Return-Path: Received: (qmail 2970 invoked from network); 15 Jan 2002 21:11:06 -0000 Received: from unknown (HELO murphys-inbound.services.quay.plus.net) (212.159.14.225) by excalibur-qfe1-smtp-plusnet.harl.plus.net with SMTP; 15 Jan 2002 21:11:06 -0000 Received: (qmail 13196 invoked from network); 15 Jan 2002 21:11:04 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys.services.quay.plus.net with SMTP; 15 Jan 2002 21:11:04 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.33 #2) id 16QakK-0004ZV-00 for rsgb_lf_group-outgoing@blacksheep.org; Tue, 15 Jan 2002 21:03:52 +0000 Received: from fep01.swip.net ([130.244.199.129] helo=fep01-svc.swip.net) by post.thorcom.com with esmtp (Exim 3.33 #2) id 16QakJ-0004ZQ-00 for rsgb_lf_group@blacksheep.org; Tue, 15 Jan 2002 21:03:52 +0000 Received: from oemcomputer ([212.151.9.189]) by fep01-svc.swip.net with SMTP id <20020115210304.HHPB1315.fep01-svc.swip.net@oemcomputer> for ; Tue, 15 Jan 2002 22:03:04 +0100 Message-ID: <002f01c19e08$1636c660$bd0997d4@oemcomputer> From: "Johan Bodin" To: rsgb_lf_group@blacksheep.org References: <3C4301BD.878E49BF@usa.net> <006b01c19d34$ad33d500$979a17d2@steve> <001801c19d4c$78f9d9c0$1700a8c0@home> <3C43FE2C.49EE902A@usa.net> <000401c19db2$0de78220$1700a8c0@home> <3.0.1.16.20020115135933.10e72744@pb623250.kuleuven.be> Subject: LF: Jason TX with G0MRF DDS VFO Date: Tue, 15 Jan 2002 22:02:19 +0100 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2600.0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hello I am planning to add Jason TX capability to the G0MRF DDS VFO. The new program will not fit in the PIC16F84. There is a slight chance that it can be squeezed in if the DFCW option is removed. I will probably write the new program for a PIC16F628 anyway. This chip is pin compatible and has twice as much program memory. The smallest DFCW shift in the current version is 0.25Hz which seems quite wide by todays standards. Is there anybody that actually uses the DFCW function in this VFO? I would like to use pin 3 (RA4) and perhaps also pin 4 (RA5) on the PIC for Jason. Pin 3 is currently connected to the unused FSEL pin on the DDS chip and has a pull-up resistor to +5V. Pin 4 is currently connected directly to +5V. * It would be interesting to know if it is easy to disconnect these pins by cutting the tracks? (I don't have any G0MRF board to look at myself). Life will be easier for me if you can live without DFCW. The already existing DFCW switch can be used for Jason on/off and the DFCW keying input can be used as serial input. Any comments? 73 Johan SM6LKM