Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on lipkowski.org X-Spam-Level: X-Spam-Status: No, score=-2.3 required=5.0 tests=FREEMAIL_FORGED_FROMDOMAIN, FREEMAIL_FROM,HEADER_FROM_DIFFERENT_DOMAINS,RCVD_IN_DNSWL_MED,SPF_PASS, T_DKIM_INVALID autolearn=ham autolearn_force=no version=3.4.0 X-Spam-DCC: EATSERVER: mailn 1166; Body=2 Fuz1=2 Fuz2=2 Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by lipkowski.org (8.14.4/8.14.4/Debian-8+deb8u1) with ESMTP id v5QAjEuW005935 for ; Mon, 26 Jun 2017 12:45:15 +0200 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1dPROv-0004Ov-Aq for rs_out_1@blacksheep.org; Mon, 26 Jun 2017 11:37:49 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1dPROu-0004Om-SY for rsgb_lf_group@blacksheep.org; Mon, 26 Jun 2017 11:37:48 +0100 Received: from mail-wr0-x230.google.com ([2a00:1450:400c:c0c::230]) by relay1.thorcom.net with esmtps (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.89) (envelope-from ) id 1dPROs-0000B4-38 for rsgb_lf_group@blacksheep.org; Mon, 26 Jun 2017 11:37:47 +0100 Received: by mail-wr0-x230.google.com with SMTP id k67so141828667wrc.2 for ; Mon, 26 Jun 2017 03:37:45 -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=date:from:message-id:to:subject:in-reply-to:references:mime-version :content-transfer-encoding; bh=VkhlEsiIkfSJDgcOBoS511AKcXjmhfPDE+ooZGbStAU=; b=jk4gYXSdCSu1zJVlOo22eLzk3Kdz8LcQhEQzGXANt6GLfm/k8hqGPD/cmetFCvFD4E tNszhNd6Up6dTexW8wKf6eTyNQ0ORjztpZLrW39FmefeZ/h65NZMxKkJTCKw7nfA2WKE 7VHcCHt30FInTW4o/3Ex8gr9R6ugqN8B4c4s/cDFvOiy1h4jGEy8DJrjTCmm0nicb7wc nU/RIumBV0pmtu19+6eXcPGYsOABdJifpMQn2v90tVJbYsiktccPLtnLM5iUtvsnIecF MJlX7vv0s0dakczWEdOFu2p5RYC7sEfjEMQgO5uXjyMWAvyhrd8awZ1v66woM7uX7c3E xB5A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:message-id:to:subject:in-reply-to :references:mime-version:content-transfer-encoding; bh=VkhlEsiIkfSJDgcOBoS511AKcXjmhfPDE+ooZGbStAU=; b=udoyC7qghm04Mb7H3R5xh0a1e/wkdw63KtNVrwUaxw+svSDtm+Dm8hVc1xkqV1CtlR 73ecR2u2xIJpUq0uWmYglO1hxuJW2WsrBTy1T1hvIE8lh8CEbPqBU5hmO+1mLfBKKnaj gmnRy5BORqsrFgofMQ/0WpZM4QUwemVkynqfs/FU9eklHdzvobAjzsAER84TUDA8+A89 Hr7iu7b3/G1hrK6f8iwfz8ptw72vjMDZwIUeB6DcE7x2cPJP14gy+BbiK6L4cN1f8jNr ETAXkorOrMqwwMaZsVQkpc+9S/jPKY6iLzl6HvMSrVZ5NKMXe3UkTo8bGEDVqqgL1vNI lX6Q== X-Gm-Message-State: AKS2vOzLfxKv48whjEfDrNFRcMApEAyjtDl0Pj3zKStoetIrP2l7vI0R ZW2/zi7Vuaz6XMLZ X-Received: by 10.223.171.181 with SMTP id s50mr3324955wrc.129.1498473465070; Mon, 26 Jun 2017 03:37:45 -0700 (PDT) Received: from OfficeWin7.lan (82-70-254-222.dsl.in-addr.zen.co.uk. [82.70.254.222]) by smtp.gmail.com with ESMTPSA id o6sm7946756wrc.48.2017.06.26.03.37.44 for (version=TLS1 cipher=AES128-SHA bits=128/128); Mon, 26 Jun 2017 03:37:44 -0700 (PDT) Date: Mon, 26 Jun 2017 11:37:43 +0100 From: Chris Wilson X-Priority: 3 (Normal) Message-ID: <1284873086.20170626113743@gmail.com> To: Mike Dennison In-Reply-To: <594FCAFD.28958.1E2184@mike.dennison.ntlworld.com> References: <1649946984.20170624173724@gmail.com> <594FCAFD.28958.1E2184@mike.dennison.ntlworld.com> MIME-Version: 1.0 X-Scan-Signature: f62c7cf8eeb8e5a327b71719e9bffff1 Subject: Re: LF: Insulating a Versatower from ground Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit 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-Scanned-By: MIMEDefang 2.75 Status: O X-Status: X-Keywords: X-UID: 12112 Hello Mike, Would using the tower as the radiator itself be any more efficient than a slightly lower vertical that is supported from a guy from the top of the tower though? I am beginning to think that insulating it would be pretty time consuming and at risk of not working, especially as you say, in wet weather, plus a live tower with dogs about is probably an unacceptable risk here.... Thanks for the insight. Sunday, June 25, 2017, 3:38:53 PM, you wrote: > Nice idea, Chris, but any insulation would have to withstand the > thousands of volts on your antenna in all conditions (wet and dry). > Might work for the lower volages on higher bands but I doubt it would > be OK at LF. The other factor worth bearing in mind is the max > permitted ERP which you must be close to already judging from the > reports you are getting. > Mike, G3XDV -- Best regards, Chris mailto:dead.fets@gmail.com