Message-ID: <50B29376.8000001@iup.uni-heidelberg.de>
Date: Sun, 25 Nov 2012 22:53:58 +0100
From: =?UTF-8?B?U3RlZmFuIFNjaMOkZmVy?= <Stefan.Schaefer@iup.uni-heidelberg.de>
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To: rsgb_lf_group@blacksheep.org
References: <50B25B65.32617.1D3880C@mike.dennison.ntlworld.com> <820AB854-65CE-4C3B-AD7F-45F0FCAEC6D6@arimi.it>
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Subject: Re: LF: Off air due to fire
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Hello Mike,

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.

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:
> 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" 
> <mike.dennison@ntlworld.com <mailto:mike.dennison@ntlworld.com>> ha 
> scritto:
>
>> I am currently off the air following my loading coil catching fire
>> and damaging the house. I have had to take my mast down to allow
>> access to the builders who are repairing the damage. Fortunately I
>> was insured.
>>
>> Hopefully I will be able to receive before Christmas and transmit
>> again some time in January.
>>
>> Details and pictures are on my blog at:
>> http://g3xdv.blogspot.com
>>
>> Mike, G3XDV
>>

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Hello Mike, <br>
<br>
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. <br>
<br>
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!<br>
<br>
73, Stefan/DK7FC<br>
<br>
Am 25.11.2012 20:26, schrieb IZ2JGB:
<blockquote cite="mid:820AB854-65CE-4C3B-AD7F-45F0FCAEC6D6@arimi.it"
 type="cite">
  <meta http-equiv="content-type" content="text/html; charset=UTF-8">
  <div style="">sorry for the damage Mike. for all of us running txes
near the house it may</div>
  <div style="">be worth checking a suitable smoke/ion</div>
  <div style="">detector to mount near the tx and the coil. they cost
nothing , are available</div>
  <div style="">off the shelf and are pretty realiable.</div>
  <div style=""><br>
  </div>
  <div style="">look:</div>
  <div style=""><span
 style="font-family: '.HelveticaNeueUI'; font-size: 15px; line-height: 19px; white-space: nowrap;"><a
 moz-do-not-send="true"
 href="http://www.notifier.com/products/datasheets/DN_1154.pdf">http://www.notifier.com/products/datasheets/DN_1154.pdf</a></span></div>
  <div style=""><span
 style="font-family: '.HelveticaNeueUI'; font-size: 15px; line-height: 19px; white-space: nowrap;"><br>
  </span></div>
  <div style=""><span
 style="font-family: '.HelveticaNeueUI'; font-size: 15px; line-height: 19px; white-space: nowrap;"><br>
  </span></div>
  <div style=""><span
 style="font-family: '.HelveticaNeueUI'; font-size: 15px; line-height: 19px; white-space: nowrap;">73,</span></div>
  <div><font face=".HelveticaNeueUI"><span
 style="font-size: 15px; line-height: 19px; white-space: nowrap;">Giorgio</span></font></div>
  <div style=""><br>
  <br>
Inviato da iPhone</div>
  <div style=""><br>
Il giorno 25/nov/2012, alle ore 18:54, "Mike Dennison" &lt;<a
 moz-do-not-send="true" href="mailto:mike.dennison@ntlworld.com">mike.dennison@ntlworld.com</a>&gt;
ha scritto:<br>
  <br>
  </div>
  <blockquote type="cite" style="">
    <div><span>I am currently off the air following my loading coil
catching fire </span><br>
    <span>and damaging the house. I have had to take my mast down to
allow </span><br>
    <span>access to the builders who are repairing the damage.
Fortunately I </span><br>
    <span>was insured. </span><br>
    <span></span><br>
    <span>Hopefully I will be able to receive before Christmas and
transmit </span><br>
    <span>again some time in January. </span><br>
    <span></span><br>
    <span>Details and pictures are on my blog at:</span><br>
    <span><a moz-do-not-send="true" href="http://g3xdv.blogspot.com">http://g3xdv.blogspot.com</a></span><br>
    <span></span><br>
    <span>Mike, G3XDV</span><br>
    <span></span><br>
    </div>
  </blockquote>
</blockquote>
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