Return-Path: X-Spam-DCC: paranoid 1170; 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=2.2 required=5.0 tests=BAYES_00,DNS_FROM_AHBL_RHSBL, FORGED_MUA_OUTLOOK,HTML_40_50,HTML_MESSAGE 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 t9OMp5Lk016154 for ; Sun, 25 Oct 2015 00:51:05 +0200 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1Zq7b8-0008Ma-9v for rs_out_1@blacksheep.org; Sat, 24 Oct 2015 23:47:38 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1Zq7b7-0008MR-UL for rsgb_lf_group@blacksheep.org; Sat, 24 Oct 2015 23:47:37 +0100 Received: from rgout0306.bt.lon5.cpcloud.co.uk ([65.20.0.212]) by relay1.thorcom.net with esmtp (Exim 4.86) (envelope-from ) id 1Zq7a3-00066X-L8 for rsgb_lf_group@blacksheep.org; Sat, 24 Oct 2015 23:47:36 +0100 X-OWM-Source-IP: 86.149.134.195 (GB) X-OWM-Env-Sender: alan.melia@btinternet.com X-CTCH-RefID: str=0001.0A010203.562C0A35.0015,ss=1,re=0.000,recu=0.000,reip=0.000,cl=1,cld=1,fgs=0 X-Junkmail-Premium-Raw: score=38/50,refid=2.7.2:2015.10.14.50616:17:38.343,ip=86.149.134.195,rules=__HAS_MSGID, __SANE_MSGID, MSGID_32HEX_LC, INVALID_MSGID_NO_FQDN, __MSGID_32HEX, __HAS_FROM, __PHISH_FROM2, __FRAUD_WEBMAIL_FROM, __TO_MALFORMED_2, __TO_NO_NAME, __BOUNCE_CHALLENGE_SUBJ, __BOUNCE_NDR_SUBJ_EXEMPT, __SUBJ_ALPHA_END, __MIME_VERSION, __CT, __CTYPE_MULTIPART_ALT, __CTYPE_HAS_BOUNDARY, __CTYPE_MULTIPART, __HAS_X_PRIORITY, __HAS_MSMAIL_PRI, __HAS_X_MAILER, USER_AGENT_OE, __OUTLOOK_MUA_1, __USER_AGENT_MS_GENERIC, __ANY_URI, LINK_TO_IMAGE, __FRAUD_BODY_WEBMAIL, __URI_NO_WWW, __CP_MEDIA_BODY, __CP_URI_IN_BODY, __SUBJ_ALPHA_NEGATE, SUPERLONG_LINE, __URI_IN_BODY, __HTML_AHREF_TAG, __HAS_HTML, BODYTEXTH_SIZE_10000_LESS, __MIME_HTML, __TAG_EXISTS_HTML, __STYLE_RATWARE_NEG, RDNS_GENERIC_POOLED, __URI_NS, SXL_IP_DYNAMIC[195.134.149.86.fur], RDNS_SUSP_GENERIC, __PHISH_FROM, __OUTLOOK_MUA, RDNS_SUSP, __FRAUD_WEBMAIL, FORGED_MUA_OUTLOOK, NO_URI_HTTPS X-CTCH-Spam: Unknown Received: from gnat (86.149.134.195) by rgout03.bt.lon5.cpcloud.co.uk (8.6.122.06) (authenticated as alan.melia@btinternet.com) id 561CA201015FD7D4 for rsgb_lf_group@blacksheep.org; Sat, 24 Oct 2015 23:46:12 +0100 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=btinternet.com; s=btcpcloud; t=1445726791; bh=gD88M4llU9uVlN/IzvJstNNpoIF6iCO4n0aZF/Dgf3s=; h=Message-ID:From:To:References:Subject:Date:MIME-Version:X-Mailer; b=YRz9GkmGlpidWW+Aq/t/tPMuAzsmsjWgsakMQF6a3UAYgw75LvK4oJpZy/3bVDwACCgFXgNfsAC+HYewxDs+k/+D2ySjcRZaqQpvV0CF9gVO87r6c6naHA7jAYdanTxyRhRwHLGX74mctk0unTBuYzPIzOAfhBJvwVNyLlQzhU8= Message-ID: From: "Alan Melia" To: References: ,<8D2DCB586344FC2-FD8-744AA8@webmail-vd011.sysops.aol.com>,<15F6C5D23D6C469B9FE6E3C21C6ABBD7@gnat> Date: Sat, 24 Oct 2015 23:46:06 +0100 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.5931 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.6157 X-Scan-Signature: f6bad70c4aa77b0bf5528aff34072d8d Subject: Re: LF: XPQ WSPR15 475/136 and warm ceramic feed thrus Content-Type: multipart/alternative; boundary="----=_NextPart_000_0120_01D10EB6.267C1D80" 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 10.1.3.10 Status: O X-Status: X-Keywords: X-UID: 4635 This is a multi-part message in MIME format. ------=_NextPart_000_0120_01D10EB6.267C1D80 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Hi Laurence my book gives Stainless Steel as 8 times resistivity of = Brass and 40 times that of pure copper so maybe you were pushing your = luck a bit, though I would have thought the connections at the ends = would be problem. It looks like arcing on the pic but its obviously = not..... the eramoc got so hot is just melted its way though the = plastic and it is cooked plastic on the outer surface. Also its not bulk = resistance at these freqs you have to consider skin effect in the SS. = Still interesting its only one insulator. It might be interesting to = look at it with a milliohm meter if you have such a beast. I would guess = you must have had the equivalent of 0.2 ohm or so to get that = hot....particularly in your climate :-)) Alan G3NYK ----- Original Message -----=20 From: Laurence KL7 L=20 To: rsgb_lf_group@blacksheep.org=20 Sent: Saturday, October 24, 2015 11:05 PM Subject: RE: LF: XPQ WSPR15 475/136 and warm ceramic feed thrus Thanks Alan - th iono really hadnt cooled off up here from the = continuous heating over the past month or so but it was getting better = so I thought Id better inject a little more heat http://kl7l.com/coupler3.jpg The Stainless 5/16th bolt in the feedthru must have had some = imperfections in manufacture and got extremely hot at circa 50-60A :-) = it didnt happen to the other bolt and wasnt at the wire connection = points each side. I think Ive had it with feed thrus' at this current and are going to = come straight in thru a hole drilled in a hi density cutting board.=20 I recall the original brass feed thrus getting a little warm but this = must have got real warm - sufficient to say the Decca kept on = transmitting and didnt see a high SWR at all over the past week... The Walmart Rubbermaid box was (is) in its 12th year and Im just = going to plate over it... :-) Laurence KL7L WE2XPQ -------------------------------------------------------------------------= ----- From: alan.melia@btinternet.com To: rsgb_lf_group@blacksheep.org Date: Sat, 24 Oct 2015 22:42:47 +0100 Subject: Re: LF: XPQ WSPR15 475/136 Hi Markus, yes I think that has been happening, but in Laurence's case = the first post did not appear to any of us so that was probably bounced = on theway in, but I have seen cases were posts have been reflected but = not received by the sender. Some ISPs seem to regard a message sent to = self as spam.....I regularly dig out my LF postings from my webmail spam = folder. Marking them as "Not Spam" does not seem to affect the rules in = "Spamguard", the filter used. I reckon you are due for a few down days Laurence the CME from the C5 = on the 22nd arrived at 1900z. Spaceweather maked it as arriving = unexpectedly early.....I dont see that the interval was about 62 hours. = We only caught the "wash" as it was not pointing at Earth, and that = could account for some of the longer interval. Alan ------=_NextPart_000_0120_01D10EB6.267C1D80 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Hi Laurence my book gives Stainless = Steel as 8=20 times  resistivity of Brass and 40 times  that of pure copper = so maybe=20 you were pushing your luck a bit, though I would have thought the = connections at=20 the ends would be problem. It looks like arcing on the pic but its = obviously=20 not..... the eramoc got so hot is just melted its  way though the = plastic=20 and it is cooked plastic on the outer surface. Also its not bulk = resistance at=20 these freqs you have to consider skin effect in the SS. Still = interesting its=20 only one insulator. It might be interesting to look at it with a = milliohm meter=20 if you have such a beast. I would guess you must have had the equivalent = of 0.2 ohm or so to get that hot....particularly in your climate=20 :-))
 
Alan
G3NYK
----- Original Message -----
From:=20 Laurence KL7 L =
Sent: Saturday, October 24, = 2015 11:05=20 PM
Subject: RE: LF: XPQ WSPR15 = 475/136 and=20 warm ceramic feed thrus

Thanks Alan - th iono really hadnt cooled off up here = from the=20 continuous heating over the past month or so but it was getting better = so I=20 thought Id better inject a little more heat


The Stainless 5/16th bolt in the feedthru must have had = some=20 imperfections in manufacture and got extremely hot at circa 50-60A :-) = it=20 didnt happen to the other bolt and wasnt at the wire connection points = each=20 side.

 I think Ive had it with feed thrus' at this = current and are=20 going to come straight in thru a hole drilled in a hi density cutting=20 board. 

I recall the original brass feed thrus getting a little = warm but=20 this must have got real warm - sufficient to say the Decca kept on=20 transmitting and didnt see a high SWR at all over the past = week...

The Walmart Rubbermaid box was (is)  in its 12th = year and Im=20 just going to plate over it... :-)

Laurence KL7L WE2XPQ



From: alan.melia@btinternet.com
To: = rsgb_lf_group@blacksheep.org
Date:=20 Sat, 24 Oct 2015 22:42:47 +0100
Subject: Re: LF: XPQ WSPR15 = 475/136

Hi Markus, yes I think that has been = happening,=20 but in Laurence's case the first post did not appear to any of us so = that was=20 probably bounced on theway in, but I have seen cases were posts have = been=20 reflected but not received by the sender. Some ISPs seem to regard a = message=20 sent to self as spam.....I regularly dig out my LF postings from my = webmail=20 spam folder. Marking them as "Not Spam" does not seem to affect the = rules in=20 "Spamguard", the filter used.
 
I reckon you are due for a few down = days Laurence=20 the CME from the C5 on the 22nd arrived at 1900z. Spaceweather maked = it as=20 arriving unexpectedly early.....I dont see that the interval was about = 62=20 hours. We only caught the "wash" as it was not pointing at Earth, and = that=20 could account for some of the longer interval.
 
Alan
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