:date :message-id:subject:from:to:content-type; bh=LR5mszq4a5U/OsNk+2kGFgwMa8CoCIrHQYTmVAvTLYE=; b=MYQ59tT0WnbC/ycZHUm6lIcssODttlYaW4d6t6CAs1cU6/x39CCVLRZ8passwRAV7Z D0FxklluqwwbgL+FwLH/tdN1pSOYC6SxpUm9ievLGQwEafx/+YJo8KeEVESILbD9rl8g I8tB16V/9TO5sGLB5Mh/uW46y3yJ/PcJhc2ZY= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :content-type; b=aXpiJNIvesaYckpFxWgxr6QregR4L61+B+3LHsR3OZjVixL+s5SsR7k0eOZrSgnozq 33T/7eHo3KWdRyCTOWPLkG1Mh+QoSqeybhciSjXHnSAgKGgEDvwvBljRExx+wKxeRpyA PWf/VtxV4EHVCe1OGuk+HqaUcvpzlF5bzKE6k= MIME-Version: 1.0 Received: by 10.231.188.140 with SMTP id da12mr2564996ibb.131.1305831365153; Thu, 19 May 2011 11:56:05 -0700 (PDT) Received: by 10.231.208.15 with HTTP; Thu, 19 May 2011 11:56:05 -0700 (PDT) In-Reply-To: <4DD55989.1050002@iup.uni-heidelberg.de> References: <42362_9A0TCP@hamradio> <4DD55989.1050002@iup.uni-heidelberg.de> Date: Thu, 19 May 2011 19:56:05 +0100 Message-ID: From: Andy Talbot To: rsgb_lf_group@blacksheep.org DomainKey-Status: good (testing) X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=disabled,HTML_MESSAGE=0.001 Subject: Re: LF: RE: FCW keyer... Content-Type: multipart/alternative; boundary=001636c925f2a81b2304a3a58e96 X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.0 required=5.0 tests=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: mail_rly_antispam_dkim-d288.2 ; domain : gmail.com DKIM : pass x-aol-sid: 3039ac1d4ad14dd567fd37d3 X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : none X-Mailer: Unknown (No Version) --001636c925f2a81b2304a3a58e96 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Here's some PIC code for generating DFCW I originally wrote for the GB3SCX and GB3SCC microwave beacons. http://www.g4jnt.com/dfcwbcn2.zip There are two .ASM files in there, one uses the obsolete 16F84, and ver 2 is adapted for the 16F627 (also the 62= 8 probably) with a few interface connections swapped around It is based on my standard beacon keyer http://www.g4jnt.com/BcnKeyer.htm and lets you change message parameters using an RS232 interface rather than having to get out the PIC programmer to change teh stored message. All the details are in the .ASM file, and circuit etc is similr to the standar= d keyer module. Andy G4JNT 2011/5/19 Stefan Sch=E4fer > Hello Szigy, LF, > > Sorry for my delaied answer. I will further answer in a personal mail. > > About DFCW: Yes, the first you may use is Rik's QRS program (which i am > using too at the moment). With the two 12 V (up to about 10 mA) levels= from > the RS232 you can directly steer a NPN transistor or a FET or an optocou= pler > to push the PTT. The other one is needed for DFCW. > Realising the small frequency shift can be done in several ways of cours= e. > It depends on your type of VFO. You told me to have a XTAL VFO. So what= you > can do is just to pull the XTAL a bit. In my first DFCW generator i did= it > with a simple NPN transistor (BC548C, just cause it was available) that > switches a small C against ground. C is some pF, adjustable to set a pro= per > shift. You can use varicap diodes alternatively but actually it doesn't > matter. > > > 73, Stefan/DK7FC > > Am 19.05.2011 09:50, schrieb Rik Strobbe: > >> Szigy, >> >> I can offer you a software solution: >> >> http://www.qsl.net/on7yd/zip/qrs408.zip >> >> 73, Rik ON7YD - OR7T >> >> ________________________________________ >> Van: owner-rsgb_lf_group@blacksheep.org [ >> owner-rsgb_lf_group@blacksheep.org] namens Szigy [yo2is@9a0tcp.ampr.org= ] >> Verzonden: donderdag 19 mei 2011 9:39 >> Aan: rsgb_lf_group@blacksheep.org >> Onderwerp: LF: FCW keyer... >> >> rom: YO2IS >> Some days ago had a nice random QSO with DK7FC on 137.7 KHz. >> We started in QRSS then he come back with a loong DFCW message. >> Unfortunately had no DFCW keyer capability. >> Have built several PIC (16F84) keyers including the SM6LKM beacon >> keyer modified by me for QRSS, but none has the DFCW option. >> Being a H.M. fan am looking for some afordable ideas. >> 73& DX !, Szigy >> >> > > --001636c925f2a81b2304a3a58e96 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable
Here's some PIC code for generating DFCW I originally wrote for= the GB3SCX and GB3SCC microwave beacons.
http://www.g4jnt.com/df= cwbcn2.zip=A0=A0 There are two .ASM files in there, one uses the obsol= ete 16F84, and ver 2 is adapted for the 16F627=A0 (also the 628 probably)= with a few interface connections swapped around
=A0
It is based on my standard beacon keyer=A0=A0http://www.g4jnt.com/BcnKeyer.htm =A0and lets yo= u change message parameters using an RS232 interface rather than having to= get out the PIC programmer to change teh stored message.=A0=A0=A0 All the= details are in the .ASM file, and circuit etc is similr to the standard= keyer module.
=A0
=A0
=A0
Andy
G4JNT
=A0


=A0
2011/5/19 Stefan Sch=E4fer &l= t;schaefer@iup.uni-heide= lberg.de>
Hello Szigy, LF,

Sorry= for my delaied answer. I will further answer in a personal mail.

A= bout DFCW: Yes, the first you may use is Rik's QRS program (which i am= using too at the moment). With the two 12 V (up to about 10 mA) levels fr= om the RS232 you can directly steer a NPN transistor or a FET or an optoco= upler to push the PTT. The other one is needed for DFCW.
Realising the small frequency shift can be done in several ways of course.= It depends on your type of VFO. You told me to have a XTAL VFO. So what= you can do is just to pull the XTAL a bit. In my first DFCW generator i= did it with a simple NPN transistor (BC548C, just cause it was available)= that switches a small C against ground. C is some pF, adjustable to set= a proper shift. You can use varicap diodes alternatively but actually it= doesn't matter.


73, Stefan/DK7FC

Am 19.05.2011 09:50, schrieb Rik Strobbe:<= br>
Szigy,

I can offer you= a software solution:

http://www.qsl.net/on7yd/zip/qrs408.zip

73, Rik =A0ON7YD - OR7T

_______________________________________= _
Van: owner-rsgb_lf_group@blacksheep.org [owner-rsgb_lf_group@blackshe= ep.org] namens Szigy [yo2is@9a0tcp.ampr.org]
Verzonden: donderdag 19 mei 2011 9:39
Aan: rsgb_lf_group@blacksheep.org
= Onderwerp: LF: FCW keyer...

rom: YO2IS
=A0 Some days ago had a= nice random QSO with DK7FC on 137.7 KHz.
=A0We started in QRSS then he come back with a loong DFCW message.
=A0U= nfortunately had no DFCW keyer capability.
=A0Have built several PIC (1= 6F84) keyers including the SM6LKM beacon
keyer modified by me for QRSS,= but none has the DFCW option.
=A0Being a H.M. fan am looking for some afordable ideas.
=A0 =A0 73&= ; =A0DX !, Szigy
=A0


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