Return-Path: Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by klubnl.pl (8.14.4/8.14.4/Debian-8+deb8u2) with ESMTP id w95KOiVs022954 for ; Fri, 5 Oct 2018 22:24:45 +0200 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1g8WYs-0005l0-Ao for rs_out_1@blacksheep.org; Fri, 05 Oct 2018 21:18:58 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1g8WYm-0005kr-I8 for rsgb_lf_group@blacksheep.org; Fri, 05 Oct 2018 21:18:52 +0100 Received: from mail-oi1-x22d.google.com ([2607:f8b0:4864:20::22d]) by relay1.thorcom.net with esmtps (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.91_59-0488984) (envelope-from ) id 1g8WYj-0000wN-Go for rsgb_lf_group@blacksheep.org; Fri, 05 Oct 2018 21:18:51 +0100 Received: by mail-oi1-x22d.google.com with SMTP id e17-v6so11385890oig.12 for ; Fri, 05 Oct 2018 13:18:48 -0700 (PDT) X-DKIM-Result: Domain=gmail.com Result=Good and Known Domain DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:in-reply-to:references:from:date:message-id:subject:to :content-transfer-encoding; bh=wFs/H5ipcKB5yZlCrRiZdSIAdnzm+WencereoTwyekY=; b=u6/Dugv3B199XhkAy6cDCP+NcATFbd467RJZwAmzwEhaf3R992xDcZUi+I07+b7emp yXXMcA671bcBHkOFt7ood8xvCBNxyPMJEcVt7JIH5RfLwtaWJJOehT38MnQbnZSRJR1Z A/MVWUQ9OxTIrDUIHVEh+I8OTAa0Mjy1JBph/aaNec1/NbM6jfhPqYUMHaddkxIdqRiR zQ5a6RrD8M6WEgDqK27DfpsXgWTZiAzywpux7FzHILlCNldIwZ4/MS4+WJCZYyTBvrX7 0aWslYmPiYepe6oJDOAJqGmCLJX3iyMutnvC6raIClIydLYvZn6JJzLD3VnHzsOnHZfd ixlA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:in-reply-to:references:from:date :message-id:subject:to:content-transfer-encoding; bh=wFs/H5ipcKB5yZlCrRiZdSIAdnzm+WencereoTwyekY=; b=SewYRF4koMuf9vcn+Z00OxfHa7NDS9OiPfSjIbTePROf+ekMgyxHm/vzC6f7Sk9k/V HkRWf6gZGdbl7zv61AQC4URO9QKCIgfBwS9XgeD9u7TrlnhQpqKowl2Lzgg06zHruHPb OXFSNrUr5l4rV6/K+LK0HUVPCrZm/3OOoRRtCBPfMRuadqX1PUv8pgy5bDXJKJN2vWQR U+8NzgpNkqVx95byAvRAf9soYve8WkX7y5kpUE8TjoaBktAp/LR2yLL76EzK8Llz0gyN /U4FskbmwMXReOl+1y6qzLJKh0L7CyXiZBgnHIHmPbsSj6ZZz8GO7mFf+F/f60mULdU4 vjug== X-Gm-Message-State: ABuFfoihDPsV9iqd6KpAZ/RBco7/GuJn63lllQia8FdXOZIzwuF2GUVY KpK9e9Z32ZAn65dO71a3SwmpR8Kyaun4WwI+6XIzXw== X-Google-Smtp-Source: ACcGV62W4tFOPxp3NDo06AhxjeIeTae6YQF2Mt8eeMdaQIbiUrifN+gphxWZ9Fjo++EMluhMMgg7jXu4b1EYNlfu8BQ= X-Received: by 2002:aca:e7d0:: with SMTP id e199-v6mr267696oih.187.1538770727146; Fri, 05 Oct 2018 13:18:47 -0700 (PDT) MIME-Version: 1.0 Received: by 2002:ac9:6695:0:0:0:0:0 with HTTP; Fri, 5 Oct 2018 13:18:46 -0700 (PDT) In-Reply-To: <000f01d45ce5$7b06b3d0$71141b70$@fr> References: <0D5B03A4C97D4984B5A71E9D02DB7696@BasementHP> <1538765237732.94198@kuleuven.be> <000f01d45ce5$7b06b3d0$71141b70$@fr> From: John Langridge Date: Fri, 5 Oct 2018 15:18:46 -0500 Message-ID: To: rsgb_lf_group@blacksheep.org X-Spam-Score: 0.0 (/) X-Spam-Report: Spam detection software, running on the system "relay1.thorcom.net", has NOT identified this incoming email as spam. The original message has been attached to this so you can view it or label similar future email. If you have any questions, see @@CONTACT_ADDRESS@@ for details. Content preview: > Hello Rik , I don’t know the IC-718 but my IC-735 was modified for MF band > with 45W out. I guess the question is whether the IC-735 mod Nicolas refers to is the MARS/CAP mod or the Jacek mod (http://alain.st.free.fr/site1/aspicsite/IC-735/500KHZ/735-630m-mod.pdf), the latter being reported to be pretty good. Of course this does not address the IC 718 question but I suspect the MARS and CAP mod is what is being described... [...] Content analysis details: (0.0 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at http://www.dnswl.org/, no trust [2607:f8b0:4864:20:0:0:0:22d listed in] [list.dnswl.org] 0.0 FREEMAIL_FROM Sender email is commonly abused enduser mail provider (kb5njd[at]gmail.com) -0.0 SPF_PASS SPF: sender matches SPF record 0.0 T_DKIM_INVALID DKIM-Signature header exists but is not valid X-Scan-Signature: 739d4fb39bd02fc5a2de5437a39bb056 Subject: Re: LF: RE: FW: Icom Transceiver Question Content-Type: text/plain; charset="UTF-8" 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=none 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 Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from quoted-printable to 8bit by klubnl.pl id w95KOiVs022954 > Hello Rik , I don’t know the IC-718 but my IC-735 was modified for MF band > with 45W out. I guess the question is whether the IC-735 mod Nicolas refers to is the MARS/CAP mod or the Jacek mod (http://alain.st.free.fr/site1/aspicsite/IC-735/500KHZ/735-630m-mod.pdf), the latter being reported to be pretty good. Of course this does not address the IC 718 question but I suspect the MARS and CAP mod is what is being described... The problem with the MARS and CAP mod is many don't realize or understand that the power being generated on 137 and 472 is harmonic- rich and requires an outboard LPF and some other means of amplification. The outboard LPF is a new concept for some since that functionality is being handled inside the transceiver for HF... I've seen some report 40-50 watts of power output on 472, which is harmonic-rich, from a modified transceiver, believing that all of it is on 472. Sometimes they can be convinced to use an external filter which lowers the power considerably. I heard of one guy that didn't like the fact that the filter "lowered" his power output at the desired frequency so he removed it which, of course, is very problematic, but it was the filter doing it's job. Antenna matching networks alone are typically very substandard and under-performing when it comes to filtering functions... It's probably not a good idea to do the MARS and CAP mods for 137 or 472. I don't know for certain, but for a 718, that's probably the only option (assuming it is an option anymore) without considerable effort (like the Jacek mod). 73! John