Return-Path: X-Spam-DCC: paranoid 1480; Body=2 Fuz1=2 Fuz2=2 X-Spam-Checker-Version: SpamAssassin 3.1.3 (2006-06-01) on lipkowski.org X-Spam-Level: X-Spam-Status: No, score=-1.3 required=5.0 tests=BAYES_00,DNS_FROM_AHBL_RHSBL, HTML_50_60,HTML_MESSAGE,NO_REAL_NAME,SPF_PASS,UNPARSEABLE_RELAY autolearn=no version=3.1.3 Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by paranoid.lipkowski.org (8.13.7/8.13.7) with ESMTP id u7BFd7Cl010915 for ; Thu, 11 Aug 2016 17:39:07 +0200 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1bXs0M-0002Hz-Qr for rs_out_1@blacksheep.org; Thu, 11 Aug 2016 16:34:46 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1bXs0M-0002Hq-A0 for rsgb_lf_group@blacksheep.org; Thu, 11 Aug 2016 16:34:46 +0100 Received: from omr-a009e.mx.aol.com ([204.29.186.49]) by relay1.thorcom.net with esmtps (TLSv1:DHE-RSA-AES256-SHA:256) (Exim 4.87) (envelope-from ) id 1bXs0J-00088t-2t for rsgb_lf_group@blacksheep.org; Thu, 11 Aug 2016 16:34:45 +0100 Received: from mtaomg-mcd01.mx.aol.com (mtaomg-mcd01.mx.aol.com [172.26.223.207]) by omr-a009e.mx.aol.com (Outbound Mail Relay) with ESMTP id 6CE7D3800083 for ; Thu, 11 Aug 2016 11:34:40 -0400 (EDT) Received: from core-mab09f.mail.aol.com (core-mab09.mail.aol.com [172.27.62.9]) by mtaomg-mcd01.mx.aol.com (OMAG/Core Interface) with ESMTP id 7510238000089 for ; Thu, 11 Aug 2016 11:34:39 -0400 (EDT) Received: from 82.153.111.102 by webprd-a71.mail.aol.com (10.72.52.224) with HTTP (WebMailUI); Thu, 11 Aug 2016 11:34:39 -0400 Date: Thu, 11 Aug 2016 11:34:39 -0400 From: gw8glo@aol.co.uk To: rsgb_lf_group@blacksheep.org Message-Id: <1567a3db3c9-3a97-ccf@webprd-a71.mail.aol.com> In-Reply-To: <445EDE9A893D4B8483E060D1E142103B@PCMF> MIME-Version: 1.0 X-MB-Message-Source: WebUI X-MB-Message-Type: User X-Mailer: JAS STD X-Originating-IP: [82.153.111.102] x-aol-global-disposition: G DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=mx.aol.co.uk; s=20150623; t=1470929680; bh=6cJ2jhvfNhhoDGYAJjFyD8ELjX6mVHMGCbtMFCDIjnQ=; h=From:To:Subject:Message-Id:Date:MIME-Version:Content-Type; b=qfndyJike62N8gEyJxozdVX+93uK/oK2UXNc0A6Rpj2nodmhCf6If0iRHC7spM9rV xR3rUECrEIg7oMed1vB4atmDI3qIeFlvzKJHodR5KrWDL7bzdujI2nVR+2WsN7zYpO NI24ujCPdfqt+rIVzveqFKiUQBwuNTD8vod4q7dg= x-aol-sid: 3039ac1adfcf57ac9b0f492d X-Scan-Signature: b99b9f5ebb2905dfac0746d3f825052c Subject: Re: LF: teflon capacitors Content-Type: multipart/alternative; boundary="----=_Part_4182_919880662.1470929679302" 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 2.56 on 10.1.3.11 Status: O X-Status: X-Keywords: X-UID: 8550 ------=_Part_4182_919880662.1470929679302 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit OK Andy they are the normal doorknob types, the ones I am looking at are made of a white ceramic case and are nitrogen filled with bolts at either end. There are 2 types available in 2000pf 2kv and 16kv. They are about 100mm long. They are available via ebay. 73 Dave -----Original Message----- From: F6CNI - Andy - JN19QB To: rsgb_lf_group Sent: Thu, 11 Aug 2016 11:06 Subject: LF: teflon capacitors Hello Dave, for info : I did not tried the teflon models, but in the years 2002 I had an home made ampli on 2200m band, with 2 x 3-500Z tubes, also 800 W output. I used Russian doorknob capacitors types K15U-2 and KVI-3 without any problem. They are still avaible on the UR4LL surplus parts site http://www.ur4ll.net/ Andy. From: gw8glo@aol.co.uk Sent: Thursday, August 11, 2016 9:39 AM To: rsgb_lf_group@blacksheep.org Subject: LF: teflon capacitors Has anybody tried using the Russian teflon doorknob capacitors for tuned circuits on 137 khz? I have seen some rated at 2000pf at 16kv which will give me the 8000pf I require to tune the loop. So far most caps get hot or self destruct when getting to 1kw, only 2/3 power. Current at 800 w is about 20 amps. Thanks Dave ------=_Part_4182_919880662.1470929679302 Content-Type: text/html; charset=utf-8 Content-Transfer-Encoding: 7bit OK Andy they are the normal doorknob types, the ones I am looking at are made of a white ceramic case and are nitrogen filled with bolts at either end. There are 2 types available in 2000pf 2kv and 16kv. They are about 100mm long. They are available via ebay.
73 Dave



-----Original Message-----
From: F6CNI - Andy - JN19QB <f6cni@orange.fr>
To: rsgb_lf_group <rsgb_lf_group@blacksheep.org>
Sent: Thu, 11 Aug 2016 11:06
Subject: LF: teflon capacitors

Hello Dave, for info :
 
I did not tried the teflon models, but in the years 2002 I had an home made ampli on 2200m band, with 2 x 3-500Z tubes, also 800 W output.
 
I used Russian doorknob capacitors types K15U-2 and KVI-3 without any problem. They are still avaible on the UR4LL surplus parts site http://www.ur4ll.net/
 
Andy.
 
Sent: Thursday, August 11, 2016 9:39 AM
Subject: LF: teflon capacitors
 
Has anybody tried using the Russian teflon doorknob capacitors for tuned circuits on 137 khz? I have seen some rated at 2000pf at 16kv which will give me the 8000pf I require to tune the loop. So far most caps get hot or self destruct when getting to 1kw, only 2/3 power. Current at 800 w is about 20 amps. Thanks Dave
 ------=_Part_4182_919880662.1470929679302--