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 x0HDaS9P009742 for ; Thu, 17 Jan 2019 14:36:30 +0100 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1gk7lB-0006De-U6 for rs_out_1@blacksheep.org; Thu, 17 Jan 2019 13:31:05 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1gk7l8-0006DN-8t for rsgb_lf_group@blacksheep.org; Thu, 17 Jan 2019 13:31:02 +0000 Received: from smtp1web.tin.it ([212.216.176.195]) by relay1.thorcom.net with esmtp (Exim 4.91) (envelope-from ) id 1gk7l4-0006P5-St for rsgb_lf_group@blacksheep.org; Thu, 17 Jan 2019 13:31:01 +0000 Received: from feu13 (10.192.64.23) by smtp1web.tin.it (8.6.060.43) id 5AB0B63D0770BF80 for rsgb_lf_group@blacksheep.org; Thu, 17 Jan 2019 14:30:57 +0100 Received: from (87.12.12.26) by webmailtin.pc.tim.it; Thu, 17 Jan 2019 14:30:57 +0100 Message-ID: <1685c01eeef.marcocadeddu@tin.it> Date: Thu, 17 Jan 2019 14:30:57 +0100 (CET) From: "marcocadeddu@tin.it" To: Mime-Version: 1.0 X-Originating-IP: 87.12.12.26:1420 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: Hi Paul, will send you some pictures in a private mail (blackshhep doesn't allow heavy attachments) spreaded in some years of LF fun (for LF of course I mean the EA5DOM definition hi). Hope to see soon you new coil in action Paul! My opinion is that you haven't to blame SS hardware itself but the not properly tight connections or may be a missing washer that can make a not tight con [...] 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 [212.216.176.195 listed in list.dnswl.org] -0.0 SPF_PASS SPF: sender matches SPF record 0.0 FREEMAIL_FROM Sender email is commonly abused enduser mail provider (marcocadeddu[at]tin.it) 0.0 HTML_MESSAGE BODY: HTML included in message X-Scan-Signature: f0da950ecedac2a84ae70831926f1b39 Subject: R: Re: R: RE: LF: JT9-10 vs JT9-5 test ends with smoke :) Content-Type: multipart/alternative; boundary="----=_Part_47103_291021.1547731857139" 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=HTML_MESSAGE 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 ------=_Part_47103_291021.1547731857139 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Hi Paul, will send you some pictures in a private mail (blackshhep doesn't allow heavy attachments) spreaded in some years of LF fun (for LF of course I mean the EA5DOM definition hi). Hope to see soon you new coil in action Paul! My opinion is that you haven't to blame SS hardware itself but the not properly tight connections or may be a missing washer that can make a not tight connection a loose connection. I agree that SS has not the best conducibility in comparison to brass or copper but it is very nice if you can forget oxydation in the years. Maybe with the last LF (again the adapted meaning not low frequency) could suggest to check if all is stil tight after one or 2 weeks of service. 73, Marco IK1HSS ----Messaggio originale---- Da: paul@n1bug.com Data: 17-gen-2019 13.01 A: Ogg: Re: R: RE: LF: JT9-10 vs JT9-5 test ends with smoke :) Hi Marco, It's always interesting to see pics from other collections if you want to share. :-) After careful study of the ruined coil, I made a guess: SS hardware was a poor choice. Using the machine screw to carry RF from inside to outside of the coil form was not the best way. I think the hardware became slightly loose. We have all seen this happen when hardware is installed in "soft" plastics. Loose hardware caused higher resistance in the connection and more heat. More heat softened the plastic, which made the hardware more loose, more resistance, more heat. Eventually the connection became so loose there was an arc, too much heat and everything burned. Well, it's just a guess, but it's not too hard to imagine this can happen. Every nut and screw on that unit was a bit loose, even the ones that did not yet show any sign of overheating. I cut and drilled already a new coil form but I wait now for brass hardware to arrive before winding. 73, Paul On 1/16/19 8:37 AM, marcocadeddu@tin.it wrote: > ;-) I agree and will support you with the new meaning for LF!! > > Paul, the new pic is more impressive and shows a big burn... I > could send you some pic from my collection ;-) Just an idea for > the new version you are planning. As far as I understood the > mobile coil is part of the loading coil (If I assume wrong > discard..) where is it placed? would suggest to place in the > bottom part of the coil just to be in the lower voltage > environment. > > Of course when RF want to burn .. it burns! > > Marco, IK1HSS > > > > ----Messaggio originale---- Da: luis@vigilant.es Data: > 16-gen-2019 10.25 A: > "rsgb_lf_group@blacksheep.org" Ogg: > RE: LF: JT9-10 vs JT9-5 test ends with smoke :) > > Sorry to see the damages Paul. As Chris said very certainly "LF > without smoke is QRP" ;-) > > I would add that LF stands for "Let's Fire" and a "!" should be > added at the end > > 73 de Luis EA5DOM > > -----Mensaje original----- De: owner-rsgb_lf_group@blacksheep.org > [mailto:owner-rsgb_lf_group@blacksheep.org] En nombre de N1BUG > Enviado el: martes, 15 de enero de 2019 22:56 Para: > rsgb_lf_group@blacksheep.org Asunto: Re: LF: JT9-10 vs JT9-5 test > ends with smoke :) > > Eventually I will rebuild it perfect... although I would prefer > to start over with a new coil as this one requires too much > maintenance. Right now I don't have the luxury of time for any of > that. It's solar minimum and I need this thing working. :) > > I don't trust the inner coil form for HV now, too much carbon: > > http://www.n1bug.com/vario-fail-2-1200.jpg > > So that'll have to get replaced. I will make the connections > differently this time! > > 73, Paul > > > > On 1/15/19 10:42 AM, Chris Wilson wrote: >> >> >> Hello N1BUG, >> >> I too have had issues with bolted connections to the >> variometer. Not an expensive fix so long as you don't mind >> a few battle scars, but knowing you, you probably want it >> cosmetically perfect again ;) LF without smoke is QRP... >> >> Tuesday, January 15, 2019, 2:50:18 PM, you wrote: >> >>> Thanks to all who monitored and provided reports on this >>> latest test of slow JT9 modes. >> >>> The test ended suddenly around dawn this morning. Here is the >>> reason: >> >>> http://www.n1bug.com/vario-fail-1-1200.jpg >> >>> It's the inner coil from the 2200m loading coil / >>> variometer: >> >>> http://www.n1bug.com/vario-fail-0-1200.jpg >> >>> I had hoped to be on looking for QSOs tonight, but obviously >>> that is not going to be possible. I do not know when I will >>> be QRV again. >> >>> I have a very busy day today, so the final report on the JT9 >>> test might not be ready until tomorrow. >> >>> 73, Paul N1BUG ------=_Part_47103_291021.1547731857139 Content-Type: text/html;charset="UTF-8" Content-Transfer-Encoding: quoted-printable Hi Paul,

will send you some pictures in a private mail (blackshhep d= oesn't allow heavy attachments) spreaded in some years of LF fun (for LF of= course I mean the EA5DOM definition hi).

Hope to see soon you new c= oil in action Paul! My opinion is that you haven't to blame SS hardware its= elf but the not properly tight connections or may be a missing washer that = can make a not tight connection a loose connection. I agree that SS has not= the best conducibility in comparison to brass or copper but it is very nic= e if you can forget oxydation in the years. Maybe with the last LF (again t= he adapted meaning not low frequency) could suggest to check if all is stil= tight after one or 2 weeks of service.

73, Marco IK1HSS
  <= br>
----Messaggio originale----
Da: paul@n1bug.com
Data: 17-gen-2019 13.0= 1
A: <rsgb_lf_group@blacksheep.org>
Ogg: Re: R: RE: LF: JT9-10 = vs JT9-5 test ends with smoke :)

Hi Marco,

It's always intere= sting to see pics from other collections if you
want to share. :-)
After careful study of the ruined coil, I made a guess:

SS hardwar= e was a poor choice. Using the machine screw to carry RF
from inside to = outside of the coil form was not the best way. I
think the hardware beca= me slightly loose. We have all seen this
happen when hardware is install= ed in "soft" plastics. Loose hardware
caused higher resistance in the co= nnection and more heat. More heat
softened the plastic, which made the h= ardware more loose, more
resistance, more heat. Eventually the connectio= n became so loose
there was an arc, too much heat and everything burned.=

Well, it's just a guess, but it's not too hard to imagine this can<= br>happen.

Every nut and screw on that unit was a bit loose, even th= e ones that
did not yet show any sign of overheating.

I cut and d= rilled already a new coil form but I wait now for brass
hardware to arri= ve before winding.

73,
Paul



On 1/16/19 8:37 AM, ma= rcocadeddu@tin.it wrote:
> ;-) I agree and will support you with the = new meaning for LF!!
>
> Paul, the new pic is more impressive = and shows a big burn... I
> could send you some pic from my collectio= n ;-) Just an idea for
> the new version you are planning. As far as = I understood the
> mobile coil is part of the loading coil (If I assu= me wrong
> discard..) where is it placed? would suggest to place in t= he
> bottom part of the coil just to be in the lower voltage
> = environment.
>
> Of course when RF want to burn .. it burns!>
> Marco, IK1HSS
>
>
>
> ----Messag= gio originale---- Da: luis@vigilant.es Data:
> 16-gen-2019 10.25 A:> "rsgb_lf_group@blacksheep.org"<rsgb_lf_group@blacksheep.org> O= gg:
> RE: LF: JT9-10 vs JT9-5 test ends with smoke :)
>
>= ; Sorry to see the damages Paul. As Chris said very certainly "LF
> w= ithout smoke is QRP" ;-)
>
> I would add that LF stands for "L= et's Fire" and a "!" should be
> added at the end
>
> 73= de Luis EA5DOM
>
> -----Mensaje original----- De: owner-rsgb_= lf_group@blacksheep.org
> [mailto:owner-rsgb_lf_group@blacksheep.org]= En nombre de N1BUG
> Enviado el: martes, 15 de enero de 2019 22:56 = Para:
> rsgb_lf_group@blacksheep.org Asunto: Re: LF: JT9-10 vs JT9-5 = test
> ends with smoke :)
>
> Eventually I will rebuild = it perfect... although I would prefer
> to start over with a new coil= as this one requires too much
> maintenance. Right now I don't have = the luxury of time for any of
> that. It's solar minimum and I need t= his thing working. :)
>
> I don't trust the inner coil form fo= r HV now, too much carbon:
>
> http://www.n1bug.com/vario-fail= -2-1200.jpg
>
> So that'll have to get replaced. I will make t= he connections
> differently this time!
>
> 73, Paul
= >
>
>
> On 1/15/19 10:42 AM, Chris Wilson wrote:>>
>>
>> Hello N1BUG,
>>
>> I=   too  have had issues with bolted connections to the
>>= variometer. Not an  expensive  fix  so  long as you do= n't mind
>> a few battle scars, but knowing  you,  you&n= bsp; probably  want it
>> cosmetically perfect again ;) LF wi= thout smoke is QRP...
>>
>> Tuesday, January 15, 2019, 2= :50:18 PM, you wrote:
>>
>>> Thanks to all who monito= red and provided reports on this
>>> latest test of slow JT9 mo= des.
>>
>>> The test ended suddenly around dawn this = morning. Here is the
>>> reason:
>>
>>> h= ttp://www.n1bug.com/vario-fail-1-1200.jpg
>>
>>> It's= the inner coil from the 2200m loading coil /
>>> variometer:>>
>>> http://www.n1bug.com/vario-fail-0-1200.jpg
&= gt;>
>>> I had hoped to be on looking for QSOs tonight, but= obviously
>>> that is not going to be possible. I do not know = when I will
>>> be QRV again.
>>
>>> I ha= ve a very busy day today, so the final report on the JT9
>>> te= st might not be ready until tomorrow.
>>
>>> 73, Paul= N1BUG



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