Return-Path: Received: (qmail 7842 invoked from network); 17 Feb 2002 21:54:17 -0000 Received: from unknown (HELO murphys-inbound.services.quay.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 17 Feb 2002 21:54:17 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: (qmail 1094 invoked from network); 17 Feb 2002 21:54:15 -0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys.services.quay.plus.net with SMTP; 17 Feb 2002 21:54:15 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.33 #2) id 16caja-0000pH-00 for rsgb_lf_group-outgoing@blacksheep.org; Sun, 17 Feb 2002 23:28:42 +0000 Received: from imo-d09.mx.aol.com ([205.188.157.41]) by post.thorcom.com with esmtp (Exim 3.33 #2) id 16cajX-0000oR-00 for rsgb_lf_group@blacksheep.org; Sun, 17 Feb 2002 23:28:40 +0000 Received: from DL4YHF@aol.com by imo-d09.mx.aol.com (mail_out_v32.5.) id l.97.233e366f (4258) for ; Sun, 17 Feb 2002 16:49:56 -0500 (EST) From: DL4YHF@aol.com Message-ID: <97.233e366f.29a17f84@aol.com> Date: Sun, 17 Feb 2002 16:49:56 EST Subject: LF: M0BMU test transmission on sunday evening. To: rsgb_lf_group@blacksheep.org MIME-Version: 1.0 Content-Type: text/html; charset=windows-1252 X-Mailer: AOL 6.0 for Windows XP DE sub 50 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Content-transfer-encoding: 8bit Hello Jim and group,

Fine copy on Jim's PSK08 transmission at 137.500 through the local 50Hz QRM (received with an indoor ferrite antenna and a TS850, the signal was not audible but decodable).

Unfortunately I could not join the fun, but observing the QSO between Markus DF6NM and M0BMU was rewarding. Hope there will be some more reports for you.

One observation: The "squelch-killing" postamble tone used in PSK31 seemed to be missing in Jim's over, in contrast to DF6NM's transmission.
(PSK08 is based on the PSK31 implementation by AE4JY in WinPSK, which itself is based on the brilliant work by G3PLX).
The decoder clears the accumulated squelch voltage when it detects the postable tone, avoiding garbage on the screen when the squelch slowly falls after a 'strong' signal.

Thanks for the demonstration !

Regards,
 Wolf DL4YHF.