Return-Path: Received: (qmail 10064 invoked from network); 18 Dec 2001 13:09:46 -0000 Received: from unknown (HELO warrior.services.quay.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 18 Dec 2001 13:09:46 -0000 Content-Transfer-Encoding: 8bit Received: (qmail 16643 invoked from network); 18 Dec 2001 12:53:06 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior.services.quay.plus.net with SMTP; 18 Dec 2001 12:53:06 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.33 #2) id 16GJdm-0001BM-00 for rsgb_lf_group-outgoing@blacksheep.org; Tue, 18 Dec 2001 12:46:38 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from bob.dera.gov.uk ([192.5.29.90]) by post.thorcom.com with esmtp (Exim 3.33 #2) id 16GJdl-0001BH-00 for rsgb_lf_group@blacksheep.org; Tue, 18 Dec 2001 12:46:37 +0000 Received: by bob.dera.gov.uk; (8.8.8/1.3/10May95) id MAA08751; Tue, 18 Dec 2001 12:54:57 GMT Received: (qmail 13011 invoked from network); 18 Dec 2001 13:35:58 -0000 Received: from gauntlet.mail.dstl.gov.uk (192.168.9.10) by baton.dstl.gov.uk with SMTP; 18 Dec 2001 13:35:58 -0000 Received: by gauntlet.mail.dstl.gov.uk; id NAA28547; Tue, 18 Dec 2001 13:07:49 GMT Received: from unknown(172.17.128.171) by gauntlet.mail.dstl.gov.uk via smap (3.2) id xma028522; Tue, 18 Dec 01 13:07:25 GMT Received: from FRN-MAIL-R3.dstl.gov.uk (unverified) by mailguard.dstl.gov.uk (Content Technologies SMTPRS 4.1.5) with ESMTP id for ; Tue, 18 Dec 2001 12:50:52 +0000 Received: by frn-mail-r3.dstl.gov.uk with Internet Mail Service (5.5.2650.21) id ; Tue, 18 Dec 2001 12:45:29 -0000 Message-ID: <7D653C9C42F5D411A27C00508BF8803D55C669@pdw-mail-r1.dstl.gov.uk> From: "Talbot Andrew" To: rsgb_lf_group@blacksheep.org Subject: LF: RE: Re: long haul QSO's Date: Tue, 18 Dec 2001 12:45:22 -0000 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.5.2650.21) Content-Type: text/plain; charset=iso-8859-1; format=flowed Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: The parallel port would enable simple hardware to allow a crude D/A converter for driving a VCXO, but isn't the LPT port difficult to drive under Windoze programming ? The COM port is much easier and I suggest you do both to enable someone to use a UART or shift register for times when the LPT is not available. What coding are you going to use - ie. the code table and timings, - then I can write something for driving my DDS board. Andy G4JNT -----Original Message----- From: Alberto di Bene [mailto:dibene@usa.net] Sent: 18 December 2001 11:42 To: rsgb_lf_group@blacksheep.org Subject: LF: Re: long haul QSO's James Moritz wrote: > -Simple TX hardware; The 7 tone multi-FSK signal could be generated using a > VCXO circuit keyed by an extremely simple interface from an 8 bit printer > port; for example, an extension of G3AQC's DFCW generator. > [...] Hello James and the group, what you all think about the best method of generating multiple, sequential frequencies from an LF transmitter? The parallel port method, just suggested by Jim Moritz, or a sine signal generated by the sound card ? Or maybe another, simpler, method ? Just asking, as you all have much greater experience than I have on putting together an LF TX. Thanks for any reply. 73 Alberto I2PHD P.S. Which is more correct in English : "thanks for any reply" or "thanks for any replies" ?? The two forms seem to be both used... -- The Information contained in this E-Mail and any subsequent correspondence is private and is intended solely for the intended recipient(s). For those other than the recipient any disclosure, copying, distribution, or any action taken or omitted to be taken in reliance on such information is prohibited and may be unlawful.