Message-ID: <4F06F529.3000709@iup.uni-heidelberg.de>
Date: Fri, 06 Jan 2012 14:20:41 +0100
From: =?ISO-8859-1?Q?Stefan_Sch=E4fer?= <Stefan.Schaefer@iup.uni-heidelberg.de>
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Subject: Re: LF: UPC/APC and UPS's
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Hi Laurence,

(Thanks for the overnights capture!!)

About the UPS i would again suggest the small netbook, as recently 
discussed. It has a low power consumption, very low noise (acoustic and 
on the soundcard input) and holds up to 8 hours on batteries. The 
internal 96kS/s soundcard is excellent here.
Also there are no EMC problems when the power supply is connected, 
neither on probes nor on loops. All tested here so far...
I run 5 SL instances without problems. Also you may prevent problems 
from the LAN when using WLAN.

73, Stefan/DK7FC

Am 06.01.2012 14:01, schrieb Laurence KL7UK:
> Id be interested if anyone has any thoughts or results from finding an 
> effective and noise free at LF/MF PC sized 30 min UPS -Ive used 
> laptops in AK in the past but have gone "tower" for the past year on 
> one of the systems but the AC supply in Alaska is proving rather 
> unstable, (its been off three times overnight with the weather again)
>
> Im living in a ranch style house so dont have any Faraday cage 
> advantage  effects from rebar/brick/block - what noises are produced 
> sadly go straight out to the antennae. Im mulling over a purchase and 
> would like (I think) a pure sine wave version...
>
> thanks Laurence
>
>

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Hi Laurence, <br>
<br>
(Thanks for the overnights capture!!)<br>
<br>
About the UPS i would again suggest the small netbook, as recently
discussed. It has a low power consumption, very low noise (acoustic and
on the soundcard input) and holds up to 8 hours on batteries. The
internal 96kS/s soundcard is excellent here. <br>
Also there are no EMC problems when the power supply is connected,
neither on probes nor on loops. All tested here so far...<br>
I run 5 SL instances without problems. Also you may prevent problems
from the LAN when using WLAN.<br>
<br>
73, Stefan/DK7FC<br>
<br>
Am 06.01.2012 14:01, schrieb Laurence KL7UK:
<blockquote cite="mid:BLU153-W13959FC9C2178F22A588B1CF950@phx.gbl"
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  <div dir="ltr">Id be interested if anyone has any thoughts or results
from finding an effective and noise free at LF/MF PC sized 30 min UPS
-Ive used laptops in AK in the past but have gone "tower" for the past
year on one of the systems but the AC supply in Alaska is proving
rather unstable, (its been off three times overnight with the weather
again)<br>
  <br>
Im living in a ranch style house so dont have any Faraday cage
advantage&nbsp; effects from rebar/brick/block - what noises are produced
sadly go straight out to the antennae. Im mulling over a purchase and
would like (I think) a pure sine wave version...<br>
  <br>
thanks Laurence<br>
  <br>
  <br>
  </div>
</blockquote>
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