Envelope-to: dave@picks.force9.co.uk Delivery-date: Sun, 08 Jan 2006 19:09:09 +0000 Received: by ptb-mxcore02.plus.net with spam-scanned (PlusNet MXCore v2.00) id 1Evfud-00029o-C2 for dave@picks.force9.co.uk; Sun, 08 Jan 2006 19:09:09 +0000 Received: from post.thorcom.com ([193.82.116.20]) by ptb-mxcore02.plus.net with esmtp (PlusNet MXCore v2.00) id 1Evfud-00028i-8R for dave@picks.force9.co.uk; Sun, 08 Jan 2006 19:09:07 +0000 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1EvfuW-0004Pl-Dc for rs_out_1@blacksheep.org; Sun, 08 Jan 2006 19:09:00 +0000 Received: from [193.82.59.130] (helo=relay2.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1EvfuW-0004Pc-0q for rsgb_lf_group@blacksheep.org; Sun, 08 Jan 2006 19:09:00 +0000 Received: from imo-d22.mx.aol.com ([205.188.144.208]) by relay2.thorcom.net with esmtp (Exim 4.51) id 1EvgQh-0007DQ-Gi for rsgb_lf_group@blacksheep.org; Sun, 08 Jan 2006 19:42:18 +0000 Received: from MarkusVester@aol.com by imo-d22.mx.aol.com (mail_out_v38_r6.3.) id l.65.53aac3d2 (48552) for ; Sun, 8 Jan 2006 14:08:45 -0500 (EST) From: MarkusVester@aol.com Message-ID: <65.53aac3d2.30f2bd3c@aol.com> Date: Sun, 8 Jan 2006 14:08:44 EST To: rsgb_lf_group@blacksheep.org MIME-Version: 1.0 X-Mailer: 8.0 for Windows sub 6104 Subject: LF: Another PSK Modulator Content-Type: text/html; charset=windows-1252 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-PN-SpamFiltered: by PlusNet MXCore (v2.00) Content-transfer-encoding: 8bit Dear LF Group,

anyone in need of a simple, clean and stable PSK modulator, driven by any old DOS PC without a soundcard? Look at

http://members.aol.com/df6nm2/SerPSK.zip (141kB)

for a description and a software (including Basic source) which sends dithered bit patterns to the RS232 data line, feeding a balanced modulator and linear PA through a crude R-C lowpass. This solution has worked successfully at the DI2AG beacon for some time last year.

Happy experimenting

Markus, DF6NM