Return-Path: Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-mj06.r1000.mx.aol.com (Internet Inbound) with ESMTP id D959738000099; Sun, 25 Nov 2012 17:14:31 -0500 (EST) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1TckSN-0008W0-0R for rs_out_1@blacksheep.org; Sun, 25 Nov 2012 22:13:43 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1TckSM-0008Vr-BD for rsgb_lf_group@blacksheep.org; Sun, 25 Nov 2012 22:13:42 +0000 Received: from smtpout3.wanadoo.co.uk ([80.12.242.59] helo=smtpout.wanadoo.co.uk) by relay1.thorcom.net with esmtp (Exim 4.77) (envelope-from ) id 1TckSJ-0007P8-Q7 for rsgb_lf_group@blacksheep.org; Sun, 25 Nov 2012 22:13:41 +0000 Received: from AGB ([2.26.21.234]) by mwinf5d43 with ME id TyDH1k00K531jAy03yDHQU; Sun, 25 Nov 2012 23:13:18 +0100 Message-ID: <775F26BA39C14E38B3C035492C037D4E@AGB> From: "Graham" To: References: <50B25B65.32617.1D3880C@mike.dennison.ntlworld.com> <820AB854-65CE-4C3B-AD7F-45F0FCAEC6D6@arimi.it> <50B29376.8000001@iup.uni-heidelberg.de> In-Reply-To: <50B29376.8000001@iup.uni-heidelberg.de> Date: Sun, 25 Nov 2012 22:13:17 -0000 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal Importance: Normal X-Mailer: Microsoft Windows Live Mail 14.0.8117.416 X-MimeOLE: Produced By Microsoft MimeOLE V14.0.8117.416 X-Spam-Score: 0.3 (/) X-Spam-Report: Spam detection software, running on the system "relay1.thorcom.net", has identified this incoming email as possible spam. 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Content preview: Yes , walking round in the dark looking for corona arc's from the Ae system is a little disconcerting , especially if you have cables routed inside buildings , where 'hot' spots could be nu-observed [...] Content analysis details: (0.3 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at http://www.dnswl.org/, no trust [80.12.242.59 listed in list.dnswl.org] 0.0 HTML_MESSAGE BODY: HTML included in message 0.3 HTML_FONT_FACE_BAD BODY: HTML font face is not a word X-Scan-Signature: 671be81035fb274514daa81d2095bf05 Subject: Re: LF: Off air due to fire Content-Type: multipart/alternative; boundary="----=_NextPart_000_014B_01CDCB5A.1223E590" X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: * X-Spam-Status: No, hits=1.7 required=5.0 tests=HTML_30_40,HTML_FONT_FACE_BAD, HTML_MESSAGE,HTML_TITLE_EMPTY,MISSING_OUTLOOK_NAME 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 x-aol-global-disposition: G x-aol-sid: 3039ac1d7b9a50b29847194a X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : none This is a multi-part message in MIME format. ------=_NextPart_000_014B_01CDCB5A.1223E590 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Yes , walking round in the dark looking for corona arc's from the = Ae system is a little disconcerting , especially if you have = cables routed inside buildings , where 'hot' spots could be = nu-observed=20 Well , the best fire suppression I have see (in action and never = in action) both of which are ' heat triggered mechanical - fail = safe'=20 Rally cars , with a GAS extinguisher , with pvc pipe routed = round the engine bay and inside the car , where a fire breaks = out , melts the pipe and fires the extinguisher , can have = multiple exit points if the pipe is ruptured in more than one = place -=20 Under ground (mining) power distribution , portable Sub-Stations = had a 'large' fire bottle and solid pipe distribution system, = with a 'nylon' cord connected to the valve , with a 'big' weight = , if there was a transformer 'fire' the nylon cord melted , = weight activated the 'long leaver' valve by gravity and the whole = bottle discharged into the equipment=20 Unfortunately BCF is no longer legal ( but I think still used in = aircraft and other last ditch systems) ideal medium =20 If the coil is in a B+Q shed , them may be either system would = work , but the pvc pipe method could be simper to arrange ? G.. From: Stefan Sch=C3=A4fer=20 Sent: Sunday, November 25, 2012 9:53 PM To: rsgb_lf_group@blacksheep.org=20 Subject: Re: LF: Off air due to fire Hello Mike,=20 I'm very sorry to hear about that! You're the most active station in the = UK these days so it's a big loss in this season :-/ At least you have = the insurance and there are no human losses! Maybe it is a warning to = other active stations.=20 An alternative to a smoke warning device could be a alarm bell that = starts to run when the PTT is pressed but the PA current is below a = certain adjustable threshold. It is not difficult to realise, a simple = comparator and a relay that switches the bell, for example. This bell = will start to run when the wire falls down or the antenna is strongly = out of resonance and so on, which may be helpful as well. E.g. it = prevents a blow up of a class E PA due to dramatic mismatch in case of = heavy load of snow on the TX system and so on. Of course the relay could = disable the PTT as well! 73, Stefan/DK7FC Am 25.11.2012 20:26, schrieb IZ2JGB:=20 sorry for the damage Mike. for all of us running txes near the house = it may be worth checking a suitable smoke/ion detector to mount near the tx and the coil. they cost nothing , are = available off the shelf and are pretty realiable. look: http://www.notifier.com/products/datasheets/DN_1154.pdf 73, Giorgio Inviato da iPhone Il giorno 25/nov/2012, alle ore 18:54, "Mike Dennison" = ha scritto: I am currently off the air following my loading coil catching fire=20 and damaging the house. I have had to take my mast down to allow=20 access to the builders who are repairing the damage. Fortunately I=20 was insured.=20 Hopefully I will be able to receive before Christmas and transmit=20 again some time in January.=20 Details and pictures are on my blog at: http://g3xdv.blogspot.com Mike, G3XDV ------=_NextPart_000_014B_01CDCB5A.1223E590 Content-Type: text/html; charset="utf-8" Content-Transfer-Encoding: quoted-printable
Yes , walking  round  in the  dark  = looking =20 for  corona arc's from the  Ae  system  is a =20 little  disconcerting  , especially  if you  = have =20 cables  routed  inside buildings , where  'hot'  = spots =20 could be  nu-observed
 
Well  , the  best  fire  suppression  I = have =20 see  (in action and never in action)  both  of  = which=20 are  ' heat  triggered mechanical - fail  safe'
 
Rally  cars  , with a   GAS =20 extinguisher   , with  pvc  pipe  =20 routed  round  the  engine  bay  = and   inside=20 the  car  , where  a  fire  breaks  out , = melts=20 the  pipe  and  fires the  extinguisher  , = can =20 have  multiple exit points  if the  pipe  is  = ruptured=20 in more than  one  place  -
 
Under ground  (mining) power  distribution  ,=20 portable  Sub-Stations  had a  'large'  = fire =20 bottle  and  solid  pipe  distribution  system, = with=20 a  'nylon'  cord  connected to  the  = valve  , with=20 a  'big'  weight ,  if there  was  a  = transformer=20 'fire'  the  nylon   cord melted  , = weight =20 activated the  'long leaver'  valve by  gravity=20  and  the  whole  bottle  discharged  into = the    equipment
 
Unfortunately   BCF is  no longer  legal  = (=20 but  I think  still  used in  aircraft and = other =20 last  ditch  systems) ideal   medium  
 
If the  coil  is  in a  B+Q  shed , them = may be=20 either  system  would  work   , but the  = pvc =20 pipe  method  could  be  simper to  = arrange =20 ?
 
G..
 
 
 
 

From: Stefan = Sch=C3=A4fer
Sent: Sunday, November 25, 2012 9:53 PM
To: rsgb_lf_group@blacksheep.org= =20
Subject: Re: LF: Off air due to fire

Hello Mike,

I'm very sorry to hear about that! = You're the=20 most active station in the UK these days so it's a big loss in this = season :-/=20 At least you have the insurance and there are no human losses! Maybe it = is a=20 warning to other active stations.

An alternative to a smoke = warning=20 device could be a alarm bell that starts to run when the PTT is pressed = but the=20 PA current is below a certain adjustable threshold. It is not difficult = to=20 realise, a simple comparator and a relay that switches the bell, for = example.=20 This bell will start to run when the wire falls down or the antenna is = strongly=20 out of resonance and so on, which may be helpful as well. E.g. it = prevents a=20 blow up of a class E PA due to dramatic mismatch in case of heavy load = of snow=20 on the TX system and so on. Of course the relay could disable the PTT as = well!

73, Stefan/DK7FC

Am 25.11.2012 20:26, schrieb = IZ2JGB:=20
sorry for the damage Mike. for all of us running = txes near=20 the house it may
be worth checking a suitable smoke/ion
detector to mount near the tx and the coil. they cost nothing , = are=20 available
off the shelf and are pretty realiable.

look:
http://www.notifier.com/products/datasheets/DN_1= 154.pdf


73,
Giorgio


Inviato da iPhone

Il giorno 25/nov/2012, alle ore 18:54, "Mike Dennison" <mike.dennison@ntlworld.com> ha=20 scritto:

I am currently off the air following my loading coil = catching=20 fire
and damaging the house. I have had to take my = mast=20 down to allow
access to the builders who are = repairing the=20 damage. Fortunately I
was insured.=20

Hopefully I will be able to = receive before=20 Christmas and transmit
again some time in January.=20

Details and pictures are on my = blog=20 at:
http://g3xdv.blogspot.com

Mike,=20 = G3XDV

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